When I call the PSTN number, the IP Phone displays: From Unknown Numbe

[medzeinmaaloum]

Good day,

After having made the following configuration, as soon as I dial the number 45290216 the extension 4001 rings so I can make the communication without problem, but the IP Phone 4001 does not display the calling number it displays the message: From Unknown Number

see photo.

See the following configuration:

voice-port 0/0/0

 connection plar opx 4001

 description PSTN-FXO 45290216

 caller-id enable

!

voice-port 0/0/1

!

voice-port 0/0/2

!

voice-port 0/0/3

dial-peer voice 3 pots

 description 8-digit dialing

 destination-pattern 9T

 port 0/0/0

best regards,

[b.winter]

there is a similar post:
https://community.cisco.com/t5/ip-telephony-and-phones/incomming-call-from-pstn-showing-quot-unknown-number-quot-on/m-p/2758602

[Roger Kallberg]

Try with setting the appropriate cptone under the voice port(s) to match the country where you're deploying your gateway and make sure that your telco is actually sending caller id information.

[medzeinmaaloum]

if my country in not include in the below list, that's mean that I can't display the caller number?

Router_Data_Voice(config)# voice-port 0/0/0
Router_Data_Voice(config-voiceport)#cptone ?
locale 2 letter ISO-3166 country code

AR Argentina IN India PA Panama
AU Australia ID Indonesia PE Peru
AT Austria IE Ireland PH Philippines
BE Belgium IL Israel PL Poland
BR Brazil IT Italy PT Portugal
CA Canada JP Japan RU Russian Federation
CL Chile JO Jordan SA Saudi Arabia
CN China KE Kenya SG Singapore
CO Colombia KR Korea Republic SK Slovakia
C1 Custom1 KW Kuwait SI Slovenia
C2 Custom2 LB Lebanon ZA South Africa
CY Cyprus LU Luxembourg ES Spain
CZ Czech Republic MY Malaysia SE Sweden
DK Denmark MT Malta CH Switzerland
EG Egypt MX Mexico TW Taiwan
FI Finland NP Nepal TH Thailand
FR France NL Netherlands TR Turkey
DE Germany NZ New Zealand AE United Arab Emirates
GH Ghana NG Nigeria GB United Kingdom
GR Greece NO Norway US United States
HK Hong Kong OM Oman VE Venezuela
HU Hungary PK Pakistan ZW Zimbabwe
IS Iceland

[Roger Kallberg]

Not necessarily. What country is the router deployed in?

[medzeinmaaloum]

we are in Mauritania

[Roger Kallberg]

Try with FR for France.

[medzeinmaaloum]

voice-port 0/0/0

 cptone FR

 connection plar opx 4001

 impedance complex2

 description PSTN-FXO 45290216

 caller-id enable

in fact I tried the whole list, but always displays the same message : From Unknown Number

[Roger Kallberg]

Do you get any caller ID if you connect a regular analog phone to the circuit and make a call? If you don’t your telco is not sending you any caller ID.

[medzeinmaaloum]

The analog phone I have does not display numbers on its screen.
I tried to see the problem with the telephone provider (MAURITEL), but they do not know.
In Mauritania there is only one company (MAURITEL) with the wired telephone network, it has the monopoly.
Infact it is a Moroccan company.

[Roger Kallberg · Accepted solution]

If your analog phone has a display/screen and it doesn’t display any number your telco is not sending you caller ID. You need to work with your telco to get them to send this information. Only after you’re sure that you receive this from them you can expect to see it through your router.

[medzeinmaaloum]

It seems that the investigation with MAURITEL will take time, in this case I want to consider that the problem is solved on your part, thank you very much.

[Mohamed H. Abdelmotaleb]

1- Try to test if caller ID service is enabled or not by using an analog phone that has screen and supports caller ID.

2- run debug VPM signal on your router, and check caller id logs related.

3- run debug CCSIP messages to make sure that voice gateway sends the caller ID inside update SIP message 102 

4- provide output of show run all | sec voice-port 0/0/0

[b.winter]

@Mohamed H. Abdelmotaleb Why are you answering to already solved questions (not only this one)?

[Mohamed H. Abdelmotaleb]

@b.winter Sorry I was just trying to help, anyway, if you need me to delete my comment, please let me know.