Post on 17-Jan-2020
DOCUMENT Date 11/01/2014
Département RD Rapport d'Audit Avencall
Référence WA14-P03-DOC049
Classification EXT Version A
Ce document est la propriété de la société WAVETEL et ne peut être reproduit sans son autorisation 11/01/2014 1/28 WAVETEL - SARL au capital de 80 000 € - RCS Lorient 443 937 719 00021 - Tél. : +33(0)2 97 35 36 12 www.wavetel.fr info@wavetel.fr
Rapport d'Audit
AvenCall
8 Janvier 2014
DOCUMENT Date 11/01/2014
Département RD Rapport d'Audit Avencall
Référence WA14-P03-DOC049
Classification EXT Version A
Ce document est la propriété de la société WAVETEL et ne peut être reproduit sans son autorisation 11/01/2014 2/28 WAVETEL - SARL au capital de 80 000 € - RCS Lorient 443 937 719 00021 - Tél. : +33(0)2 97 35 36 12 www.wavetel.fr info@wavetel.fr
Rapport d'Audit Avencall Liste de diffusion
Société
Destinataires
(A)ction, (I)nformation,
(Ar)chivage
Support de diffusion
WAVETEL Nicolas BOHELAY (I)
Documentaliste (Ar)
Fichier pdf
AVENCALL Etienne ALLOVON (I)
Jérémie BOISSET (I)
Fichier pdf
Gestion des évolutions
Identification du document Description évolutions
WA14-P03-DOC049 A 11/01/2014 Document initial (28 pages)
Signatures
Rédacteur Approbateur
Hubert CHARTIN
Le 11 Janvier 2014
Signature :
Nicolas BOHELAY
Le 11 Janvier 2014
Signature :
Classification
Niveau Document Interne (EXT)
Enregistrement
Archivé Le :
Tampon société :
DOCUMENT Date 11/01/2014
Département RD Rapport d'Audit Avencall
Référence WA14-P03-DOC049
Classification EXT Version A
Ce document est la propriété de la société WAVETEL et ne peut être reproduit sans son autorisation 11/01/2014 3/28 WAVETEL - SARL au capital de 80 000 € - RCS Lorient 443 937 719 00021 - Tél. : +33(0)2 97 35 36 12 www.wavetel.fr info@wavetel.fr
Table des Matières
1. Introduction ........................................................................................................................ 4 2. Generalities ......................................................................................................................... 5
2.1. Objectives .................................................................................................................... 5 2.2. Acteurs ......................................................................................................................... 5
3. Audit Introduction .............................................................................................................. 5 3.1. Test Bench and Tools : ................................................................................................ 5
3.1.1. Material : .............................................................................................................. 5
3.1.2. Software: .............................................................................................................. 6 3.2. Environement Description ........................................................................................... 6
4. Test Plan ............................................................................................................................. 7 5. Preliminary Remarks .......................................................................................................... 7 6. Connection Tests : .............................................................................................................. 9
6.1. XIVO facing TNR6G Layer 1 Required Layer 2 Leave Down .................................. 9 6.1.1. Point to Multi point configuration ........................................................................ 9
6.1.2. Point to point configuration ................................................................................ 11 6.2. XIVO facing TNR6G Layer 1 Ignore Layer 2 Leave Down ..................................... 13
6.2.1. Point to Multi point configuration ...................................................................... 13 6.2.2. Point to point configuration ................................................................................ 15
6.3. XIVO facing TNR6G Layer 1 Ignore Layer 2 Keep Up ........................................... 19 6.3.1. Point to Multi point configuration ...................................................................... 19
6.3.2. Point to point configuration ................................................................................ 22 6.4. XIVO facing TNR6G Layer 1 Required Layer 2 Keep Up ....................................... 23
6.4.1. Point to Multi point configuration ...................................................................... 23 6.4.2. Point to point configuration ................................................................................ 24
7. Conclusions ...................................................................................................................... 26
DOCUMENT Date 11/01/2014
Département RD Rapport d'Audit Avencall
Référence WA14-P03-DOC049
Classification EXT Version A
Ce document est la propriété de la société WAVETEL et ne peut être reproduit sans son autorisation 11/01/2014 4/28 WAVETEL - SARL au capital de 80 000 € - RCS Lorient 443 937 719 00021 - Tél. : +33(0)2 97 35 36 12 www.wavetel.fr info@wavetel.fr
1. Introduction
Avencall has developped an IPPBX called XIVO. This PBX is integrating a Digium ISDN
board with 4 BRI interfaces (S0/T0).
Recently Avencall encountered some troubles at customer’s sites to make the solution
effective facing Orange network. When the problem occurs the XIVO is connected through the
Digium ISDN board to the Orange NT1s.
As a first analysis it seems that the problem is mainly due to the layer 1 management that
occurs on the french BRI. The Layer 1 is not permanent and when the Layer 1 is down it seems
very difficult for the system to place outgoing calls.
As there is no layer 1 establishment the XIVO system is out of service during a period that can
last several minutes for outgoing and incoming calls.
Wavetel is a french company specialised in Test equipment for access and core networks
(ISDN, XDSL, Fiber, LAN, WAN, 4G/LTE). Wavetel has developped a full range of IDSN
protocol analysers and BERT tester and has a deep expertise and know how in that matter.
