4-25
Cisco MGX 8220 Installation and Configuration
Release 5.0, Part Number 78-6430-03 Rev. D0, November 2003
Chapter Inverse Multiplexer for ATM Trunk Module
Figure4-13 IMATM Used with Remote MGX 8220
Up to eight T1 or E1 link s in t he inverse multiplexed channel can b e c onfigured depending upon th e
bandwidth desired. Bandwidth of T1 lin ks rang e from 1. 54 Mbps fo r one lin k to 12.35 Mbps f or all eigh t
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 provisione d to pro vi de s ome pr ot ecti on ag ains t lin k fa ilu re . 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 o ccu r s but no r er ou ti ng . Witho ut th is f ea ture, a single link
failure will cause a major alarm and all connections will be rerouted over another trunk.
IMATM LED Indicators
The IMATM LED indicators are described in Table 4-3. All LED indicato rs are located on the faceplate
of the front card.
T1, E1 or T3
Service
Interface
Lines
Long Distance
IMA Trunk BPX 8620 Broadband ATM Service
S6177
MGX 8220
MGX 8220
Tab le 4- 3 IMAT M L ED In di ca to rs
Type of LED Color Meaning
ACT Green On indicates the card set is in act ive mode.
STBY Yellow On indicates the card set is in standby mode.
FAIL Red On indicates the IMA TM car d set has fail ed or the line module
is missing.
PORT Green Green indicates th e line is active.
Yellow Yellow indicates a remote alarm on the line.
Red Red indicates a local alarm on the line.
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.