IP Phone on Home VPN

[Depthless]

Hello,

I have a VPN connection between my Cisco 7941 IP Phone and my Cisco Call Manager Express system at my office.

The phone is able to register, it can receive and place calls, but when in a call session I can not hear any audio and the other end can not hear me.

What is odd is that if I dial an extension of someone in the office, they are able to hear my voice, but I can't hear theirs.

Also, if a button is pressed on either end of a call, the tone makes it through. Any suggestions as to what would cause this?

Thanks

 

[brianinms]

What type of vpn are use using?

 

[Depthless]

OpenVPN

 

[brianinms]

I think it has more to do with the transport then the actual phone configuration. Have you plugged the phone into the network at the office and tried it there?

 

[Depthless]

Yes, it works there.

 

[brianinms]

Then something isn't kosher with your VPN configuration.

 

[Depthless]

What could be wrong if I'm able to place calls and receive them? I don't understand. Is the SIP protocol handled differently?

 

[brianinms]

If they can hear you, but you can't hear them .... I would say the packets aren't getting back to you from the work side. I assume you have a linux box on each end running this OpenVPN software and using it as a gateway?

 

[Depthless]

Another thing I don't understand, is if I call a phone that is not in the office from the phone at my house. I can't hear audio either way.

 

[Depthless]

What would the command be to add a route? I need all traffic directed toward 10.0.4.0/24 to go through 10.0.2.50.

That's my problem. The phone system is able to ping one end of the VPN but it doesn't know where the phone is.

 

[brianinms]

Command in the cisco router?

ip route 10.0.4.0 255.255.255.0 10.0.2.50

 

[Depthless]

so i log in and just type that?

i'm sorry i'm not familiar at all with a cisco terminal.

i can telnet in, and i know the user/pass, but nothing else.

 

[brianinms]

You should get something like ...

router#
router#config t
router(config)#ip route 10.0.4.0 255.255.255.0 10.0.2.50
router(config)exit
router# write mem

 

[Depthless]

will try tomorrow. if this works, i love you.