Nortel ISDN Signaling Link, Description, Installation And Operation

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Install and configure ITG ISL Trunk node Page 203 of 378
ITG Trunk 2.0 ISDN Signaling Link (ISL) Description, Installation and Operation
6 To turn off a codec, click on the codec and uncheck the checkbox.
7 To change the preferred order of codec selection, for outgoing calls, if
required, select the codec and click the Move Up and Move Down
buttons. ITG Trunk node requests the codec at the top of the list first
on outgoing calls.
8 To enable Voice Activity Detection for silence suppression, check the
appropriate box. To disable Voice Activity Detection for silence
suppression, uncheck the box.
Change default DiffServ/TOS value for Control and Voice
1 Enter the DiffServ/TOS value for Control and Voice, if required, to
obtain better QoS over the IP data network (LAN/WAN). Do not
change from default value of 0 unless instructed by IP network
administrator.
The Type of Service (TOS) byte or Differentiated Service (DiffServ)
code point determine the priority of the control and voice packets in the
network router queues. The values entered in these two boxes must
be coordinated across the entire IP data network. Do not change them
arbitrarily.
DiffServ/TOS values must first be converted to a decimal value of the
DiffServ/TOS byte in the IP packet header. For example, the 8-bit TOS
field value of 0010 0100 which indicates “Precedence=Priority”;
“Reliability=High” is converted to a decimal value of 36 before being
entered in the Control or Voice fields.
2 Click Apply.