Alcatel-Lucent omniacces-voip gateway User Manual

Page 5-226

Specify starting RTP/RTCP port number for voice switching daughtercard gateway (if sequen-
tial).

This command is used to specify the starting port number assigned to RTP/RTCP ports; when 
H.323 calls are made an RTP or RTCP port is opened for each call. The RTP port number 
should be an even number, and the RTCP port number should be one number greater than 
the RTP port value.

In order to accomplish this sort of controlled allocation, the port numbers are assigned start-
ing at the RTP port base value. Call Control Block (CCB) 0 will use ports numbered RTP port 
base and RTP port base + 1. CCB 1 will use the next two successive ports, etc. When the call 
is terminated, the CCB number will eventually be reused.

Definitions:
slot

Specifies the chassis slot number where VSM is installed, (e.g., 

).

Specifies the voice daughtercard position number, (e.g., 

).

Specifies starting RTP or RTCP port value from 1 to 65535, (e.g., 

). If dynamic port 

assignment is preferred, the RTP port base should be set to a value of 

; if dynamic port 

assignment is used, the requirements of the H.323 specification many not be met, as no 
attempt is made to assure proper numbering upon assignment.

♦ Syntax Notes ♦

Do not use commas when entering the starting value for RTP/
RTCP ports, (for example, 

 will return a syntax error 

message).

To use this command, the starting RTP/RTCP port mode for the 
gateway must be set to sequential via the 

command.

If the starting RTP/RTCP port mode for the gateway is set to 
dynamic, then this value is ignored.

Default:
The default value is 

.

Command Example: