voip questions about QOS and ip trunking

[carl_townshend]

Hi all

We hav been installing a new IP phone system, the guy who came to connect the old phone system to our new IP pbx says that they connect va IP trunking, what is this?

Also can I configure any QOS for voip on my asa firewalls ?

cheers

Carl

[Giuseppe Larosa]

Hello Carl,

in the IPT world they use terms from the PSTN:

a trunk is a link between two PBXs or between a PBX and a Central Office switch that is able to carry multiple circuit switched conversations. (typically TDM multiplexing with digital trunks that are the E1 and T1 indeed).

When a trunk link traffic is carried over IP they say they are doing ip trunking but this is not referred to vlan trunking like ISL or 802.1Q.

about QoS and ASA: yes you can

see

http://www.cisco.com/en/US/docs/security/asa/asa80/configuration/guide/qos.html#wpxref99006

Hope to help

Giuseppe