Nortel Meridian Meridian 1, Планирование, установка и инструкции по эксплуатации

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Chapter 2 — Equipment identification Page 15 of 536
Option 11C Compact Planning, Installation, Fault Clearing and CCBR Guide
NTMW49 RSM circuit card
The NTMW49 RSM circuit card supports three RS232-C ports and a 2X25
pair socket for the MDF connection. It also provides one socket for
connecting to the backplane of the main cabinet. The card has a BYPASS
slider switch and an LED indicator light. The NTMW49 circuit card is
enclosed in a metal box (the NTMW50).
ISDN and Digital Trunk Interface
The NTMW04 1.5 M b DTI/PRIcard provides 1.5 Mb ISDN primary rate
interface and digital trunk interface capabilities as well as Clock recovery and
D-Channel interface. It can be installed in any of the three upper PE slots in
the main cabinet.
For more information about ISDN and network equipment, refer to the
Option 11C Compact 1.5 DTI/PRI Administration and Maintenance Guide,
Peripheral cards
The following Peripheral (PE) cards are used in both the Main and Expansion
cabinets.
• NTMW05 24 Port Digital Line Card (24 DLC) is a mini card equipped
with 24 voice ports and 8 data ports capable of interfacing with Digital
Aries sets and M2250 Digital Console.
• NTMW06 16 Port Message Waiting Analog Line Card (16 MLC) is a
mini card equipped with 16 voice ports capable of interfacing with 500-
and 2500-type analog telephone sets. It also supports high voltage
message waiting lamp indicator.
• NTMW07 4 Port Universal Trunk/4 Port Analog Line Card
(4þUT/4þMLC) is a mini card equipped with four analog trunk ports and
four analog line ports. The four trunk ports can interface CO, Loop, TIE,
Paging or RAN trunks.The four line ports provide the same functionality
as the ports on the 16 MLC.
The NTMW07 also provides a Power Failure Transfer Unit (PFTU)
function. It allows one trunk on the card to be connected to a telephone
set on the same card in the event of a power failure.
• NTMW44 4 Port Universal Trunk Card (4þUT) is a mini card equipped
with four analog trunk ports. The four ports can interface CO, Loop, TIE,
Paging or RAN trunks.