Wavetel has a branch of audit and consulting activity and has been missioned by XIVO to try
to troubleshoot the problem of Layer 1 establishment.
For this first collaboration between Wavetel and Avencall, the scope of the technical audit is
as following :
Provision of the Wavetel Labs in Larmor-Plage in order to try the trouble that Avencall is
facing at customer site including :
Technical Assistance to set up the test system,
Provision of ISDN BRI analysers at U and S0/T0 interfaces,
Data analysis assistane performed by our IDSN expert
The scope of this document is to summarise the tests that have been performed at the Wavetel
labs during one day and to provide some clues to find a solution to understand how the Digium
board behaves facing the Orange NT1.
DOCUMENT Date 11/01/2014
Département RD Rapport d'Audit Avencall
Référence WA14-P03-DOC049
Classification EXT Version A
Ce document est la propriété de la société WAVETEL et ne peut être reproduit sans son autorisation 11/01/2014 5/28 WAVETEL - SARL au capital de 80 000 € - RCS Lorient 443 937 719 00021 - Tél. : +33(0)2 97 35 36 12 www.wavetel.fr info@wavetel.fr
2. Generalities
2.1. Objectives
The main objective of this first test session that took place the 8 of January was to try to
reproduce at the lab the XIVO troubles and then to perform some deep protocol analysis.
2.2. Acteurs
The project leader delegated by XIVO to perform thoses tests is Frédéric Tarrieras
The project leader at Wavetel conducting the Audit at Wavetel is Hubert CHARTIN
Nicolas BOHELAY, Wavetel technical manager, is also providing some assistance et technical
analysis.
3. Audit Introduction
The tests took place at Larmor-Plage the 8th of January. The analysis was performed in real
time with the assistance of Frédéric. It was quite easy to reproduce the troubles that XIVO is
encoutering at customer site.
3.1. Test Bench and Tools :
In order to be able to reproduce the trouble it was mandatory to have the same configuration at
the lab that the one at customer. To do so thanks to its connnection with ELCON, the main NT1
provider for Orange, Wavetel was able to provide the NT1 6G that seems to be involved
inXIVO/Digium behavior. Then in order to be able to trace and to analyse the ISDN BRI interface,
the WAVETEL U and S analysers were available and installer between the Digium board and the
Orange ISDN LT.
3.1.1. Material :
The ACTRIS S0 is a powerful ISDN
protocol analyser that is able to fully decode
the D-Channel ISDN signalling at the
U/S0/T0 BRI interfaces according to the
European standards
(EDSS1/Q.931/Q.921/VN2 to VN7, QSIG
….).
The ARGUS 125 is a BERT tester for ISDN
BRI and PRI. It is a reference product used
worldwide by Telcos to qualify ISDN
accesses.
The ARGUS will be used in TE mode in
order to understand and to diagnose the
Layer 1 activation trouble.
DOCUMENT Date 11/01/2014
Département RD Rapport d'Audit Avencall
Référence WA14-P03-DOC049
Classification EXT Version A
Ce document est la propriété de la société WAVETEL et ne peut être reproduit sans son autorisation 11/01/2014 6/28 WAVETEL - SARL au capital de 80 000 € - RCS Lorient 443 937 719 00021 - Tél. : +33(0)2 97 35 36 12 www.wavetel.fr info@wavetel.fr
3.1.2. Software:
3.1.2.1. ACTW eXpert protocol analysis software :
Le logiciel ACTW eXpert permet d'effectuer un décodage
exhaustif niveaux 1, 2 et 3 de la majorité des protocoles en
vigueur EDSS1, VN7, QSIG avec différentes fonctions d'analyse
et de recherche de défauts. La fonction tickets de
communications apporte une synthèse de l'ensemble des
communications qui ont eu lieu sur un ou plusieurs accès RNIS.
Un entête d'analyse statistique permet de détecter
automatiquement les causes éventuelles d'échec des appels et
l'occupation des canaux B de l'installation.
3.2. Environement Description
Xivo was setup in the following configuration :
- One 4 BRI Digium Board
- Two IP Phones
The XIVO was connected to one or two ISDN accesses.
The ISDN accesses were provided by Orange and it was possible to exchange the NT1 in order
to perform some tests with different manufacturers.
The main NT1 available were :
TNR2G / ELCON (NT1 ab)
TNR6G / ELCON (NT1 6G
TNR G / Sagem
The ACTRIS S0 was connected in high impedande at the S0 interface.
The ACTRIS U was only usefull on a few test to check the behavior of the U interface and to
control if there were some difference between te signalling at the U and S interfaces.
DOCUMENT Date 11/01/2014
Département RD Rapport d'Audit Avencall
Référence WA14-P03-DOC049
Classification EXT Version A
Ce document est la propriété de la société WAVETEL et ne peut être reproduit sans son autorisation 11/01/2014 7/28 WAVETEL - SARL au capital de 80 000 € - RCS Lorient 443 937 719 00021 - Tél. : +33(0)2 97 35 36 12 www.wavetel.fr info@wavetel.fr
4. Test Plan
We will test the connection of the XIVO PABX to different types of NT1. The main idea is
first to be able to reproduce the customer trouble.
