1-8
Chapter 1
Overview
HOLD
SPEAKER
XFER
CONN
DND
PAGING
REDIAL
SPEED
SCRO
LL
VOLUME
Legacy PBX
subscriber A
Head Office
Tandem Gateway
SIGK(Gatekeeper)
Internet
HOLD
SPEAKER
XFER
CONN
DND
PAGING
REDIAL
SPEED
SCROLL
VOLUM
E
VoIP
VoIP
HOLD
SPEAKER
XFER
CONN
DND
PAGING
REDIAL
SPEED
SCROLL
VOLUME
subscriber B
Branch Office
HOLD
SPEAKER
XFER
CONN
DND
PAGING
REDIAL
SPEED
SCROLL
VOLUME
Tandem Gateway
SMG-400
Media Gateway
SMG- 400
PWR
L1
L3
L2
L4
TX
OPER RX
P1
P3
P1
P3
P2
P4
P2
P4
LAN
STATUS
LOOP
SLC
VoIP Network Configuration Using
SMG-400
A VoIP network can be constructed using SMG-400, PBX, and KTS as the following figure shows.
Tandem Gateway Mode
The SMG-400 can be run in the tandem gateway mode. It connects the SMG-400 to PBX or KTS,
and uses the SMG-400 as a gateway without internal subscribers.