voice troubleshooting case debrief-PSTN ring FXS phone failed
Symptom:
Call from PSTN to C3845 FXS analog phone fails, to IP phone is ok.
debug isdn q931 :
Jun 22 01:43:52.430: ISDN Se0/0/1:15 Q931: TX -> CALL_PROC pd = 8 callref =
0x8078
Channel ID i = 0xA98382
Exclusive, Channel 2
Jun 22 01:43:52.434: ISDN Se0/0/1:15 Q931: TX -> PROGRESS pd = 8 callref =
0x8078
Progress Ind i = 0x8188 - In-band info or appropriate now available
Jun 22 01:43:52.462: ISDN Se0/0/1:15 Q931: RX <- DISCONNECT pd = 8 callref
= 0x0078
Cause i = 0x82EF - Protocol error; unspecified
The call from PSTN to FXS will be disconnected by PBX as GW send out a
PROGRESS to it. That means the GW does not accept the call from PBX.
FIX:
configure "voice call send-alert" on your GW to enables the
terminating gateway to send an alert message instead of a progress message
after it receives a call setup message.
-----
more on "voice call send-alert":
On a Cisco 5800 with a PRI-to-PRI configuration or an SS7-to-PRI configuration with the session initiation protocol (SIP) Hairpinning feature and interactive voice response (IVR) enabled, there is no speech path and no ringback for the calls. For calls with IVR and Direct Inward Dialing (DID) disabled, there is speech path
and ringback.
Workaround: Use the global configuration command voice call send-alert. This configures the alerting
message to trigger ringback instead of the progress message.
Call from PSTN to C3845 FXS analog phone fails, to IP phone is ok.
debug isdn q931 :
Jun 22 01:43:52.430: ISDN Se0/0/1:15 Q931: TX -> CALL_PROC pd = 8 callref =
0x8078
Channel ID i = 0xA98382
Exclusive, Channel 2
Jun 22 01:43:52.434: ISDN Se0/0/1:15 Q931: TX -> PROGRESS pd = 8 callref =
0x8078
Progress Ind i = 0x8188 - In-band info or appropriate now available
Jun 22 01:43:52.462: ISDN Se0/0/1:15 Q931: RX <- DISCONNECT pd = 8 callref
= 0x0078
Cause i = 0x82EF - Protocol error; unspecified
The call from PSTN to FXS will be disconnected by PBX as GW send out a
PROGRESS to it. That means the GW does not accept the call from PBX.
FIX:
configure "voice call send-alert" on your GW to enables the
terminating gateway to send an alert message instead of a progress message
after it receives a call setup message.
-----
more on "voice call send-alert":
On a Cisco 5800 with a PRI-to-PRI configuration or an SS7-to-PRI configuration with the session initiation protocol (SIP) Hairpinning feature and interactive voice response (IVR) enabled, there is no speech path and no ringback for the calls. For calls with IVR and Direct Inward Dialing (DID) disabled, there is speech path
and ringback.
Workaround: Use the global configuration command voice call send-alert. This configures the alerting
message to trigger ringback instead of the progress message.
posted by Jun Wen at 6:37 PM
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