Un-Routable Calls; Voice Over Ip Address Translation - Dialogic DMG1000 User Manual

1.2.1

Un-Routable Calls

A call is un-routable by the Media Gateway if the unit is unable to route the call to the other
network. This may occur if there is insufficient destination address information to determine a
destination for the call, or if there are not enough free resources on the Media Gateway to route the
call. The Media Gateway provides a number of different ways to handle these conditions in order to
insure that no calls are dropped or not completed.
1.2.1.1 IP to Switch Calls
There are a few circumstances where an inbound IP call may not be routed to the Switch network.
They are the following:
• No available Switch Ports
There are no available Media Gateway Switch ports on which to carry the call.
–
• Invalid or No Switch destination address specified
The IP call information does not contain a valid E.164 destination address for the Switch
–
network.
The administrator may specify a default destination IP address that is to receive any inbound IP
calls that cannot be routed to the Switch. If the administrator specifies a default destination IP
address for un-routable IP calls, then any inbound IP call that cannot be routed to the Switch
network is forwarded to the specified default IP address. If the administrator does not specify a
default destination IP address, then any inbound IP call that cannot be routed to the Switch is
rejected by the Media Gateway.
1.2.1.2 Switch to IP Calls
There are a few circumstances in which an inbound Switch call may not be routed to the IP
network. They are the following:
IP destination not configured.
•
• IP destination not present.
The administrator may specify a default destination Switch extension that is to receive any inbound
Switch calls that cannot be routed to the IP network. If the administrator specifies a default
destination Switch extension for un-routable Switch calls, then any inbound Switch call that cannot
be routed to the IP network is transferred to the specified default Switch extension. If the
administrator does not specify a default destination Switch extension, then any inbound Switch call
that cannot be routed to the IP network is ignored by the Media Gateway.
1.3

Voice over IP Address Translation

The Voice over IP (VoIP) Address Translator provides network services to H.323 or SIP devices
such as the Media Gateway. H.323 devices register with the VoIP Address Translator to send and
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Dialogic 1000 and 2000 Media Gateway Series User's Guide — September 2007
Dialogic Corporation
Overview
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