Specifications

TD 92326GB
2009-03-10 / Ver. E
Installation and Operation Manual
VoIP Gateway
129
1 VoIP Gateway 1 is installed and configured as described in 17 Getting Started:
Installation Example on page 117.
2 Install a Relay Gateway license on every additional VoIP Gateway (VoIP Gateways
2....n).
3 VoIP Gateways 2....n are installed and configured the same way as VoIP Gateway 1
except the following settings:
• Select PBX > General and set PBX mode to “off”.
• Enter the IP address of VoIP Gateway 1 and a password for the PRI interface.
A password is needed since the PRI interface is supposed to register to an
external PBX Application. This setting is in junction with the “No of Regs w/o
Pwd.” on the PPX > General page. The password has to match the password on
the Gateway object in VoIP Gateway 1. See 17.4.4 Configure the PRI (ISDN)
Interface on page 124 and 11.4.4 Set up a Gateway Object to handle External
Extensions on page 76 for more information.
(The Gatekeeper Address (primary and secondary) and Gatekeeper ID are visible
in the PRI configuration when a Relay Gateway license is installed). See figure
118.
Figure 118. Gatekeeper address and password on additional VoIP Gateway
18.2.1 Load Balancing
When several VoIP Gateways are connected to one PBX, calls to the ISDN lines (PRIs) are
sent in a round-robin manor which means that multiple VoIP Gateways installed and
configured as described in chapter 18.2 Multiple VoIP Gateway Installation , are load
balancing calls automatically. The first call goes out on the first PRI and the second call
goes out on the second PRI and so on. This means that all PRI connections between the
PBX and the VoIP Gateways will have approximately the same amount of calls.