iPECS eMG80 & eMG800 & UCP
Administration and Programming Manual Issue 1.6
207
3.3.12 Zone Data – PGM 436 - 441, 444
Zone data is a tool employed to easily manage the characteristics of groups of devices under the
control of an MPB. Often, devices are installed in groups with common characteristics. Such
devices can be grouped to a Zone to define common characteristics including Country Code,
DSCP, RTP packet handling, etc. Common attributes are defined at the device, Zone and Inter-
zone level. Device settings have priority over Zone settings, while Zone settings have priority over
system settings.
Generally, transport of RTP packets should be a peer-to-peer communication over either a LAN
or VPN. If iPECS devices are separated by a NAPT server or direct peer-to-peer communications
is not available, packet relay must be employed to assure communication. In packet relay, RTP
packets are received by a local VoIP channel (MPB or VOIB), which is under control of the MPB,
and the IP address is translated from a public to the device’s private address. The VoIP channels
implement a secure channel using IPSec protocol. Devices can be assigned as part of an “RTP
Relay group” to use the same VoIP channels to implement relay of RTP packets. Packet relay
groups also provide for conversion of multi-cast packets from the MPB to uni-cast and back again
at the group level to multi-cast. Note packet relay requires an MPB or VoIP channel be available
locally for each simultaneous call that requires packet relay. Programs 436 to 441 define device
zone assignments and zone configurations. These programs are available only in Web admin.
Holiday and Vacation assignments for each zone are defined in Program 444.
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