Sierra Wireless DART 200 CDPD Modem - Manual (Page 53)

DART 200 CDPD Modem User’s Guide 4 Broadcast and Multicast Operation
PN1197-00 Revision 1.0 4-3
Multicast setup
For multicast set up the DART 200 with a multicast IP Address and an
associated Group Multicast Identifier (GMID), in addition to the normal
IP Address, as follows:
1. Enter the Multicast NEI (like any other IP Address) by using the
AT^A command.
2. Select the NEI for multicast use with the AT\S+n command, where
n is the slot number in the DART 200’s IP Address list.
3. Define the GMID, use the AT^G command that assigns a multicast
group ID to the slot containing the Multicast NEI, for example:
• AT^P+51348954 Must be in Service Provider mode
• AT^A198.225.189.35/1 Enter multicast IP Address in slot 1
• AT^G12/1 Set GMID for slot 1 to 12
• AT\S+1 Select IP Address in slot 1 for
multicast use
4. Verify the set up of your Multicast NEI with an AT\S? command; it
shows the CDPD modem’s NEI status. The screen appears as shown
in Figure 4-1:
Figure 4-1. Checking NEI status with AT\S?
AT\S?
SLIP = IP ADDRESS 001.001.001.002
MAS = IP ADDRESS 198.225.189.031
* NEI 0 = IP ADDRESS 198.225.189.031 GMID 0000C
+ NEI 1 = IP ADRESS 198.225.189.035 GMID 00012
SPI 0 = 00012
SPNI 0 = 00035
WASI 0 = 00001
OK
* - Indicates which slot contains the active point-to-point NEI (IP Address)
+ - Indicates the multicast NEI selected.
Both NEIs must be registered concurrently; there is no command to
register a multicast NEI by itself. Define and select the multicast NEI
before registering the point-to-point NEI. The GMID field in Figure
4-1 is only applicable to the multicast NEIs.
The DART 200 can have multiple Multicast NEIs defined, but can only
have one active at a time. The multicast designation for a particular slot
in the NEI table can be deactivated by an AT\S-n command, (where n is
the slot number), and a different one activated by an AT\S+n command.