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Unknown Number

All calls from PSTN displayed as Unknown number .

what steps should i take to troubleshoot this issue ?

3 ACCEPTED SOLUTIONS

Accepted Solutions
Cisco Employee

Re: Unknown Number

Is PSTN sending caller-ID information? Please run "debug voice ccapi inout" aso that we can check if we are receving calling party number.

Cisco Employee

Re: Unknown Number

If u plug in an analog phone with callerID display to the telco/pbx

line (line that's plugged into router's FXO port) and place

a call from outside, do u see callerID display ?

Also, is it the caller ID name or number that you are not seeing?

Please capture "debug vpm signal" and attach your config

for review if you this needs to be investigated further.

Cisco Employee

Re: Unknown Number

FYI, if you have CLID enabled on the FXO, and the CP tone is configured properly, and CLID doesn't work, but it works with an analog handset, then get:

> debug voip ccapi inout
> debug voip hpi all
> debug vpm sig
> debug vpm dsp

Collected via:

Router(config)# service sequence
Router(config)# service timestamps debug datetime msec
Router(config)# logging buffered 10000000 7
Router(config)# no logging con
Router(config)# no logging mon
Router(config)# voice iec syslog

Router# term len 0

Router# sh logg

But before you do that, you may want to try changing the 'caller-id alerting ring X' setting in case the provider is sending the CLID after a non standard amount of rings for that country.  That should be evident when you do the analog phone test, though.

10 REPLIES
Cisco Employee

Re: Unknown Number

Start at the point where the PSTN calls first reach your network domain which would be a debug on the gateway.  Do a "debug isdn q931" to see if the calling party number presented or restricted there to start.  If it is then the provider is blocking it, otherwise check the Device > Gateway > Port settings on call manager.

Cisco Employee

Re: Unknown Number

Hi,

Is this a PRI or a FXO? And how is gateway configured? H323 or MGCP gateway

New Member

Re: Unknown Number

Its Normal FXO port .

the gateway configured as H.323 gateway .

Cisco Employee

Re: Unknown Number

Ok. So is "caller-id enable" command given under the voice-port of FXO?

New Member

Re: Unknown Number

yes , its enabled .

this is the configuration under fxo port :

voice-port 0/3/1

trunk-group XXXXXXX

compand-type a-law

cptone BR

timeouts ringing infinity

connection plar opx XXX

caller-id enable

caller-id alerting dsp-pre-allocate

Cisco Employee

Re: Unknown Number

Is PSTN sending caller-ID information? Please run "debug voice ccapi inout" aso that we can check if we are receving calling party number.

Hall of Fame Super Gold

Re: Unknown Number

manosrin wrote:

Is PSTN sending caller-ID information? Please run "debug voice ccapi inout" aso that we can check if we are receving calling party number.

Actually the correct debug to run in these cases is "debug vooce vpm signal".

However, often Cisco is very flaky in detecting caller-id, moreover Brazil uses a totally different standard from other countries, so either the Cisco TAC has a way to get it working, or one is out of luck.

Cisco Employee

Re: Unknown Number

If u plug in an analog phone with callerID display to the telco/pbx

line (line that's plugged into router's FXO port) and place

a call from outside, do u see callerID display ?

Also, is it the caller ID name or number that you are not seeing?

Please capture "debug vpm signal" and attach your config

for review if you this needs to be investigated further.

Cisco Employee

Re: Unknown Number

FYI, if you have CLID enabled on the FXO, and the CP tone is configured properly, and CLID doesn't work, but it works with an analog handset, then get:

> debug voip ccapi inout
> debug voip hpi all
> debug vpm sig
> debug vpm dsp

Collected via:

Router(config)# service sequence
Router(config)# service timestamps debug datetime msec
Router(config)# logging buffered 10000000 7
Router(config)# no logging con
Router(config)# no logging mon
Router(config)# voice iec syslog

Router# term len 0

Router# sh logg

But before you do that, you may want to try changing the 'caller-id alerting ring X' setting in case the provider is sending the CLID after a non standard amount of rings for that country.  That should be evident when you do the analog phone test, though.

New Member

Re: Unknown Number

Many Thanks to all of you , it seems  problem from Telco ,they are not sending Caller ID.

Thanks

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