NEC Univerge sv8500 Manual page 1260

14. MG(PRI) (1.5M) [SCA-24PRIA/MG-24PRIA]
14.1 General
14.1.1 What is MG(PRI) CARD/MG(PRI)?
MG(PRI) is a media gateway between ISDN network and IP network to provide an efficient network through
interaction with the Telephony Server. MG(PRI) is controlled by the Telephony Server, and a variety of services
can be performed.
The MG(PRI) has two types: "MG(PRI) Card [SCA-24PRIA]" for Card Type and "MG(PRI) Box [MG-
24PRIA]" for Box Type. The MG(PRI) Card [SCA-24PRIA] can also be accommodated in Multi Purpose Chas-
sis (MPC). Those ones are in the following:
100M LINK B D
ON
PWR ALM LINE LB
Ether LINE
MG(PRI) (1.5M) Card [SCA-24PRIA]
The general structure of this equipment is shown in the diagram below.
MG(PRI) can operate in either of two modes, SIP mode or Proprietary Protocol mode. When MG(PRI) works
in SIP mode, the controlling signal between the Telephony Server and MG(PRI) adopts Session Initiation Pro-
tocol (SIP). Controlling signal and voice packets are encrypted to ensure security feature.
CONSOLE
MUSIC
RESET
Proprietary Protocol SIP
mode mode
Internal PHI-PRI Internal PHE
MPH
Note 2
Note 1
IP Terminal
PH to control this operation
MG(PRI) (1.5M) [SCA-24PRIA/MG-24PRIA]
PWR
MG(PRI) (1.5M) Box [MG-24PRIA]
SP-PHI
Telephony Server
Voice Data
MG(PRI)
Card/Box
PSTN
(ISDN)
Analog Telephone
VOL.2-1007
B D
100M LINK CONSOLE
ON
MUSIC
ALM LINE LB RESET
Ether LINE
Signaling Control Data