No ring-back tone

[mflak]

When somebody is calling to 4-channel IP AutoAttendant (standard IVR script aa.aef) and is choosing "1" to switch to specific directory number (to specific IP Phone) the call is switched corretly but user on calling side hear "silence" (no ring-back tone) when call is in progress. This is of course confused ('death air"). I used IP Phone's 7910 and 7940. How to switch on ring-back tone.

Thanks for any sugestions !!!

Maciej Flak

[smahbub]

A similar topic has been discussed earlier in this forum. The link to which is,

http://forums.cisco.com/eforum/servlet/NetProf?page=netprof&CommCmd=MB%3Fcmd%3Ddisplay_location%26location%3D.ee874c2

Some very useful troubleshooting links to the concerned problem are:

PSTN Callers not Hearing any Ring Back When they Call IP Phones

http://www.cisco.com/warp/public/788/AVVID/pstn_ip_ring.html

Troubleshooting No Ringback Tone on ISDN-VoIP (H.323) Calls

http://www.cisco.com/warp/public/788/voip/ringback.html

Hope this helps.

[lopezasp]

Upgrade the IOS of your voice gateway to 12.2.8T or later.

Hope this will help you...

[s.anthony]

When I experienced this TAC had me enter the global config command "voice call send-alert". It got the job done.

Hope this helps.