Then for each test sequence we will connect the ISDN BRI tester to the same NT1 to check if
there is also some difficulties in order to know of the trouble is issued from the Terminal
Equipment (XIVO or ARGUS) or from the NT1.
During each test campaign we will analyse carefully from one side the log of the XIVO
system and from the other side the ISDN signalling.
5. Preliminary Remarks
XIVO and Digium Configuration :
According to the layer 1 troubles we have to take care of the Digium Board configuration :
File /etc/dahdi/system.conf :
Port creation and inilisation as following :
Span = 1,1,0,ccs,ami
Ccs : channel common signalling. It is correct.
Ami : U interface code (Alternate Mark Inversion)
Synchro : it is not clear ; the XIVO has to act as a TE mode so in that case the XIVO through
the Digium board is slave relating to the clock that is provided by the NT1.
® Remark1 : The ami code is a three states line code that is no more used in France for
years. The U interace code is 2B1Q. Anyway it should not impact a connection at the S0/T0
interface
DOCUMENT Date 11/01/2014
Département RD Rapport d'Audit Avencall
Référence WA14-P03-DOC049
Classification EXT Version A
Ce document est la propriété de la société WAVETEL et ne peut être reproduit sans son autorisation 11/01/2014 8/28 WAVETEL - SARL au capital de 80 000 € - RCS Lorient 443 937 719 00021 - Tél. : +33(0)2 97 35 36 12 www.wavetel.fr info@wavetel.fr
File /etc/asterisk/dahdi-channels.conf and chan-dahdi.conf:
Customer Premises Equipment configuration :
Parameter Possible values
Signalling CPE bri_cpe (Point to Point ) or
bri_cpe_ptmp (Point to Multi-Point)
® Remark2 : The XIVO is configured most of the time in Point to Multipoint with a
dynamic TEI management.
We are quite surprised as the XIVO is in a typical point to point configuration. The XIVO is
the only Termincal equipment (CPE) connected on the S-Bus.
This should imply a point to point configuration with a TEI assigned in manual mode and
equal to 0.This is typically the PBX configuration that is used mostly to interconnect PBX
to the ISDN network.
Layer 1 and Layer 2 behavior :
Parameter Possible values
Layer 1 presence Required or Ignore
Layer2-persistence Keep_up / Leave-down
® Remark3 : The Layer 1 is not permanent at the S0/T0 interface. This means that when
there is no layer 1 active, the CPE (ie Digium board) will have to activate the layer 1 and
then the layer 2 to achieve an outgoin call. This is under the responsability of the CPE.
The firmware can ignore the Layer 1 value anyway you need a Layer 1 activated to be able
to setup the layer 2 and then to place a call.
The standard is the I.430. The layer 1 is activated on request to save energy.
DOCUMENT Date 11/01/2014
Département RD Rapport d'Audit Avencall
Référence WA14-P03-DOC049
Classification EXT Version A
Ce document est la propriété de la société WAVETEL et ne peut être reproduit sans son autorisation 11/01/2014 9/28 WAVETEL - SARL au capital de 80 000 € - RCS Lorient 443 937 719 00021 - Tél. : +33(0)2 97 35 36 12 www.wavetel.fr info@wavetel.fr
Layer 1 activation (TE/NT1)
6. Connection Tests :
Different tests are performed towards several NT1. It appears clearly that time to time the
XIVO system is locked and unable to place some simple calls. If we place the Argus tester in
the same configuration it works perfectly.
However it seems difficult to make a simple diagnose so we decide to focus on the TNR6G
from ELCOM that seems to imply troubles on the field.
We will run different tests with the different valued of Layer 1, Layer 2 and PP/PMP
configuration. Then we will place outgoing and incoming calls
6.1. XIVO facing TNR6G Layer 1 Required Layer 2 Leave Down
6.1.1. Point to Multi point configuration
Outgoing Call
03 :07 pm
The XIVO is not able to establish the Layer 1 nor the Layer 2.
The XIVO does not answer to the TEI Check Request from the Network
The Layer 1 is not stable
After some testing the U interface is getting down
DOCUMENT Date 11/01/2014
Département RD Rapport d'Audit Avencall
Référence WA14-P03-DOC049
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Incoming Call
03 :03 PM
Analysis :
The incoming call conforms to the standard
with a TEI 127 as the layer 2 is not still
assigned.
The CPE request a TEI and get 105
assigned.
The layer 2 is then established (SABME/UA)
Anomaly Report 1
(L1R,L2LD,PMP)
The XIVO rejects the call in PMP with a
cause value 44 (circuit not avaible). This is
not standard and nor understandable. This
cause is a network cause and then no channel
are assigned on the S-Bus
Relating frames :
DOCUMENT Date 11/01/2014
Département RD Rapport d'Audit Avencall
Référence WA14-P03-DOC049
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6.1.2. Point to point configuration
Outgoing Call
03 :19 pm
The XIVO is configured in point to point.
Nothing is happening on the S Bus when we try to establish a call.
There is no layer 1 activation.
The analyser is able to detect the presence of the PS1 (Power supply 1 in
fanthom mode).
