Nortel 1000E Installation And Configuration Manual page 109

Note: The MG1000E can be connected directly to the CS1000E ELAN
subnet, or it can be connected to the ELAN subnet through a Layer 3
switch.
Dual Homed connection
An MG 1000E can optionally be connected to a second BayStack 470 to
provide a 'Dual Homed' connection to the network so that the Media
Gateway remains operational in the event of a failure of the first BayStack
470 used for the ELAN subnet connection. Logical port 4 of the Dual Port IP
daughterboard (NTDK83) provides a connection to the second BayStack 470
providing an alternate connection to the network in the event of a failure of
the primary BayStack 470 used for the logical port 2 connection. Refer to
Figure 32 for a sample configuration.
Connecting CS 1000E system components
End of Procedure
Communication Server 1000E
Page 109 of 488
Installation and Configuration