iPECS eMG80 & eMG800 & UCP
Administration and Programming Manual Issue 1.6
534
4.4.13.1 Zone Number Overview
Selecting Zone Number Overview returns the data entry page.
Figure 4.4.13.1-1 Zone number overview
Zone data is a tool employed to easily manage the characteristics of groups of devices under the
control of an MPB/UCP. 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 system and
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, which is under control of the MPB/UCP, and the IP
address is translated from a public to the device’s private address. The VoIP channel implements
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/UCP to uni-cast and back again at the
group level to multi-cast. Note packet relay requires a VoIP channel be available locally for each
simultaneous call that requires packet relay.
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