THE TPXMIM AND MMAC BACKPLANE
TPXMIM Installation Guide
Page 5
Multi-channel management modules provide bridging and optional
routing control for Ethernet Channels A, B, and C on the MMAC
backplane, and Channel D from the module faceplate. All Channels
access the same shared memory, allowing a management module to
bridge any or all packets it receives for any given Channel. In addition,
the EMM-E6 provides options for two additional Ethernet connections
(channels E and F) that access WAN, ATM or FDDI networks.
For additional information regarding the EMME or EMM-E6, refer to
specific module documentation.
1.5
THE TPXMIM AND MMAC BACKPLANE
The Multi Media Access Center with Flexible Network Bus
(MMAC-FNB) provides the TPXMIM with power, Ethernet A Bus
(Channel A), and FNB (Channel B and C) access (Figure 1-1).
Figure 1-1. MMAC Flexible Network Bus
Two types of MMACs currently support FNB architecture — shunting
and non-shunting. MMACs equipped with shunting backplanes allow
modules operating on the B or C bus to continue communicating
regardless of whether there is an empty slot or an A Channel module
between them in the chassis. The following table gives the part numbers
of the MMAC chassis that have shunting capabilities.
Power & Management Bus
Flexible Network Bus
Ethernet A Bus
Ethernet B Bus
Ethernet C Bus
