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New Member

FXO Unknown number


I have cisco router 2921 with 12 fxo ports (VIC2-4FXO), any call coming form PSTN its displaying (From Unknown number),i try all the cptone and here is the configuration under the voice-port.

voice-port 0/1/0

supervisory disconnect dual tone mid-call

timeouts call -disconnect 5

timeouts wait-release timeout 5

caller-id enable

caller-id alerting ring 2

cptone SA

any other configuration please advice.


Ali Nasser

New Member

Re: FXO Unknown number

Ali, Did you subscribe for caller-ID from your service provider?

New Member

Re: FXO Unknown number

Hi Allan,

yes, i have caller id in the line and i test it in analog phone i can see the number in 1st ring.


New Member

Re: FXO Unknown number

Try to use

caller-id alerting ring 1

Hall of Fame Super Gold

Re: FXO Unknown number

Which exact IOS are you using? the DSP code is often buggy ior flaky in CLID support.

New Member

Re: FXO Unknown number

Hi Peolo,

Version 15.0(r1)M6.


Hall of Fame Super Gold

Re: FXO Unknown number

That is rommon. Post the full otutput of "show ver".

New Member

Re: FXO Unknown number

Hi paolo,

Here is the "show ver"

BR101#show version
Cisco IOS Software, C2900 Software (C2900-UNIVERSALK9-M), Version 15.0(1)M3, REL
Technical Support:
Copyright (c) 1986-2010 by Cisco Systems, Inc.
Compiled Sun 18-Jul-10 03:32 by prod_rel_team

ROM: System Bootstrap, Version 15.0(1r)M6, RELEASE SOFTWARE (fc1)

BR101 uptime is 3 days, 21 hours, 23 minutes
System returned to ROM by power-on
System restarted at 15:50:35 UTC Tue Nov 2 2010
System image file is "flash0:c2900-universalk9-mz.SPA.150-1.M3.bin"
Last reload type: Normal Reload

This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at: you require further assistance please contact us by sending email to CISCO2921/K9 (revision 1.0) with 471040K/53248K bytes of memory.
Processor board ID FHK1431F0JG
3 Gigabit Ethernet interfaces
1 Serial(sync/async) interface
2 terminal lines
1 Virtual Private Network (VPN) Module
12 Voice FXO interfaces
1 cisco Integrated Service Engine(s)
   Cisco Wide Area Application Services Software 4.1.5c (b17 Dec 21 2009 15:41:2
4) in slot 1
1 Internal Services Module (ISM) with Services Ready Engine (SRE)
   Cisco Unity Express 7.1.7 in slot 0
DRAM configuration is 64 bits wide with parity enabled.
255K bytes of non-volatile configuration memory.
254464K bytes of ATA System CompactFlash 0 (Read/Write)



License Info:

License UDI:

Device#   PID                   SN
*0        CISCO2921/K9          FHK1431F0JG

Technology Package License Information for Module:'c2900'

Technology    Technology-package          Technology-package
              Current       Type          Next reboot
ipbase        ipbasek9      Permanent     ipbasek9
security      securityk9    Permanent     securityk9
uc            uck9          Permanent     uck9
data          None          None          None

Configuration register is 0x2102


Hall of Fame Super Gold

Re: FXO Unknown number

You are running current software. Engage the Cisco TAC for further support.

Cisco Employee

Re: FXO Unknown number

Can u provide following debugs for one call ?

deb vpm sig

deb voip ccapi inout

Pl. do following before enabling the debugs...

Router(config)# service sequence
Router(config)# service timestamps debug datetime msec
Router(config)# logging buffered 20000000 7
Router(config)# no logging con
Router(config)# no logging mon
Router(config)# voice iec syslog

Router# cler log

Enable above defbugs and place the test call....

Router# term len 0

Router# sh logg

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