
Chapter 6 Setting up VoIP trunks for outgoing calls 107
IP Telephony Configuration Guide
Outgoing call configuration
This section explains how to set up your system to place calls through VoIP trunks. The system at
the other end of the call must be set up to receive VoIP calls.
Outgoing call configuration details are explained under “Managing H.323 and SIP trunks”.
An example of an outgoing call over VoIP trunks is provided under “PSTN call to remote node”
on page 109.
Managing H.323 and SIP trunks
The Business Communications Manager uses the same type of records for IP trunks that it creates
records for physical lines and for target lines. Found under Services, Telephony Services, Lines,
VoIP lines, these records allow you to set some parameters about how the line will work.
When you have determined how you are going to split your trunks between H.323 and SIP trunks
(“Counting IP trunks” on page 87), you can configure the lines and put them into line pools, which
you use to create routing configurations.
Note that the H.323 lines start counting from the lowest position on the 60-line list, and the SIP
lines start from the top.
Once you have created the line pools, you assign them to the telephones, as you would any other
line pool.
QoS Monitor Disabled
Enabled
Choose Enabled, if you intend to use a fallback PSTN line.
Ensure that QoS Monitor is also enabled on the remote
system.
Otherwise, choose Disabled.
For information about QoS, refer to “Quality of Service
Monitor” on page 127
Transmit Threshold read-only
Receive Threshold read-only
Destination Digits <numeric>
(could be the
same as the
destination code
for the route to
this system)
Set the leading digits which callers can dial to route calls
through the SIP trunk. Ensure that there are no other
destination SIP endpoints currently using this combination of
digits.
If multiple leading digits map to the same destination,
separate them with a space. For example, 7 81 9555.
These numbers are passed to the remote system as part of
the dialed number.
Table 26 Adding SIP Address Book records (Continued)
Field Value Description
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