QoS for CUE CCM Integration

Posted: July 20, 2006 by cciestudy in Cisco Unity Express, QOS

One of the current limitations is that the JTAPI (CTI-quick buffer encoding [QBE]) signaling packets are unmarked (TOS = 0) when the Cisco Unity Express AIM transmits them. In order to correct this, use an access control list (ACL) on the router that has the Cisco Unity Express AIM installed to mark and prioritize the traffic.

The JTAPI signaling from the Cisco CallManager is correctly marked with a differentiated services code point (DSCP) value of CS3.

The JTAPI signaling protocol uses TCP port 2748. Dedicate 20 kbps per Cisco Unity Express site for this traffic.

All Real-Time Protocol (RTP) audio traffic from the Cisco Unity Express AIM or the IP phone is correctly marked with a DSCP value of 0xEF.

This example shows a sample configuration for this on the router where a.b.c.d is the IP address of the Cisco Unity Express AIM:

access-list 101 permit tcp host a.b.c.d any eq 2748
class-map match-all cti-qbe
 match access-group 101
policy-map cti-qbe
 class cti-qbe
 set dscp af31
 bandwidth 20
interface Serial0/1
 service-policy output cti-qbe
  1. Martin Chmelik says:

    There should be :
    interface Serial0/1
    service-policy INPUT cti-qbe

    Traffic is comming from CUE module IN to the router and will be leaving OUT of the router on different interface.

  2. Wissam says:

    shouldn’t be
    service-policy input cti-qbe

    what do you mean by s0/1 it is connected to what?

    Good day

  3. this information very nice.Voice IP Comms are the Premier Provider of business telephone systems in the UK.

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