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| Solution # |
K65703904 |
| Title |
In Cisco CallManager with the H.323 IOS gateway when PSTN users go on-hook to call an IP phone, they receive a recorded message rather than a disconnect |
| Core Issue |
The debug Isdn q931 command output shows this message when the Public Switched Telephone Network (PSTN) user hangs up the call:
ISDN Se1/0:15 Q931: call_disc: PI received in disconnect; Postpone sending RELEASE for callid 0x8012 |
| Resolution |
Issue the voice call disc-pi-off command on the H.323 gateway so the gateway treats a disconnect message with a Progress Indicator (PI), as it treats a standard disconnect without a PI, (issue the voice call disc-pi-off command in global configuration mode).
For more information on this command, refer voice call disc-pi-off in the Commands: vad (dial peer) through voice class dualtone-detect-params.
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| Problem Type |
Call control software (CallManager, CallManager Express, ICS7750, SRST, SS7 call agents)
Call connection (Connection quality: One-way audio, no busy tone, dropped calls, etc.) |
| Call Control |
CallManager |
| Call Connection |
Disconnection failure
Dropped or disconnected calls
Announcement |
| CallManager Features |
Bad operational behavior, status,information, performance, delay or other CCM failure |
| Failure Type |
Bad operational behavior
Incorrect tone, music, greeting, prompt, message, announcement, etc.
Incorrect information: Wrong, mismatched, unsynchronized version, message, time, statistics, results, database, language, text, etc. |
| Frequency and Scope of Symptom |
Occurs only during or after a specific event |
| When Problem Occurs |
After phone is hung up |
| End Where Problem is Heard or Device Type Involved |
Analog phone |
| Call Topology and Direction |
PSTN/PBX/gateway > IP network |
| IOS Debug Commands |
debug isdn q931 |
| Q931 and H225 Call Setup Messages |
RELEASE
PROGRESS |
| Signaling Protocol |
H323 |
| H323 Features |
H323 call statistics |
| CallManager Versions |
CallManager 3.3
CallManager 4.0
CallManager 4.1
CallManager 3.0
CallManager 3.1
CallManager 3.2 |
| Direct URL |
http://www.ciscotaccc.com/voice/showcase?case=K65703904 |
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