No ringback tone for some numbers - Telco issue?

[wilmer_1282004]

Good Day,

I am not getting ringback on some numbers but others work. Numbers reside in the same country. Can you tell if this is a Telco issue? Below are the part of the debug isdn / ccapi of working and non-working. I can reach the non-working number from a cellphone, so it seems like an issue on my part too. it shows SIGNAL INDICATION=NOT PRESENT on non-working debug. Where should i look to correct it?

Gateway is H323 and ISDN is PRI

WORKING

  Target Trkgrp Route Label=pstn, tg_label_flag=TRUE, Call Id=0xE00A
144869: Mar 30 18:50:20.539: ISDN Se0/0/1:15 Q931: Applying typeplan for sw-type 0x12 is 0x0 0x0, Calling num 4709
144870: Mar 30 18:50:20.543: ISDN Se0/0/1:15 Q931: Sending SETUP  callref = 0x588E callID = 0xD80F switch = primary-net5 interface = User 
144871: Mar 30 18:50:20.543: ISDN Se0/0/1:15 Q931: TX -> SETUP pd = 8  callref = 0x588E 
        Sending Complete 
        Bearer Capability i = 0x8090A3 
                Standard = CCITT 
                Transfer Capability = Speech  
                Transfer Mode = Circuit 
                Transfer Rate = 64 kbit/s 
        Channel ID i = 0xA98381 
                Exclusive, Channel 1 
        Calling Party Number i = 0x0081, '4709' 
                Plan:Unknown, Type:Unknown 
        Called Party Number i = 0x80, '0044XXXXXXX005' 
                Plan:Unknown, Type:Unknown
144872: Mar 30 18:50:20.719: ISDN Se0/0/1:15 Q931: RX <- CALL_PROC pd = 8  callref = 0xD88E 
        Channel ID i = 0xA98381 
                Exclusive, Channel 1
144873: Mar 30 18:50:20.779: //57355/809B383A6D2B/CCAPI/cc_api_call_proceeding:
   Interface=0x70D04890, Progress Indication=NULL(0)
144874: Mar 30 18:50:23.171: ISDN Se0/0/1:15 Q931: RX <- ALERTING pd = 8  callref = 0xD88E 
        Progress Ind i = 0x8482 - Destination address is non-ISDN 
144875: Mar 30 18:50:23.171: //57355/809B383A6D2B/CCAPI/cc_api_call_alert:
   Interface=0x70D04890, Progress Indication=DESTINATION IS NON ISDN(2), Signal Indication=SIGNAL RINGBACK(1) 
144876: Mar 30 18:50:23.171: //57355/809B383A6D2B/CCAPI/cc_api_call_alert:
   Call Entry(Retry Count=0, Responsed=TRUE)
144877: Mar 30 18:50:23.171: //57354/809B383A6D2B/CCAPI/ccCallAlert:
   Progress Indication=DESTINATION IS NON ISDN(2), Signal Indication=SIGNAL RINGBACK(1)
144878: Mar 30 18:50:23.171: //57354/809B383A6D2B/CCAPI/ccCallAlert:
   Call Entry(Responsed=TRUE, Alert Sent=TRUE)
144879: Mar 30 18:50:23.171: //57355/809B383A6D2B/CCAPI/cc_api_get_called_ccm_detected:
   CallInfo(ccm detected=0)
144880: Mar 30 18:50:23.171: //57354/809B383A6D2B/CCAPI/ccConferenceCreate:

