iCable System ICS-G302, Operator'S Manual, Page: 8 / 63

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1.4 Router function
This S-MTA provides router functions. S-MTA will take care of all packets between
WAN-port and LAN-port, and enable the DHCP server function and NAT function to
support internet functions of PC, when it is connected to S-MTA.
1.4.1 S-MTA is connected to Cable Modem or xDSL modem directly
In this configuration, S-MTA will receive a public IP address from the network via
cable modem, ADSL modem, or HUB depending on the network configuration.
The PC will receive a private IP address from the S-MTA through DHCP function.
S-MTA automatically enables the NAT to solve problems, which can be occurred
when PC uses a private IP address.
1.4.2 S-MTA is connected to BBR – PC is connected to S-MTA
In this configuration, a broadband router, which supports UPnP IGD function
usually, is connected in front of S-MTA. The broadband router will receive a public
IP address, and S-MTA will receive a private IP address from the broadband
router via DHCP protocol, and PC will receive a private IP address from S-MTA
via DHCP protocol.