User guide

System Administrator’s Guide – Release 7.5
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Revised: April 9, 2013
Page 147
3. Forward the required IP ports through the firewall at the remote site, per the
table below. 0.
Port
Type
Global Local Protocol IP Address
BLF 2088 2088 UDP 192.168.2.7
SIP 5060 5060 UDP 192.168.2.7
SIP 5061 5061 UDP 169.168.2.8
RTP 16384 - 16393 16384 - 16393 UDP 192.168.2.7
RTP 16394 - 16403 16394 - 16403 UDP 192.168.2.8
Note: Map the BLF port for one of the remote devices. The device that gets the BLF
messages from the server will forward the BLF information to every other Allworx
device in that subnet.
17.1.4 Phones at Different Remote Sites, Each with a Firewall
This case is very similar to Multiple Remote Devices behind the Same Firewall on
page 146. The difference is doing the mappings on each site’s firewall. Be sure to map
the correct RTP port range for the device that is on the configured firewall. In addition,
map the BLF port (2088) for one device on each firewall.
17.1.5 Remote Phones Cannot Receive Pages
While regular calling and intercom calling works fine, paging remote phones does not.
Sending pages from the remote phone works but the zoned nor hear the overhead
pages at the remote phone.
In order to enable paging to a remote phone, a VPN must be set up between the
Allworx server and the remote phone. Below describes the Allworx server settings
changes. This document does not cover the steps for configuring the site’s firewall for
the VPN because of the variations.