If we perform the same test with the ARGUS there is no trouble to establish
a call.
Anomaly
Report 2
(L1R,L2LD,P
P)
The XIVO is not activating the layer 1 at the S0 interface. The logs are not
consistant as the system is stating layer 1 and layer 2 activation but nothing
is happening on the S bus.
DOCUMENT Date 11/01/2014
Département RD Rapport d'Audit Avencall
Référence WA14-P03-DOC049
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Outgoing Call
03 :21 pm
The XIVO is configured in point to point.
The networks is delivering a standard incoming call with a regular SETUP
The XIVO is establishing the Layer 2 (SABME/UA : TEI 0)
The XIVO rejects again the incoming call with a cause value 44
The XIVO does not answer to the TEI Check Request from the network
Anomaly
Report 3
(L1R,L2LD,P
P)
The XIVO rejects the call in PP with a cause value 44 (circuit not avaible).
This is not standard and nor understandable. This cause is a network cause
and then no channel are assigned on the S-Bus
Anomaly
Report 4
The XIVO when configured in PP mode TEI = 0 does not answer to the TEI
check request with Ai value (127) from the network.
No answer to the TEI Check Request
DOCUMENT Date 11/01/2014
Département RD Rapport d'Audit Avencall
Référence WA14-P03-DOC049
Classification EXT Version A
Ce document est la propriété de la société WAVETEL et ne peut être reproduit sans son autorisation 11/01/2014 13/28 WAVETEL - SARL au capital de 80 000 € - RCS Lorient 443 937 719 00021 - Tél. : +33(0)2 97 35 36 12 www.wavetel.fr info@wavetel.fr
6.2. XIVO facing TNR6G Layer 1 Ignore Layer 2 Leave Down
6.2.1. Point to Multi point configuration
Outgoing
Calls
And Incoming
Calls
03 :21 pm
First Initialisation is quite long.
Then The XIVO is able to place several successful outgoing calls
Call Trace Summary (CDR)
Outgoing Call trace – with TEI assignment
0178:L: 08/01/14 15:46:52:70 N->U :INFO 4 U->N :INFO 0
0179:L: 08/01/14 15:46:52:72 N->U :INFO 0 U->N :INFO 0
0180:L: 08/01/14 15:46:52:77 N->U :INFO 0 U->N :INFO 1
0181:L: 08/01/14 15:46:52:84 N->U :INFO 2 U->N :INFO 1
0182:L: 08/01/14 15:46:52:84 N->U :INFO 2 U->N :INFO 3
0183:L: 08/01/14 15:46:52:89 N->U :INFO 4 U->N :INFO 3
0184:N: 08/01/14 15:46:55:91 63 127 1 UI 0 ... ... 15 00000 ID check requ. 127
0185:N: 08/01/14 15:46:56:94 63 127 1 UI 0 ... ... 15 00000 ID check requ. 127
0186:U: 08/01/14 15:46:57:78 63 127 0 UI 0 ... ... 15 27655 ID request 127
0187:N: 08/01/14 15:46:57:80 63 127 1 UI 0 ... ... 15 27655 ID assigned 106
0188:U: 08/01/14 15:46:57:81 00 106 0 SABME 1 ... ...
0189:N: 08/01/14 15:46:57:82 00 106 0 UA 1 ... ...
0190:U: 08/01/14 15:46:57:85 00 106 0 I 0 000 000 08 1 01 0 SETUP
BEARER CAPABILITY (04) 03 80 90 A3
coding standard: CCITT
information : speech
transfer mode : circuit mode
transfer rate : 64 kbit/s
layer 1 protoc.: Recommendation G.711 A-law
CHANNEL IDENTIFIC. (18) 01 81
int id present : interface implicitly identified
interface type : basic interface
DOCUMENT Date 11/01/2014
Département RD Rapport d'Audit Avencall
Référence WA14-P03-DOC049
Classification EXT Version A
Ce document est la propriété de la société WAVETEL et ne peut être reproduit sans son autorisation 11/01/2014 14/28 WAVETEL - SARL au capital de 80 000 € - RCS Lorient 443 937 719 00021 - Tél. : +33(0)2 97 35 36 12 www.wavetel.fr info@wavetel.fr
prefer./exclus.: preferred
Channel identif: not D-channel
info chan sel. : B1 channel
CALLING PARTY NUMB (6C) 0B 21 80 32 39 37 38 33 37 35 33 30
type of number : national number
numbering plan : ISDN/telephony numbering plan (E.164)
presentat. ind : presentation allowed
screening ind. : user-provided, not screened
number digits : 297837530
CALLED PARTY NUMB. (70) 0B 80 30 36 34 37 38 38 32 31 30 38
type of number : unknown
numbering plan : unknown
number digits : 0647882108
SENDING COMPLETE (A1)
0191:N: 08/01/14 15:46:57:86 00 106 0 RR 0 ... 001
0192:N: 08/01/14 15:46:57:96 63 127 1 UI 0 ... ... 15 00000 ID check requ. 127
0193:U: 08/01/14 15:46:57:97 63 127 0 UI 0 ... ... 15 62771 ID check resp. 106
0194:N: 08/01/14 15:46:58:27 00 106 1 I 0 000 001 08 1 01 1 CALL PROCEEDING
CHANNEL IDENTIFIC. (18) 01 89
int id present : interface implicitly identified
interface type : basic interface
prefer./exclus.: exclusive
Channel identif: not D-channel
info chan sel. : B1 channel
0195:U: 08/01/14 15:46:58:27 00 106 1 RR 0 ... 001
0196:N: 08/01/14 15:46:59:59 00 106 1 I 0 001 001 08 1 01 1 ALERTING
0197:U: 08/01/14 15:46:59:60 00 106 1 RR 0 ... 002
0198:U: 08/01/14 15:47:09:50 00 106 0 I 0 001 002 08 1 01 0 DISCONNECT
CAUSE (08) 02 81 90
coding standard: CCITT
location : private network serving the local user
cause : Normal call clearing #16
0199:N: 08/01/14 15:47:09:51 00 106 0 RR 0 ... 002
0200:N: 08/01/14 15:47:09:71 00 106 1 I 0 002 002 08 1 01 1 RELEASE
0201:U: 08/01/14 15:47:09:72 00 106 1 RR 0 ... 003
0202:U: 08/01/14 15:47:09:73 00 106 0 I 0 002 003 08 1 01 0 RELEASE COMPLETE
CAUSE (08) 02 81 90
coding standard: CCITT
location : private network serving the local user
cause : Normal call clearing #16
0203:N: 08/01/14 15:47:09:74 00 106 0 RR 0 ... 003
0204:N: 08/01/14 15:47:11:84 00 106 1 DISC 1 ... ...
