NEC Univerge sv8500 Manual page 548

7. MCMG [SCA-4LC2COTA/MG-4LC2COTA]
7.1 General
7.1.1 What is MCMG?
MCMG has two functions, Media Converter and Media Gateway. Media Converter (MC) is an interface pro-
viding media conversion between internet protocol (LAN-side) and conventional voice data (the MC-connected
conventional terminal-side). Media Gateway (MG) is an interface between IP network and Analog PSTN line.
MC side <Analog Terminal Interface>
MC has four analog ports. Analog terminal and fax can be connected to the analog ports. Service conditions
are the same as Analog 2MC.
MG side <Analog PSTN Interface>
MG has two analog ports and connects IP Network and PSTN. Any IP terminal can originate and receive
call to/from analog PSTN line.
MC and MG usually work independently. In the case of some failure of MCMG, Power Failure Transfer (PFT)
connects C.O. lines and analog terminals directly and provides emergency line.
For the PFT service on the UG50, a station line connected to the PFT port cannot be used as a station line
Note:
for the system. Be sure to connect a terminal that can be used as telephone to the PFT port. Terminals such
as a FAX terminal are not allowed.
There are following two shapes for MCMG such as Card Type and Box Type.
ON
LINE OPERATION
100M LINK
MG MG0 MC0 MC2
PWR ALM
MG0 MG1 MC0 MC1
Ether
MC MG1 MC1 MC3
MCMG Card is mounted on 1U-MPC (Multi Purpose Chassis) module. One unit of 1U-MPC module can
Note:
accommodate a maximum of two cards. MCMG Card is mounted in the left slot in this figure.
Outerview of MCMG
CONSOLE
PFTRD
RESET
MC2 MC3
MUSIC
MCMG Card [SCA-4LC2COTA]
MCMG [SCA-4LC2COTA/MG-4LC2COTA]
VOL.2-295
Note
ON
OPERATION
100M LINK LINE
CONSOLE
MG MG0 MC0 MC2
PWR ALM
MG0 MG1 MC0 MC1 MC2 MC3
Ether
MC MG1 MC1 MC3
MCMG Box [MG-
4LC2COTA
PFTRD
RESET
MUSIC
]