NON-WORKING

144725: Mar 30 18:42:23.030: ISDN Se0/0/1:15 Q931: Applying typeplan for sw-type 0x12 is 0x0 0x0, Calling num 4709
144726: Mar 30 18:42:23.030: ISDN Se0/0/1:15 Q931: Sending SETUP  callref = 0x588D callID = 0xD80E switch = primary-net5 interface = User 
144727: Mar 30 18:42:23.034: ISDN Se0/0/1:15 Q931: TX -> SETUP pd = 8  callref = 0x588D 
        Sending Complete 
        Bearer Capability i = 0x8090A3 
                Standard = CCITT 
                Transfer Capability = Speech  
                Transfer Mode = Circuit 
                Transfer Rate = 64 kbit/s 
        Channel ID i = 0xA98381 
                Exclusive, Channel 1 
        Calling Party Number i = 0x0081, '4709' 
                Plan:Unknown, Type:Unknown 
        Called Party Number i = 0x80, '0044XXXXXXX179' 
                Plan:Unknown, Type:Unknown
144728: Mar 30 18:42:23.218: ISDN Se0/0/1:15 Q931: RX <- CALL_PROC pd = 8  callref = 0xD88D 
        Channel ID i = 0xA98381 
                Exclusive, Channel 1
144729: Mar 30 18:42:23.318: //57353/002FE81D6C2B/CCAPI/cc_api_call_proceeding:
   Interface=0x70D04890, Progress Indication=NULL(0)
144730: Mar 30 18:42:24.618: ISDN Se0/0/1:15 Q931: RX <- ALERTING pd = 8  callref = 0xD88D
144731: Mar 30 18:42:24.622: //57353/002FE81D6C2B/CCAPI/cc_api_call_alert:
   Interface=0x70D04890, Progress Indication=NULL(0), Signal Indication=NOT PRESENT(255)
144732: Mar 30 18:42:24.622: //57353/002FE81D6C2B/CCAPI/cc_api_call_alert:
   Call Entry(Retry Count=0, Responsed=TRUE)
144733: Mar 30 18:42:24.622: //57352/002FE81D6C2B/CCAPI/ccCallAlert:
   Progress Indication=NULL(0), Signal Indication=NOT PRESENT(255)
144734: Mar 30 18:42:24.622: //57352/002FE81D6C2B/CCAPI/ccCallAlert:
   Call Entry(Responsed=TRUE, Alert Sent=TRUE)
144735: Mar 30 18:42:24.622: //57353/002FE81D6C2B/CCAPI/cc_api_get_called_ccm_detected:

DIAL PEER config that is hit

dial-peer voice 5 pots
 trunkgroup pstn
 description Outbound Dial-Peer for International Calls
 translation-profile outgoing TranslateOutbound
 destination-pattern 00T
 direct-inward-dial
 prefix 00

Thanks for all replies.

Wilmer

[Aditya Gupta · Accepted solution]

Hi

What is the call control server here ? CUCM or CME .

IF CUCM how is it connecting to CUCM ( Protocol , H323, SIP or MGCP ) ?

Ring back is expected from the provider in your situation .

You can add following commands to fix the problem on the dial-peer (pots):

progress_ind alert enable 8
progress_ind progress enable 8
progress_ind connect enable 8

Following document will help u with better understanding of the issue:

http://www.cisco.com/c/en/us/support/docs/voice/h323/22983-ringback.html

Regards

Aditya Gupta

[acampbell]

Hi,

If you look and compare the debugs, for the non-working call you will notice  that you do not receive a PI with the ALERT

Working
144874: Mar 30 18:50:23.171: ISDN Se0/0/1:15 Q931: RX <- ALERTING pd = 8  callref = 0xD88E
        Progress Ind i = 0x8482 - Destination address is non-ISDN

Non-working

144730: Mar 30 18:42:24.618: ISDN Se0/0/1:15 Q931: RX <- ALERTING pd = 8  callref = 0xD88D
144731: Mar 30 18:42:24.622: //57353/002FE81D6C2B/CCAPI/cc_api_call_alert:
   Interface=0x70D04890, Progress Indication=NULL(0), Signal Indication=NOT PRESENT(255)

In the pots dial peer I always add  "tone ringback alert-no-PI" along with progress-ind commands

!
!
dial-peer voice 9 pots
 description *** O/G TRAFFIC TO PSTN ***
 destination-pattern 9T
 tone ringback alert-no-PI
 progress_ind setup enable 3
 progress_ind alert enable 8
 progress_ind progress enable 8
 progress_ind connect enable 8
 direct-inward-dial
 port 0/0/0:15
!

Regards
Alex

[wilmer_1282004]

Thanks Alex,

(+5) for the thorough explanation of interpreting the logs. It is then a best practice to always add these commands.

Cheers,

Wilmer

[acampbell]

Hi Wilmer,

Through the years and experiences you gain knowledge like you have learned re "no ringback tone".

You start to put together what the best practises are to give you the least grief with your implementations.

So like you have seen, I always use something like

!
dial-peer voice 9 pots
 description *** O/G TRAFFIC TO PSTN ***
 destination-pattern 9T
 tone ringback alert-no-PI
 progress_ind setup enable 3
 progress_ind alert enable 8
 progress_ind progress enable 8
 progress_ind connect enable 8
 direct-inward-dial
 port 0/0/0:15
!

For my outgoing dial peers for ISDN.

Regards

Alex

[wilmer_1282004]

Thanks Aditya,

It works now. So does this mean i should use these commands on the dial-peer as best practice even if other numbers work?

Thanks for the link. I'll read it when i got more time.