0205:U: 08/01/14 15:47:11:85 00 106 1 UA 1 ... ...
DOCUMENT Date 11/01/2014
Département RD Rapport d'Audit Avencall
Référence WA14-P03-DOC049
Classification EXT Version A
Ce document est la propriété de la société WAVETEL et ne peut être reproduit sans son autorisation 11/01/2014 15/28 WAVETEL - SARL au capital de 80 000 € - RCS Lorient 443 937 719 00021 - Tél. : +33(0)2 97 35 36 12 www.wavetel.fr info@wavetel.fr
6.2.2. Point to point configuration
Layer 2 establishment The layer two establishment conforms to the
standard with TEI = 0.
Despites the layer 2 is established the XIVO
board does not answer to the TEI check
request.
Cf Anomaly Report 4
Outgoing Calls All the outgoing calls are rejected with a
cause value 21 (Call rejected from the
Network).
If we perform the test with the same Layer 2
configuration, the call is accepted.
The main difference seems to come from the
fact that the Argus is answering to the
Identity check from the network.
DOCUMENT Date 11/01/2014
Département RD Rapport d'Audit Avencall
Référence WA14-P03-DOC049
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Outgoing Call full trace
0005:U: 08/01/14 15:28:39:91 00 000 0 SABME 1 ... ...
0006:N: 08/01/14 15:28:39:92 00 000 0 UA 1 ... ...
0007:N: 08/01/14 15:28:42:72 63 127 1 UI 0 ... ... 15 00000 ID check requ. 127
0008:N: 08/01/14 15:28:43:74 63 127 1 UI 0 ... ... 15 00000 ID check requ. 127
0009:N: 08/01/14 15:28:49:91 00 000 1 RR 1 ... 000
0010:U: 08/01/14 15:28:49:91 00 000 1 RR 1 ... 000
0011:U: 08/01/14 15:28:59:91 00 000 0 RR 1 ... 000
0012:N: 08/01/14 15:28:59:92 00 000 0 RR 1 ... 000
0013:N: 08/01/14 15:29:03:96 63 127 1 UI 0 ... ... 15 00000 ID check requ. 127
0014:N: 08/01/14 15:29:04:98 63 127 1 UI 0 ... ... 15 00000 ID check requ. 127
0015:U: 08/01/14 15:29:09:93 00 000 0 RR 1 ... 000
0016:N: 08/01/14 15:29:09:94 00 000 1 RR 1 ... 000
0017:N: 08/01/14 15:29:09:94 00 000 0 RR 1 ... 000
0018:U: 08/01/14 15:29:09:94 00 000 1 RR 1 ... 000
0019:U: 08/01/14 15:29:11:69 00 000 0 I 0 000 000 08 1 01 0 SETUP
BEARER CAPABILITY (04) 03 80 90 A3
coding standard: CCITT
information : speech
transfer mode : circuit mode
transfer rate : 64 kbit/s
layer 1 protoc.: Recommendation G.711 A-law
CHANNEL IDENTIFIC. (18) 01 81
int id present : interface implicitly identified
interface type : basic interface
prefer./exclus.: preferred
Channel identif: not D-channel
info chan sel. : B1 channel
CALLING PARTY NUMB (6C) 0B 21 80 31 32 33 34 35 36 37 38 39
type of number : national number
numbering plan : ISDN/telephony numbering plan (E.164)
presentat. ind : presentation allowed
screening ind. : user-provided, not screened
number digits : 123456789
CALLED PARTY NUMB. (70) 05 80 33 30 30 30
type of number : unknown
numbering plan : unknown
number digits : 3000
SENDING COMPLETE (A1)
0020:N: 08/01/14 15:29:11:71 00 000 0 RR 0 ... 001
0021:N: 08/01/14 15:29:11:81 00 000 1 I 0 000 001 08 1 01 1 RELEASE COMPLETE
CAUSE (08) 02 87 95
coding standard: CCITT
location : international network
cause : Call rejected #21
0022:U: 08/01/14 15:29:11:82 00 000 1 RR 0 ... 001
0023:N: 08/01/14 15:29:13:81 00 000 1 DISC 1 ... ...
