Cisco FXO port doesnt give a dialtone

[samuro]

Hello there
scenario: Cisco IP phone <-IP-> C3845 router <-FXO-> phillips PBX

FXO Port configuration
!
!
trunk group PBX
!
voice-port 0/1/0
trunk-group PBX 1
!
voice-port 0/1/1
trunk-group PBX 2
!
voice-port 0/1/2
trunk-group PBX 3
!
voice-port 0/1/3
trunk-group PBX 4
!

Then the dialpeer is defined as

dial-peer voice 999 pots
trunkgroup PBX
destination-pattern [123]..
forward-digits all
!

The outgoing calls via phillips are ok. However, when dialing in, there is no dialtone to allow one to enter extension number. please advice

Sam

 

[whykap]

An FXO port does not provide dialtone.
So from the 3845 to the Philips it works.
From the philips to the cisco call flow is as follows:

Philips phone goes off hook.
Gets internal dial tone from the Philips pbx.
user dials and access code configured in the philips which accesses the FXO port, then dials the extension they want to reach on the cisco side.

Now you are missing a command to point the incoming call to the correct location. It would be like this:
voice-port 0/1/0
trunk-group PBX 1
connection plar XXX

where xxx is the cisco phone you want to ring.
Follow the same for each voice-port

 

[samuro]

Thanks for your reply.

Connection plax XXX directs the phone to extension XXX which is not what am looking for. What i want is when someone call the FXO port to receive a dialtone to allow them to enter dtmf extension, say XXX, where XXX is a dial-peer or valid ephone

Any idea on how to?

Sam

 

[whykap]

Ok. you will need an analog DID card to do that. An FXO card does not receive DTMF on inbound calls. it just looks for ring voltage. Outbound it can outpulse DTMF but not the way you are looking to do it.
So what you need for that is an VIC4-FXS/DID module on the cisco end.

Do you have a voice mail attached to the cisco phone system? If so send all calls to voice mail, record a greeting to enter the extension number they want to reach and then vm can route to the correct person. That is an ugly workaround if you do not want to get a did module.

 

[samuro]

Thanks
But it is very strange. the last time I tested the same router i could clearly get the dialtone and able to dial cisco extension before someone override my unsaved configs.

Is there any VIC4-FXO/DID modules?

Unfortunately i dont have vm system installed

Sam

 

[whykap]

An FXO port will not provide dialtone an FXS port will.
Is this the exact same router with the same hardware as before you lost the config? I am not sure how that would be possible.
There is not such module as the one you mentioned.

 

[rassoulghaznavi]

you are able to connect to FXO from outside not to get dial tone but with a tcl application you can get some commands or numbers from caller, or allow him to make a call.
Refer to tcl programming at Cisco web site:

http://www.cisco.com/en/US/products...gramming_reference_guide09186a00800e9ab8.html

Rassoul - Network/system engineer
CCNP
CCIP
CCNAV
IIUC2
LPI

http://www.net-grp.com