3300 Mitel SIP connection to Cisco Call Manager

[Ceaserx]

Hi,

I recently configured a SIP connection to a Cisco Call Manager sitting on a 2800 switch.

It works fine on all 5212's, 5302's and 5330's but i have one way speech on the IP consoles(5550). The CCM end can hear the receptionist but there is no incoming voice on the 5550.

This is very bizarre as all other phones work perfectly. Has anybody experienced this.

The Mitel 3300 MXE is on version 9ur3.

 

[UncleRalph]

Is the console on the same subnet as the other phones?

Ralph

 

[Ceaserx]

They have about 10 voice subnets throughout the building, so the 4 consoles will have the same subnet as phones in it's surrounding area.

 

[Mitelpassion]

gateway on the console keypad the same as the other phones?
the pc in the same subnet as the keypad?

do you have vlans configured..
one way audio mostly has to do with network gateway's or endpoints streaming to the wrong IP addresses...

 

[Ceaserx]

i have now tested a whole bunch of different things.

The Ip console is on a a voice subnet and the pc is on a data subnet. I can ping everywhere i need to from the pc.

I have even tested a 5330 on the same point, same subnet and it has two way speech.

I have even taken the ip console to another floor and tested it on that voice vlan/subnet and still have one way speech.

Like mentioned before, they have 4 x 5550 IP Consoles and all of them have one way speech to this Cisco device using a SIP trunk.

 

[Mitelpassion]

my guess here is that you'll have to do a trace and see where things go missing.

I have a suspision that the audio is being streamed to the IP of the PC for the consoles and not the console itself, hence the one way audio.

this is just a guess - when you look at the ALL IP phone form under maintenance and diagnostics, you'll see the console reports the PC's IP and not the actualy keypad when the device is in service (this is from what I recall).

again run traces and see where this is going missing.

 

[drsmith45]

I would look also in DHCP Static IP form for the consoles

and check if they have any firewalls turn on at the four PC's

is the Cisco call manager a cluster element ?

If the 3300 ICP is part of a cluster, any IP Console must be assigned a Static IP Address.

 

[Mitelpassion]

put both the PC and console in the voice vlan.
easiest way is to configure the switchport to be only a voice port.

see if one way audio persists..

 

[Ceaserx]

We have now tested with the pc in the same voice vlan as the ip console and still have the one way speech. The cisco call manager express is set to use codec G729R8.

I will be doing some wireshark traces now, can someone help look at them?