Lucent 5ESS DRM - 2.4 DRM Hardware

the AW contains assist processes which convert I/O messages sent to the AM IOP by
the AM software to messages which can be sent to the terminal interfaces attached to
the AW.
The SM-2000 portion of the DRM communicates with its local AW via the Message
Handler Ethernet Interface Board (MHEIB). An Ethernet switch can be used to
multiplex 10BaseT links between the DRM AW and a multi-service access device. A
multi-service access device can then be used to transmit data signals over a DS1 for
transport over a commercial data network back to the Host. In addition, the
multi-service access device can be used to transmit HSI and SAI data signals. Another
multi-service access device is used at the Host to convert back to a 100BaseT Ethernet
interface, which is connected to an Ethernet switch, which then multiplexes to the
Administrative Services Module (ASM) (see 235-200-145, 5ESS Switch OneLink
Manager Administrative Services Module (ASM) User’s Guide). The ASM provides
access to smart maintenance terminals, high speed data links, and OA&M
functionality for the entire Switching Complex (a 3B21D/CM2 and up to 15 DRMs).
The maximum number of SM-2000s in the Switching Complex is 23, of which 15 may
be DRMs. There is no connection from a DRM to a 3B21D or a CM2.
2.4 DRM Hardware
The DRM is composed of two major components:
• Administrative Workstation (AW) - consists of a frame mounted workstation
running the AM and CM2 emulated software.
• Switching Module (SM-2000) - performs all call processing functions and has the
flexibility to support Plain Old Telephone Service (POTS), Integrated Services
Digital Network (ISDN), and tandem and wireless applications.
Figure 2-1 illustrates the architecture for the Switching Complex.
DCI
100BaseT
10BaseT
DRMs and 5ESS(R)
switch host share only
physical data links and
craft I/O terminals.
DS1 (Frame Relay)
DS1 (Frame Relay)
10BaseT
10BaseT
Data & Transmission
Network
Data & Transmission
Network
ASM
3B21D
CM2
SM-2000 SM-2000
Ethernet
Switch
10Base2
DRM
AW
Bits Clk
SM-2000
MHEIB
PSU2
RS-232
10Base2
DRM
AW
Bits Clk
SM-2000
MHEIB
PSU2
RS-232
Maximum of 15 DRMs in a Switching Complex
DS1 per DRM
Figure 2-1 — Switching Complex Architecture
235-200-150
Feburary 2007
5ESS
®
SWITCH DISTINCTIVE REMOTE MODULE
Issue 3.00O Page 2-3