Specifications

Chapter 13 - Signalling Protocol Configuration – MGCP Administration Manual (SIP/MGCP Version)
AT-VP504E FXS 110
Services
Provided
While the AT-VP504E FXS uses the MGCP protocol, it uses the
services provided by the Call Agent. See your Call Agent
documentation for more information.
Setting up Call
Agents Informa-
tion
The Call Agent is the server that sends the proper information to the
AT-VP504E FXS unit and manages calls from and to the unit.
DHCP vs. Static
Configuration
The Call Agent information can be assigned through a DHCP server or
set statically. The AT-VP504E FXS can use two Call Agents: the
primary and secondary.
To use DHCP-assigned information:
1. In the MGCP MIB, locate the mgcpConfigurationCallAgent
UseDhcp
variable (under mgcpConfigurationCallAgent
Group
).
This variable defines whether the AT-VP504E FXS must ask
for its Call Agent settings through a DHCP server or not.
2. Set the mgcpConfigurationCallAgentUseDhcp variable to
1=DHCP.
You can query the Call Agent’s IP address and Port number
assigned by the DHCP server in the following variables:
• mgcpConfigurationCallAgentDhcpPrimaryAddress
• mgcpConfigurationCallAgentDhcpPrimaryPort
Number
• mgcpConfigurationCallAgentDhcpSecondaryAddress
• mgcpConfigurationCallAgentDhcpSecondaryPort
Number
3. Set the DHCP Vendor Specific code of the Call Agents in the
mgcpConfigurationCallAgentDhcpPrimaryVendorSpecificCo
de
and mgcpConfigurationCallAgentDhcpSecondaryVendor
SpecificCode
variables .
These codes can be any number between 0 and 254. The
default value for the Primary Call Agent is 206, while the
default value for the Secondary Call Agent is 207.