1-9
HOLD
SPEAKER
XFER
CONN
DND
PAGING
REDIAL
SPEED
SCROL
L
VOLUME
Legacy PBX
subscriber A
Head Office
SMG-400
Tandem Gateway
SIGK(Gatekeeper)
Internet
HOLD
SPEAK
ER
XFER
CONN
DND
PAGING
REDIA
L
SPEED
SCROL
L
VOLUME
VoIP
VoIP
SMG-400
subscriber B
Branch Office
Standalone Gateway
Media Gateway
SMG- 400
PWR
L1
L3
L2
L4
TX
OPER RX
P1
P3
P1
P3
P2
P4
P2
P4
LAN
STATUS
LOOP
SLC
Media Gateway
SMG- 400
PWR
L1
L3
L2
L4
TX
OPER RX
P1
P3
P1
P3
P2
P4
P2
P4
LAN
STATUS
LOOP
SLC
Standalone Gateway Mode
The SMG-400 can be run in the standalone gateway mode. It connects a telephone to a SLC port
on the SMG-400 and uses the system as a VoIP Gateway with internal subscribers.