User guide

System Administrator’s Guide – Release 7.5
______________________________________________________________________________________________
Toll Free 1-866-ALLWORX • 585-421-3850 • www.allworx.com
Revised: April 9, 2013
Page 148
On the Servers > VoIP > Modify Server page of the Allworx server, there are three
parameters used to configure where the server transmits zoned pages:
• Paging Base IP Address – This is the multicast base IP address used by
the system. Each paging zone uses the base address plus an offset.
Zone 0 (the overhead zone), uses an offset of 0, zone 1 uses an offset of
1, etc. For example, if the base address were set to 239.255.10.0, then
zone 2 would use multicast IP address 239.255.10.2.
• Paging Port – This is the UDP port number that the packets are sent to.
All zones use the same port number, but each has its own multicast IP
address.
• Paging Max Hop Count – This value controls the time-to-live (TTL) count
in the IP header of all paging UDP/RTP frames. Typically, this value is set
to 1 so that the packet will not be sent beyond the local subnet. However,
if you have multiple subnets with phones on them, this value will need to
be increased.