Nortel VoIP Gateway, Configuration Manual, Page: 33 / 220

Configuring the Protocol Definition parameters 33
Norstar VoIP Gateway Configuration Guide
Coders
1st Coder Select the first preferred codec for the VoIP Gateway.
This codec is the highest priority codec and is used by the VoIP Gateway whenever
possible.
Select the size of the Voice Packet used with this codec in milliseconds.
Selecting the size of the packet determines how many codec payloads are combined into
one RTP (Voice) packet.
2nd Coder Select the second preferred codec for the VoIP Gateway.
If the far end gateway cannot use the codec assigned as the 1st Coder, the VoIP Gateway
attempts to use this codec.
Select the size of the Voice Packet used with this codec in milliseconds.
Selecting the size of the packet determines how many codec payloads are combined into
one RTP (Voice) packet.
3rd Coder Select the third preferred codec for the VoIP Gateway.
If the far end gateway cannot use the codecs assigned as the 1st Coder or 2nd Coder, the
VoIP Gateway attempts to use this codec.
Select the size of the Voice Packet used with this codec in milliseconds.
Selecting the size of the packet determines how many codec payloads are combined into
one RTP (Voice) packet.
4th Coder Select the fourth preferred codec for the VoIP Gateway.
If the far end gateway cannot use the codecs assigned as the 1st Coder, 2nd Coder or
3rd Coder, the VoIP Gateway attempts to use this codec.
Select the size of the Voice Packet used with this codec in milliseconds.
Selecting the size of the packet determines how many codec payloads are combined into
one RTP (Voice) packet.
5th Coder Select the fifth preferred codec for the VoIP Gateway.
If the far end gateway cannot use the codecs assigned as the 1st Coder, 2nd Coder,
3rd Coder or 4th Coder, the VoIP Gateway attempts to use this codec.
If the far end gateway cannot use any of these five codecs, a VoIP connection cannot be
made.
Select the size of the Voice Packet used with this codec in milliseconds.
Selecting the size of the packet determines how many codec payloads are combined into
one RTP (Voice) packet.
DTMF and Dialing Parameters
Enable Automatic Dialing Select Yes to enable Automatic Dialing.
Select No to disable Automatic Dialing.
When you enable Automatic Dialing, a telephone number is automatically dialed as soon
you select one of the VoIP Gateway lines. To use the Automatic Dialing feature, you must
configure the Automatic Dialing Table. For information about how to configure the
Automatic Dialing Table, refer to
“Configuring the Automatic Dialing phone numbers” on
page 61 .
When you disable Automatic Dialing, you hear dial tone when you select one of the VoIP
Gateway lines. You can then dial the telephone number of the person you want to call.
Recommendations:
We recommend that you select No to disable Automatic Dialing.
Table 4 Protocol Definition parameters (Continued)
Parameter Description