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T1 Isdn Setup

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The ISDIAG trace shows all is OK, but no calls are arriving on the system.

As the two VG traces were made at the same time as when ISDIAG was running they do not hold valid info.

 

Here is a sample of the ISDIAG trace. It all looks pretty much like below:

PROTOCOL TYPE                : PRI NI2

TRACE START TIME (MM/DD/YYYY) : 3/4/2006, 11:34:40.46

 

Time Stamp : 3/4/2006, 11:34:41.846

RECEIVE

Command=1  SAPI=0x00

TEI=0x00

0x01 0x2f  Receive Ready

 

 

                                      Time Stamp : 3/4/2006, 11:34:41.846

                                      TRANSMIT

                                      Response=1  SAPI=0x00

                                      TEI=0x00

                                      0x01 0x2f  Receive Ready

 

 

Time Stamp : 3/4/2006, 11:34:51.846

RECEIVE

Command=1  SAPI=0x00

TEI=0x00

0x01 0x2f  Receive Ready

 

 

                                      Time Stamp : 3/4/2006, 11:34:51.846

                                      TRANSMIT

                                      Response=1  SAPI=0x00

                                      TEI=0x00

                                      0x01 0x2f  Receive Ready

 

 

Time Stamp : 3/4/2006, 11:35:1.846

RECEIVE

Command=1  SAPI=0x00

TEI=0x00

0x01 0x2f  Receive Ready

 

 

                                      Time Stamp : 3/4/2006, 11:35:1.846

                                      TRANSMIT

                                      Response=1  SAPI=0x00

                                      TEI=0x00

                                      0x01 0x2f  Receive Ready

 

 

Time Stamp : 3/4/2006, 11:35:11.846

RECEIVE

Command=1  SAPI=0x00

TEI=0x00

0x01 0x2f  Receive Ready

 

 

                                      Time Stamp : 3/4/2006, 11:35:11.846

                                      TRANSMIT

                                      Response=1  SAPI=0x00

                                      TEI=0x00

                                      0x01 0x2f  Receive Ready

 

 

Time Stamp : 3/4/2006, 11:35:21.846

RECEIVE

Command=1  SAPI=0x00

TEI=0x00

0x01 0x2f  Receive Ready

 

 

                                      Time Stamp : 3/4/2006, 11:35:21.846

                                      TRANSMIT

                                      Response=1  SAPI=0x00

                                      TEI=0x00

                                      0x01 0x2f  Receive Ready

 

 

Time Stamp : 3/4/2006, 11:35:31.846

RECEIVE

Command=1  SAPI=0x00

TEI=0x00

0x01 0x2f  Receive Ready

 

 

                                      Time Stamp : 3/4/2006, 11:35:31.846

                                      TRANSMIT

                                      Response=1  SAPI=0x00

                                      TEI=0x00

                                      0x01 0x2f  Receive Ready

 

 

Time Stamp : 3/4/2006, 11:35:41.846

RECEIVE

Command=1  SAPI=0x00

TEI=0x00

0x01 0x2f  Receive Ready

 

 

                                      Time Stamp : 3/4/2006, 11:35:41.846

                                      TRANSMIT

                                      Response=1  SAPI=0x00

                                      TEI=0x00

                                      0x01 0x2f  Receive Ready

 

 

Time Stamp : 3/4/2006, 11:35:51.846

RECEIVE

Command=1  SAPI=0x00

TEI=0x00

0x01 0x2f  Receive Ready

 

 

                                      Time Stamp : 3/4/2006, 11:35:51.846

                                      TRANSMIT

                                      Response=1  SAPI=0x00

                                      TEI=0x00

                                      0x01 0x2f  Receive Ready

 

 

Time Stamp : 3/4/2006, 11:36:1.846

RECEIVE

Command=1  SAPI=0x00

TEI=0x00

0x01 0x2f  Receive Ready

 

 

                                      Time Stamp : 3/4/2006, 11:36:1.846

                                      TRANSMIT

                                      Response=1  SAPI=0x00

                                      TEI=0x00

                                      0x01 0x2f  Receive Ready

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Here is a trace from ISDIAG now showing an incoming call arriving on system. ISDIAG is unable to obtain ANI from the SETUP message, reporting that "message is either too big or too small"

tr1.txt

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This NI2 line (and some other T1 ISDN lines) used slot 24 as an additional signaling slot. As such VoiceGuide needed to be configured to only open the first 23 channels.

 

When only the first 23 channels were opened the calls arrived and were answered by VoiceGuide with no problems. VoiceGudie also extracted both the CallerID and DNIS (number dialed by caller) with no problems.

ie. All is OK.

 

If the 24th channel was opened as well the signaling line would not work and callers would be played an 'all circuits are busy' message by the telco.

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