DOCUMENT Date 11/01/2014
Département RD Rapport d'Audit Avencall
Référence WA14-P03-DOC049
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Anomaly
Report 5
In PP mode, L1 Ignore L2 leave_down all the outgoing calls are rejected by
the network (21). Then the trace in the log file of the XIVO is not consistant
(awaiting TEI when you are in PP mode)
Incoming Calls The incoming calls are sucessfull with a
complete Layer 2 establishment
0083:U: 08/01/14 15:39:25:67 00 000 0 SABME 1 ... ...
0084:N: 08/01/14 15:39:25:68 00 000 0 UA 1 ... ...
0085:N: 08/01/14 15:39:27:11 63 127 1 UI 0 ... ... 15 00000 ID check requ. 127
0086:N: 08/01/14 15:39:28:14 63 127 1 UI 0 ... ... 15 00000 ID check requ. 127
0087:N: 08/01/14 15:39:28:35 00 127 1 UI 0 ... ... 08 1 0C 0 SETUP
SENDING COMPLETE (A1)
BEARER CAPABILITY (04) 03 80 90 A3
coding standard: CCITT
information : speech
transfer mode : circuit mode
transfer rate : 64 kbit/s
layer 1 protoc.: Recommendation G.711 A-law
CHANNEL IDENTIFIC. (18) 01 89
int id present : interface implicitly identified
interface type : basic interface
prefer./exclus.: exclusive
Channel identif: not D-channel
info chan sel. : B1 channel
CALLING PARTY NUMB (6C) 0B 21 80 36 34 37 38 38 32 31 30 38
type of number : national number
numbering plan : ISDN/telephony numbering plan (E.164)
presentat. ind : presentation allowed
screening ind. : user-provided, not screened
number digits : 647882108
CALLING PARTY NUMB (6C) 0B 20 83 36 34 37 38 38 32 31 30 38
type of number : national number
numbering plan : unknown
presentat. ind : presentation allowed
screening ind. : network provided
number digits : 647882108
CALLED PARTY NUMB. (70) 05 81 37 35 33 30
type of number : unknown
numbering plan : ISDN/telephony numbering plan (E.164)
number digits : 7530
0088:U: 08/01/14 15:39:28:36 00 000 0 I 0 000 000 08 1 0C 1 CALL PROCEEDING
CHANNEL IDENTIFIC. (18) 01 89
int id present : interface implicitly identified
interface type : basic interface
prefer./exclus.: exclusive
Channel identif: not D-channel
info chan sel. : B1 channel
0089:N: 08/01/14 15:39:28:37 00 000 0 RR 0 ... 001
0090:U: 08/01/14 15:39:28:86 00 000 0 I 0 001 000 08 1 0C 1 ALERTING
PROGRESS INDICATOR (1E) 02 81 88
DOCUMENT Date 11/01/2014
Département RD Rapport d'Audit Avencall
Référence WA14-P03-DOC049
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coding standard: CCITT
location : private network serving the local user
description : In band information or app. pattern now available
0091:N: 08/01/14 15:39:28:87 00 000 0 RR 0 ... 002
0092:U: 08/01/14 15:39:31:40 00 000 0 I 0 002 000 08 1 0C 1 CONNECT
CHANNEL IDENTIFIC. (18) 01 89
int id present : interface implicitly identified
interface type : basic interface
prefer./exclus.: exclusive
Channel identif: not D-channel
info chan sel. : B1 channel
PROGRESS INDICATOR (1E) 02 81 82
coding standard: CCITT
location : private network serving the local user
description : Destination address is non ISDN
CONNECTED NUMBER (4C) 06 00 80 31 30 30 31
type of number : unknown
numbering plan : unknown
presentat. ind : presentation allowed
screening ind. : user-provided, not screened
number digits : 1001
0093:N: 08/01/14 15:39:31:41 00 000 0 RR 0 ... 003
0094:N: 08/01/14 15:39:31:70 00 000 1 I 0 000 003 08 1 0C 0 CONNECT ACK
0095:U: 08/01/14 15:39:31:71 00 000 1 RR 0 ... 001
0096:U: 08/01/14 15:39:37:38 00 000 0 I 0 003 001 08 1 0C 1 DISCONNECT
CAUSE (08) 02 81 90
coding standard: CCITT
location : private network serving the local user
cause : Normal call clearing #16
0097:N: 08/01/14 15:39:37:39 00 000 0 RR 0 ... 004
0098:N: 08/01/14 15:39:37:67 00 000 1 I 0 001 004 08 1 0C 0 RELEASE
0099:U: 08/01/14 15:39:37:68 00 000 1 RR 0 ... 002
0100:U: 08/01/14 15:39:37:69 00 000 0 I 0 004 002 08 1 0C 1 RELEASE COMPLETE
CAUSE (08) 02 81 90
coding standard: CCITT
location : private network serving the local user
cause : Normal call clearing #16
0101:N: 08/01/14 15:39:37:70 00 000 0 RR 0 ... 005
0102:N: 08/01/14 15:39:39:78 00 000 1 DISC 1 ... ...
