List of terms Page 255 of 258
TPS
IP Phone Terminal Proxy Server. This server controls the connection of IP Phones. It resides on the Signaling Server with an emergency backup on the Voice Gateway Media Card.
UDP
Uniform Dialing Plan. Each location within the network is assigned a Location Code, and each telephone has a Directory Number that is unique within the network. Under the UDP, the SRG must include the location code in the Branch User ID (BUID). For details of other Numbering Plan options, see Communication Server 1000S: Overview
VoIP
Voice over IP trunk. This IP pathway between two system IP voice gateways allows the system to exchange telephone calls over the Internet.
WAN
Wide Area Network. A computer network that spans a relatively large geographical area. Typically, a WAN consists of two or more local area networks (LAN).
Computers connected to a wide area network are often connected through public networks, such as the telephone system. They can also be connected through leased lines or satellites. The largest WAN in existence is the Internet.
ZDP
Zone Digit Prefix. This is the number that the main office appends to a local SRG PSTN call dialed from an SRG IP Phone in Normal Mode. This number differentiates the call from a main office PSTN call dialed by the main office telephones. The ZDP routes the call through VoIP trunk to the SRG.
Main Office Configuration for Survivable Remote Gateway 50 Configuration Guide
