Re: OT : user in our Building can't heare the user in the other

Granted their CCMPub/Sub is on the same VLAN as the phones. If it's
on a different segment routing could be a factor.

On Wed, Jun 22, 2011 at 4:00 PM, Ryan West <rwest_at_zyedge.com> wrote:
> On Wed, Jun 22, 2011 at 16:54:07, Joe Astorino wrote:
>> Cc: ccielab_at_groupstudy.com
>> Subject: Re: OT : user in our Building can't heare the user in the
>> other Building
>>
>> Voice stream is RTP which is carried inside UDP.
>>
>> On Wed, Jun 22, 2011 at 4:50 PM, -Hammer- <bhmccie_at_gmail.com> wrote:
>>
>> > OK. Being a firewall guy I love when people blame the firewall. I'm
>> > not saying it's not the firewall but isn't RTP a TCP transport layer
>> > protocol? I'm not a voice guy so please don't bash me too much. Do
>> > the phones make independent connections (like a send and receive
>> > channel) to each other? Which part is stateless?
>> >
>> > -Hammer-
>> >
>
> Call setup doesn't seem to be an issue and if it's a Cisco CM solution, then UDP 16384 - 32767 range for RTP needs to be permitted through the firewall from side that can hear towards the side that cannot.
>
> -ryan
>
>
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Received on Wed Jun 22 2011 - 16:26:33 ART