Nortel 1000 Description, Installation And Operation Manual page 405

Provisioning IP Trunk 3.01 (and later) in OTM 2.1 (and later)
Figure 97
New ITG Node – DSP Profile tab - General sub-tab - Profile 1
The Control packets and Voice packets can be assigned a different
DIFFSERV/TOS value to assist in QoS in the IP network. Only change
these values if it is found to be necessary and ensure that all network
routers have been updated with the new TOS value. For more information
see "IP Trunk 3.01 (and later) DiffServ support for IP QoS" on
13 Select the applicable DSP Profile information. There are three choices in
the DSP Profile drop-down list, as seen in Figure 97. Click Apply.
CAUTION
The Media Card 32-port trunk card does not support
Profile 3. If Profile 3 is provisioned, the card is unable to
make or receive calls.
IP Trunk Description, Installation, and Operation
Page 405 of 644
page 172.