Nortel Meridian 1 Mini-Carrier Remote, Описание, установка и обслуживание

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Description Page 13 of 150
Mini-Carrier Remote Description, Installation, and Maintenance
Remote site components
The remote site consists of a Remote Mini-Carrier Interface card (RMI) and
an Option 11 cabinet. The Option 11 cabinet contains the standard power
supply and standard IPE line cards. The only new components at the remote
site are the RMI and the RMI Multi-I/O cable assembly (NT5D87), see Figure
7 on page 19. The RMI plugs into the core processor slot in the Option 11 and
communicates with the LMI in order to provide the interface between the
local site’s IPE backplane and the remote site’s line cards. The switch and the
line cards function as if the line cards were plugged into the local IPE cabinet.
The LMI and RMI utilize two time slots for signaling communication
between the LMI processor and the RMI processor, and an SDI (Serial Data
Interface) link for the remote site. The two time slots are transmitted across
both T1s for redundancy. The remaining 22 time slots of each T1 may be used
for voice or data.
Physical architecture
The MCR system consists of three separate line cards. These line cards are
the Local Mini-carrier remote Interface card (LMI), the Local Mini-carrier
remote Extender card (LMX), and the Remote Mini-Carrier Remote Interface
card (RMI). The LMI and LMX cards take up two line card slots each. Due
to spacing differences of the IPE cabinet at the local site and the Option 11
cabinet at the remote site, two versions of each card are available.
The MCR system also consists of three new cable assemblies. These
assemblies are the LMI Multi-I/O cable assembly (NT5D85), LMI/LMX
Multi-I/O cable assembly (NT5D86), and the RMI Multi-I/O cable assembly
(NT5D87).
Physical description of cards
The LMI and LMX cards are double-wide line cards, each taking up two card
slots. The LMI has four LED indicators - Carrier 0 Alarm, Carrier 1 Alarm,
Maintenance, and Status. The LMX has two LEDs - Maintenance and Status.
The RMI is a single-width line card taking up just one card slot. It has the
same four LEDs as the LMI. All three cards’ faceplates have ejector tabs to
facilitate insertion and removal.
The LMI, LMX, and RMI faceplates are illustrated in Figure 2 on page 14,
Figure 3 on page 15, and Figure 4 on page 16, respectively.