QoS Marking - Voice Gateway

Unanswered Question
Oct 5th, 2009


We are implementing QoS for IP Telephony infrastructure. The IP Phones mark the packets for signalling and RTP. This would be for the traffic originating at the phone towards the voice gateway.

What and how should the marking happen for a call from PSTN towards the Ip phone? Is there separate marking to be done on the voice gateway or the switches.


I have this problem too.
0 votes
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 4 (1 ratings)
Dennis Fogler Mon, 10/05/2009 - 17:39

In your gateway design, are you using MGCP or H.323?

If you are using MGCP you can set the QoS Marking on the gateway configuration page in Communication (call) Manager.

If you are using H.323 you can set the QoS on the "voip" or destination leg dial-peer.

For Example:

dial-peer voice 1200 voip

destination-pattern [1-2]...

ip qos dscp cs3 signaling

ip qos dscp ef media

session target ipv4 xx.xx.xx.xx

csshenoy80 Tue, 10/06/2009 - 03:29

the duplicate post was created while updating the subject. Not intensional :)


This Discussion