voice troubleshooting case debrief-PSTN doesn't send disconnect
topology :
PSTN—gw-IP phone
Symptom:
The IP phone continues to ring after the calling user from PSTN hangs up.
Problem:
PSTN switch doesn’t send disconnect.
Root Cause:
If the local router originates a call out of an FXO voice port, the router has control over that call and can provide the disconnect. If the local router receives a call on an FXO voice port,the router requires that the connected switch provide the disconnect.
Fix:
Use Supervisory Disconnect Tone - (Compatible with Loop Start Signaling only )
If the FXO Supervisory Disconnect Tone feature is configured and a detectable tone from the PSTN or PBX is detected by the digital signal processor (DSP), the analog FXO port goes on-hook.
You can configure the router's FXO voice port to detect supervisory disconnect tones
use the config below for custom cptones and let me know if this works
for you.
voice class dualtone-detect-params 1
freq-max-deviation 25
cadence-variation 25
!
voice class custom-cptone custom
dualtone disconnect
frequency 425
cadence 500 500
!
voice-port 0/1/2
supervisory disconnect dualtone mid-call
supervisory custom-cptone custom
supervisory dualtone-detect-params 1
input gain 14
cptone CN
timeouts call-disconnect 2
timeouts wait-release 2
connection plar opx 13745000
!
------
topology :
PSTN—gw-IP phone
Symptom:
the FXO can not disconnect while the external line hung up.
Problem:
Shangdong NET-COM provide DTMF caller-id signal, which is not China standard "BELLCORE".
the FXO port can not detect the disconnect tone when the external line hangs up.
Root Cause:
If the local router originates a call out of an FXO voice port, the router has control over that call and can provide the disconnect. If the local router receives a call on an FXO voice port,the router requires that the connected switch provide the disconnect.
Fix:
customize tone command
Use Supervisory Disconnect Tone - (Compatible with Loop Start Signaling only )
If the FXO Supervisory Disconnect Tone feature is configured and a detectable tone from the PSTN or PBX is detected by the digital signal processor (DSP), the analog FXO port goes on-hook.
You can configure the router's FXO voice port to detect supervisory disconnect tones
use the config below for custom cptones and let me know if this works
for you.
voice class custom-cptone vc-1
dualtone disconnect
frequency 450
cadence 350 350
!
voice-port 0/1//0
cptone cn
timeouts call-disconnect 1
timeouts wait-release 3
supervisory custom-cptone vc-1
no battery-reversal
!
---
PSTN—gw-IP phone
Symptom:
The IP phone continues to ring after the calling user from PSTN hangs up.
Problem:
PSTN switch doesn’t send disconnect.
Root Cause:
If the local router originates a call out of an FXO voice port, the router has control over that call and can provide the disconnect. If the local router receives a call on an FXO voice port,the router requires that the connected switch provide the disconnect.
Fix:
Use Supervisory Disconnect Tone - (Compatible with Loop Start Signaling only )
If the FXO Supervisory Disconnect Tone feature is configured and a detectable tone from the PSTN or PBX is detected by the digital signal processor (DSP), the analog FXO port goes on-hook.
You can configure the router's FXO voice port to detect supervisory disconnect tones
use the config below for custom cptones and let me know if this works
for you.
voice class dualtone-detect-params 1
freq-max-deviation 25
cadence-variation 25
!
voice class custom-cptone custom
dualtone disconnect
frequency 425
cadence 500 500
!
voice-port 0/1/2
supervisory disconnect dualtone mid-call
supervisory custom-cptone custom
supervisory dualtone-detect-params 1
input gain 14
cptone CN
timeouts call-disconnect 2
timeouts wait-release 2
connection plar opx 13745000
!
------
topology :
PSTN—gw-IP phone
Symptom:
the FXO can not disconnect while the external line hung up.
Problem:
Shangdong NET-COM provide DTMF caller-id signal, which is not China standard "BELLCORE".
the FXO port can not detect the disconnect tone when the external line hangs up.
Root Cause:
If the local router originates a call out of an FXO voice port, the router has control over that call and can provide the disconnect. If the local router receives a call on an FXO voice port,the router requires that the connected switch provide the disconnect.
Fix:
customize tone command
Use Supervisory Disconnect Tone - (Compatible with Loop Start Signaling only )
If the FXO Supervisory Disconnect Tone feature is configured and a detectable tone from the PSTN or PBX is detected by the digital signal processor (DSP), the analog FXO port goes on-hook.
You can configure the router's FXO voice port to detect supervisory disconnect tones
use the config below for custom cptones and let me know if this works
for you.
voice class custom-cptone vc-1
dualtone disconnect
frequency 450
cadence 350 350
!
voice-port 0/1//0
cptone cn
timeouts call-disconnect 1
timeouts wait-release 3
supervisory custom-cptone vc-1
no battery-reversal
!
---
posted by Jun Wen at 5:39 PM
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