Specifications

4-4 Cisco MGX 8220 Reference, Release 4.1
Frame Service Module
Figure4-3 IMATM Used with Remote MGX 8220
Up to eight T1 or E1 links in the inverse multiplexed channel can be configured depending upon the
bandwidth desired. Bandwidth of T1 links range from 1.54 Mbps for one link to 12.35 Mbps for all
eight links. Bandwidth of E1 links range from 2 Mbps for one link to 16 Mbps for all eight links.
The BNI port bandwidth is configured to match the IMATM bandwidth.
Additional links can be provisioned to provide some protection against link failure. To achieve this,
the BNI trunk should be programmed to have a statistical reserve equal to the bandwidth of the extra
links. In the event of a link failure, a minor alarm occurs but no re-routing. Without this feature, a
single link failure will cause a major alarm and all connections will be re-routed over another trunk.
IMATM LED Indicators
The IMATM LED indicators are described in Table4-1. All LED indicators are located on the
faceplate of the front card.
Table4-1 IMATM LED Indicators
Frame Service Module
The Frame Service Module (FRSM) is a two-card set consisting of an FRSM front card (channelized
or fractional, T1 or E1, 4 port or 8 port) and either a 4 T1, 4 E1, 8T1, or 8E1 back card. Up to ten
FRSMs may be installed in a shelf in slots 5 through 14. FRSM front cards are shown in Figure4-4.
Type of LED Color Meaning
ACTIVE (ACT) LED Green On indicates the card set is in active mode.
STANDBY (STBY) LED Yellow On indicates the card set is in standby mode.
FAIL (FAIL) LED Red On indicates the IMATM card set has failed or the line
module is missing.
Port (PORT) LED Green Green indicates the line is active.
Yellow Yellow indicates a remote alarm on the line.
Red Red indicates a local alarm on the line.
High Speed Port (HSPORT) Green Green indicates the line is active.
Yellow Yellow indicates a remote alarm on the line.
Red Red indicates a local alarm on the line.