iPECS eMG80/100& eMG800 & UCP & vUCP
Administration and Programming Manual Issue 2.5
348
4.4.13.4 Access & Page Relay – PGM 438
Selecting Access & Page Relay returns the Access & Page RTP packet relay data input page. Enter the
Sequence number Range (refer to section 4.4.1.4 System & Device IP Address Plan - PGM 102 & 103) and
click [Load]to define packet relay characteristics for Paging between Zones. Click the [Save] button after
changing Value.
Enter Device/GW sequence Range: eMG80/100: 1-300 / eMG800: 1-2890 / UCP: 1-3688
Figure 4.4.13.4-1 Zone Page RTP Packet Relay
iPECS protocol employs multi-cast to send RTP packets to multiple devices at one time. This improves
efficiency and lowers traffic by sending a single multicast packet to multicast group members. In particular,
paging employs this multi-cast technique.
However, since multi-cast is not commonly supported outside of the LAN, uni-cast must be used to transport
such signals between routers. At the receiving Zone, a local VoIP channel receives the uni-cast signal from the
controlling MPB. The VoIP channel then converts the packet address to a multi-cast signal for delivery to
devices in the same Zone RTP Relay Group.
The device can be configured to relay RTP packets for
paging to other zone members, Paging Relay.
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