0103:U: 08/01/14 15:39:39:79 00 000 1 UA 1 ... ...
DOCUMENT Date 11/01/2014
Département RD Rapport d'Audit Avencall
Référence WA14-P03-DOC049
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6.3. XIVO facing TNR6G Layer 1 Ignore Layer 2 Keep Up
6.3.1. Point to Multi point configuration
Outgoing Calls Primitive TEI Management in the XIVO log
file but nothing is happening on the S0
interface.
Difficulties to set up outgoing calls from
scratch.
Outgoing call procedure is using two SETUP
and has some difficulties to manage Call
Context
Outgoing calls are finished with a Release complete message with a cause stating Invalid Call
reference value coming from the User (XIVO).
DOCUMENT Date 11/01/2014
Département RD Rapport d'Audit Avencall
Référence WA14-P03-DOC049
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The Call Proceeding is answering to the first SETUP messages (Cref : 07). It is refused by the
XIVO. This may be a problem of timer.
Anomaly
Report 6
In case of multiple outgoing calls with a delayed network response the
XIVO (through dahdi) is not managing properly the Call Ref and rejects
some calls.
Incoming Calls Seems to be OK.
If you perform an outgoing call just after an
incoming it works then.
N: 08/01/14 16:14:00:52 U,Normal call clearing #16 B1
16:13:49:97 647882108 7530 0012
speech
16:13:57:29 3 sec
****************************************************************************
N: 0:00 00 127 1 UI 0 ... ... 08 1 12 0 SETUP
SENDING COMPLETE (A1)
BEARER CAPABILITY (04) 03 80 90 A3
coding standard: CCITT
information : speech
transfer mode : circuit mode
Two
SETUP
with Call
Ref : 07
Two
SETUP
with Call
Ref : 08
DOCUMENT Date 11/01/2014
Département RD Rapport d'Audit Avencall
Référence WA14-P03-DOC049
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transfer rate : 64 kbit/s
layer 1 protoc.: Recommendation G.711 A-law
CHANNEL IDENTIFIC. (18) 01 89
int id present : interface implicitly identified
interface type : basic interface
prefer./exclus.: exclusive
Channel identif: not D-channel
info chan sel. : B1 channel
CALLING PARTY NUMB (6C) 0B 21 80 36 34 37 38 38 32 31 30 38
type of number : national number
numbering plan : ISDN/telephony numbering plan (E.164)
presentat. ind : presentation allowed
screening ind. : user-provided, not screened
number digits : 647882108
CALLING PARTY NUMB (6C) 0B 20 83 36 34 37 38 38 32 31 30 38
type of number : national number
numbering plan : unknown
presentat. ind : presentation allowed
screening ind. : network provided
number digits : 647882108
CALLED PARTY NUMB. (70) 05 81 37 35 33 30
type of number : unknown
numbering plan : ISDN/telephony numbering plan (E.164)
number digits : 7530
U: 2:51 00 108 0 I 0 004 000 08 1 12 1 CALL PROCEEDING
CHANNEL IDENTIFIC. (18) 01 89
int id present : interface implicitly identified
interface type : basic interface
prefer./exclus.: exclusive
Channel identif: not D-channel
info chan sel. : B1 channel
U: 2:53 00 108 0 I 0 005 000 08 1 12 1 ALERTING
PROGRESS INDICATOR (1E) 02 81 88
coding standard: CCITT
location : private network serving the local user
description : In band information or app. pattern now available
U: 7:32 00 108 0 I 0 007 002 08 1 12 1 CONNECT
CHANNEL IDENTIFIC. (18) 01 89
int id present : interface implicitly identified
interface type : basic interface
prefer./exclus.: exclusive
Channel identif: not D-channel
info chan sel. : B1 channel
PROGRESS INDICATOR (1E) 02 81 82
coding standard: CCITT
location : private network serving the local user
description : Destination address is non ISDN
CONNECTED NUMBER (4C) 06 00 80 31 30 30 31
type of number : unknown
numbering plan : unknown
presentat. ind : presentation allowed
screening ind. : user-provided, not screened
number digits : 1001
DOCUMENT Date 11/01/2014
Département RD Rapport d'Audit Avencall
Référence WA14-P03-DOC049
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N: 7:65 00 108 1 I 0 002 008 08 1 12 0 CONNECT ACK
U: 10:25 00 108 0 I 0 008 003 08 1 12 1 DISCONNECT
CAUSE (08) 02 81 90
coding standard: CCITT
location : private network serving the local user
cause : Normal call clearing #16
N: 10:54 00 108 1 I 0 003 009 08 1 12 0 RELEASE
U: 10:55 00 108 0 I 0 009 004 08 1 12 1 RELEASE COMPLETE
CAUSE (08) 02 81 90
coding standard: CCITT
location : private network serving the local user
cause : Normal call clearing #16
6.3.2. Point to point configuration
Layer 2 establishment The layer two establishment conforms to the
standard with TEI = 0.
