Lower channels can't be used on PRI-E1

[yelynntun]

Hello,

I'm encountering an voice call problem between C2801 and Nortel PABX.

All the outgoing call failed when it's on channel 16 from 0.

Is there something I miss out in configuration.

I tried both qsig and net5 switch type in cisco router.

Please see the attachment for the configurations.

I'll upload the q931 debug later.

thanks in advance

ylt

[keanej]

The Cisco config looks fine - I believe its related to the signalling channel and 'tie' configuration on the nortel pabx -

I have passed the config onto a nortel engineer here - I will let you know how he gets on.

[yelynntun]

Hello Keanej,

Please see the accachment for latest configuration on PABX system.

Cheers

YLT

[keanej]

Ok,

I have got feedback from the PABX guys, he thinks that the config looks fine.

I would recommend you wind it back to 16 channels - I think the problem is related to PVDMs or perhaps a lack of them in the 2801

- do you only have a PVDM 8 or PVDM 16 in there ??

We used a 2811 with a PVDM 64 to get ours working.

Normally 16 channels is more than enough for this type of interconnect - you will need to update the nortel.

On the cisco side
!
controller E1 0/0/0
framing NO-CRC4
pri-group timeslots 1-16
description E1 QSig Link
!

!
interface Serial0/0/0:15
description D-Channel for E1 QSig Link - This is Network Side.
no ip address
encapsulation hdlc
isdn switch-type primary-qsig
isdn timer T310 120000
isdn protocol-emulate network
isdn incoming-voice voice
!

voice-port 0/0/0:15
translation-profile incoming From-Meridian
cptone IE
music-threshold -50

Worth a  try !

[yelynntun]

hi

We are sing WIC card and according "show inventory" , it has two PVDM2-16 which should support 16 per each module.

PID: VWIC-1MFT-E1=     , VID: 1.0, SN: 34814364

NAME: "PVDMII DSP SIMM with one DSP", DESCR: "PVDMII DSP SIMM with one DSP"
PID: PVDM2-16          , VID: V01 , SN: FOC12340BEW

NAME: "PVDMII DSP SIMM with one DSP", DESCR: "PVDMII DSP SIMM with one DSP"
PID: PVDM2-16          , VID: NA  , SN: FOC092823J8

what should we need to update in Nortel if we roll back to 16 channel ?

regards

YLT

[keanej]

Unfortunately my NORTEL guy is gone home now - I will ask him for the config tomorrow morning and post the update for you.

I think it is worth a try - at least get it working and keep pushing it out until it breaks - at least then you know what the max channels supported is.

[yelynntun]

Actually it's working for upper channel 30-17 when i put " isdn bchan-number-order descending" command under serial interface.

[keanej]

Its weird that it happens when you hit channel 16, thats where the signalling is but if the signalling was wrong nothing would work!

[yelynntun]

yes i already changed WIC card and it's still the same