Lucent 5ESS DRM, User Manual, Page: 32 / 642

2.4.3 Switching Module Hardware
The switching module provides terminations for all lines, trunks, and service circuits
within the DRM. It performs the call processing functions and time division switching.
It is capable of stand-alone billing and can be configured to meet the needs of many
applications. It requires some common units and can accommodate many peripheral
units. For information on call processing, see 235-145-100,
5ESS Switch Call
Processing Description .
Common Units
are those units required in a switching module. The common units
include:
•
The Module Controller/Time Slot Interchange (MCTSI)
•
The Ethernet Interface Board (EIB)
•
T1/E1 External Reference Timing
•
Digital Service Control Unit
2.4.3.1 The Module Controller/Time Slot Interchange (MCTSI)
The Module Controller/Time Slot Interchange (MCTSI) includes the Switching Module
Processor Unit Model 5 (SMPU5) and Time Slot Interchange Unit Model 4, Version 2
(TSIU4-2) which provides all necessary call processing and maintenance functions in
the switching module. It operates in an active/standby configuration so that in the
event of a fault, the active processor switches to the standby side without losing any
stable calls.
2.4.3.2 The Ethernet Interface Board (EIB)
The SM-2000 utilizes an MHEIB circuit pack to provide all communications and data
transfers between the SM-2000 and the AW.
The Ethernet link is terminated on an Ethernet paddleboard (982AAH) connected to
the backplane of MHEIB. The Ethernet interface paddleboard is a small square circuit
board that contains circuitry and a coaxial connector jack used to connect the MHEIB.
Ethernet communications are handled internally by the SMP. Refer to Figure 2-8.
5ESS
®
SWITCH DISTINCTIVE REMOTE MODULE 235-200-150
Feburary 2007
Page 2-10 Issue 3.00O