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2-3
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❺
❺
❺
DIP Switch
Switch
Switch
Switch
Switch
Default
Default
Default
Default
Description
Description
Description
Description
S1
OFF
Set to ON state during an offline test.
MGCB Part
MGCB (Media Gateway Control Board) part controls the entire operation of the SMG-400 system.
Three memories are installed in the MGCB part.
☞
512KB Flash Memory : Booting program is stored.
☞
8MB Flash Memory : Database used by the SMG-400 system is saved in.
☞
16MB SDRAM : The place where the system software is run.
The features and functions of the MGCB part are as follows.
y
Operational control of installed boards in the system
y
Detection and generation of 16 DTMF
y
Generation of 7 dial tones
y
Offering 256x256 channel time slot
y
Offering a 10/100Mbps LAN port, and RS-232C SIO port
VoIP Part
The VoIP part performs conversion of the voice data of PSTN into packet data that can be
transmitted over IP networks. In other words, it provides H.323 V3-complient VoIP Gateway
functions to enable voice communication over the Internet. The VoIP part provides 4 Internet
telephone channels.
The features and functions of the VOIP part are as follows.
y
G.729A, G.723.1, G.726, G.711 audio codec support
y
Internet FAX support
y
FAX/data auto-detection