Dialogic 4000 Series SU4.1 Manual de usuario descargar pdf (Pagina 96)

Dialogic 4000 Media Gateway Series SU4.1 Reference Guide

Information about Call Processing

 Each route can point to several destinations, between which Diva SIPcontrol chooses

according to the following settings (in decreasing order of importance):

o Availability (destination enabled)

o Alive state of destination (if enabled to be verified)

o Priority (Master/Slave)

o Channel load quota (a factor calculated by comparing used vs. total supported

channels)

 For each call, only one route is chosen. Even if another route also matches the call

criteria, only the first matching route is ever evaluated. Therefore, default routes

should be created carefully and located at the end of the routing table, if

appropriate.

 Load balancing/failover is only performed between the destinations of a single route.

 Routes without any conditions always match (as long as the source endpoint is listed

in route sources).

Emergency Calls

In many environments, certain numbers, e.g., 110/112 in Germany or 911 in the U.S., have

to be handled differently from others. For example, they might need to be dialed without

any access digit.

This can be achieved by creating an additional route from any configured SIP peers to one

or more PSTN interfaces and setting the called address condition to the emergency

number(s). The route should be placed at the top position in the list. Should there be a

dialplan and/or address map configured for the respective PSTN interfaces, it may be

necessary to add another regular expression to the address maps of the interfaces to handle

those calls.

Routing Conditions

Diva SIPcontrol organizes the conditions of a route in a list. Each list entry consists of

different expressions for called, calling, and redirected address. The route matches only if all

three expressions simultaneously match the respective call addresses. Empty expressions

are considered to match, so there is no need to add wildcards into unused expressions. As a

result, if a call should match either a called address or a calling number, two list entries

have to be created, with called expression in the first and calling expression in the second

row. If both have to match concurrently, both expressions have to be entered into the same

list entry.

Routing Examples

This section describes the configuration of four possible routing scenarios:

 Direct Routing between One PSTN Interface and One SIP Peer

 Connecting Two SIP Peers to Two PSTN Interfaces Exclusively

 Connecting Two SIP Peers to the Same PSTN Interface

 Load Balancing or Failover between Two SIP Peers

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Dialogic 4000 Series SU4.1 Manual de usuario Pagina 96