Despites the layer 2 is established the XIVO
board does not answer to the TEI check
request.
Cf Anomaly Report 4
Outgoing Calls Unsuccessfull.
When we try to setup outgoing calls there is
no activity in the S0 bus. No Layer 1
activation and no layer 2 either.
After an incoming call it is possible to place
an outgoing call. the outgoing calls is one
more time rejected with a cause value 21
(Call rejected from the Network).
This can be linked to the non answering to
TEI management.
Incominng Calls Successfull.
DOCUMENT Date 11/01/2014
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6.4. XIVO facing TNR6G Layer 1 Required Layer 2 Keep Up
6.4.1. Point to Multi point configuration
Layer 2 establishment Conforms to the standard
Outgoing Calls Unsuccessfull.
There is no signalling for outgoing calls.
Nothing happens when we off hook the IP
Phones.
After one incoming call it is again possible to
place outgoing calls.
0146:L: 08/01/14 16:45:33:79 N->U :INFO 4 U->N :INFO 0
0147:L: 08/01/14 16:45:33:80 N->U :INFO 0 U->N :INFO 0
0148:L: 08/01/14 16:45:33:84 PS1 DISCONNECTION
0149:L: 08/01/14 16:45:33:84 N->U :INFO 0 U->N :INFO 1
0150:L: 08/01/14 16:47:19:59 PS1 CONNECTION
0151:L: 08/01/14 16:48:19:54 N->U :INFO 2 U->N :INFO 1
0152:L: 08/01/14 16:48:19:54 N->U :INFO 2 U->N :INFO 3
Incoming Calls According to the trace there is an incoming
call from the network.
The channel selected by the network is the
B1 channel.
The XIVO answer is a release with no
channel available. But there is no other active
calls.
The XIVO log is again not consistent.
Anomaly
Report 7
In point to multipoint configuration PMP Mode the XIVO sometimes rejects
calls with a « no circuit available » cause value that is not consistant.
DOCUMENT Date 11/01/2014
Département RD Rapport d'Audit Avencall
Référence WA14-P03-DOC049
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6.4.2. Point to point configuration
Layer 2 establishment The layer two establishment conforms to the
standard with TEI = 0.
Despites the layer 2 is established the XIVO
board does not answer to the TEI check
request.
Cf Anomaly Report 4
Outgoing Calls Unsuccessfull.
The outgoing calls is one more time rejected
with a cause value 21 (Call rejected from the
DOCUMENT Date 11/01/2014
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Network).
This can be linked to the non answering to
TEI management.
The layer 1 is not stable.
After incoming call it is again possible to
place outgoing calls
Incominng Calls Successfull.
DOCUMENT Date 11/01/2014
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7. Conclusions
The test performed facing the TNR-6G are providing the following anomaly reports
synthesis :
Anomaly Report 1
(L1R,L2MD,PMP)
The XIVO rejects the call in PMP with a cause value 44 (circuit not
avaible). This is not standard and nor understandable. This cause is a
network cause and then no channel are assigned on the S-Bus
Anomaly Report 2
(L1R,L2LD,PP)
The XIVO is not activating the layer 1 at the S0 interface. The logs are
not consistant as the system is stating layer 1 and layer 2 activation but
nothing is happening on the S bus.
Anomaly Report 3
(L1R,L2LD,PP)
The XIVO rejects the call in PP with a cause value 44 (circuit not
avaible). This is not standard and nor understandable. This cause is a
network cause and then no channel are assigned on the S-Bus
Anomaly Report 4
The XIVO when configured in PP mode TEI = 0 does not answer to the
TEI check request with Ai value (127) from the network.
Anomaly Report 5 In PP mode, L1 Ignore L2 leave_down all the outgoing calls are
rejected by the network (21). Then the trace in the log file of the XIVO
is not consistant (awaiting TEI when you are in PP mode)
Anomaly Report 6 In case of multiple outgoing calls with a delayed network response the
XIVO (through dahdi) is not managing properly the Call Ref and
rejects some calls.
Anomaly Report 7 In point to multipoint configuration PMP Mode the XIVO sometimes
rejects calls with a « no circuit available » cause value that is not
consistant.
As a summary we can notice the following points :
Point to point mode (TEI 0) :
The system does not work properly in Point to Point mode,
The layer 1 is not stable,
The system is not providing any answer to the TEI check
Following this the outgoing calls on a TEI = 0 are unsuccessful with a release
cause 21 (call rejected)
The system is often not able to activate the Layer 1 and the S Bus and in that
case the logfile is not correct in comparison to the IDSN analyser traces
DOCUMENT Date 11/01/2014
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Point to Multi point mode :
During the tests we encoutered some troubles with the Call references and with
the circuit assignment management from the TE side.
The PMP mode seems to be more stable despite it is not the logical
configuration for a PBX acting as NT2 in the standard.
DOCUMENT Date 11/01/2014
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As a general remark the difference between the TNR6G from Elcon and the
others NT1 is that one is self powered from the network. It may happen that the
Digium board is perturbing the Layer 1 caracteristics of the NT1 (power
consumption or bad impedance)