Sierra Wireless DART 200 CDPD Modem manual Sierra Wireless, Inc

DART 200 CDPD Modem User’s Guide 4 Broadcast and Multicast Operation

Some software stacks, used when the DART 200 operates in Serial Line Internet Protocol (SLIP) mode, only receive broadcast messages (including multicast) on a specific IP destination address, specifically the point-to-point NEI. To provide for this limitation, the DART 200 permits specifying whether or not the received destination IP Address (multicast address) is replaced with the active point-to-point NEI before the received packet is passed across the SLIP interface to the software stack.

This feature is implemented by using the AT*G command. AT*G1 (default) causes the received destination address to be replaced as described above. AT*G0 passes the received packet across the SLIP interface to the TCP stack unmodified, with the destination address being that of the Multicast NEI.

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