
70 Chapter 4 VoIP Trunk Configuration
P0937663 02.0
communications in one direction are more important than in the other direction, you can set up
asymmetrical thresholds.
For information about using the QoS monitor, see “Quality of Service Monitor” on page 77.
Enabling PSTN fallback
To enable PSTN fallback:
1 Open Services, IP Telephony and click on H.323 trunks.
2 Click the Fallback to Circuit-Switched menu and select Enabled-All or
Enabled-TDM-only. Enabled-TDM-only enables fallback for calls originating on TDM
telephones. This is useful if your IP telephones are connected remotely, on the public side of
the Business Communications Manager network, because PSTN fallback is unlikely to result
in better quality of service in that scenario.
Incoming call configuration
This section explains how to receive incoming calls placed over a VoIP network. For information
about setting up your Business Communications Manager to place outgoing VoIP calls, see
“Outgoing call configuration” on page 56.
Assign a target line to the DN
A target line routes incoming calls to specific telephones (DNs) depending on the incoming digits.
This process is independent of the trunk over which the call comes in. The mapping of the target
lines involves two steps:
• The incoming digits (e.g. 321) are mapped to a target line (e.g. 241) by setting the Received
Number to the incoming digits (e.g. to line 241 to 321).
• The target line is mapped to a telephone by assigning the line (241) to the telephone.
For a detailed explanation of target lines, see the Business Communications Manager 2.5
Programming Operations Guide.
To assign a target line to a DN:
1 In Unified Manager, open Services/Telephony Services/System DNs/Active Set DNs.
2 Choose the DN of the telephone where you want the line to be directed.
3 Choose Line Access/Line assignment and click the Add button.
4 Enter the number of an available target line (241-412). Click the Save button.
5 Click on the line number you just created. The DN/Line screen appears in the right frame.
6 Ensure that Appearance type is set to Appr & Ring.
7 Go to Services/Telephony Services/Lines/Ta rg et L i n e/<Target line number from step 4>.
Komentáře k této Příručce