Dialogic 4000 SERIES Manual do Utilizador descarregar pdf (Página 69)

How Calls Are Processed

Page 69

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, as described below

• C

onnecting Two SIP Peers to Two PSTN Interfaces Exclusively, as described on page 70

• Connecting Two SIP Peers to the Same PSTN Interface, as described on page 71

• Load Balancing or Failover between Two SIP Peers, as described on page 71

Direct Routing between One PSTN Interface and One SIP Peer

If you choose to route all calls from the PSTN to the same SIP peer, and calls from that SIP peer to the PSTN,

configure the parameters as follows. For this configuration, no address rewriting is done:

1. Under PSTN Interfaces, enable and configure all PSTN interfaces connected to a PBX. Confirm each dialog

box with OK.

2. Under SIP Peers, create a SIP peer with the necessary settings, and make sure that the option Default

peer for received SIP calls is enabled. Confirm with OK.

3. Under Routing, create Route 1 and do the following:

• Select each required PSTN interface as a source peer.

• Select the SIP peer configured in Step 2 as a Master destination.

• Set the Number format field to Unchanged.

• Confirm with OK.

4. Under Routing, create Route 2 and do the following:

• Enable the SIP peer configured in Step 2 as a source peer.

• Enable all required PSTN interfaces as Master destinations.

•Set the Number format field to Unchanged.

• Confirm with OK.

5. Save the configuration in the main configuration interface.

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Dialogic 4000 SERIES Manual do Utilizador Página 69