Nortel QMT12 ADM, Руководство пользователя

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Equipment description Page 33 of 80
Meridian Data Services Description
4-Port Data Line Card
The 4PDLC is located in a Peripheral Equipment (PE) shelf. It meets the
physical and electrical specifications of any DLC to data-module interface
and provides access to network channels for data information. The 4PDLC is
used in applications that require a large concentration of data ports.
It provides four SL-1 data only ports and is primarily designed to serve
MCDS-AC, ASIM, CIM, CIC, and stand-alone ADM.
The 4PDLC does not support calls that involve voice ports such as in
outbound modem pool calls. The 4PDLC accepts both voice and data call
signals but does not distinguish between them and therefore cannot be used
in cases where both types of signals are present.
The 4PDLC has one LED indicator on the faceplate that is lit when the card
is disabled.
Modem Pool Line Card
Outbound Modems
The MPLC (QPC353) contains four ports and is used exclusively in
asynchronous outbound modem pool configurations to support originate
modems. It provides the Voice Frequency Directory Number (VFDN) for call
connection on the analog side of an outbound pooled modem. The
synchronous outbound modem pools use the regular QPC60 line card (or the
double density line card [QPC452] that contains eight instead of four ports).
The MPLC is used with originate/answer modems. There are four identical
circuits on each card and they prevent ring voltages from being applied to
ensure that each modem remains in the originate mode during call setup.
Inbound Modems
The regular 500-set (or double density) line card is used for asynchronous and
synchronous inbound modem pool configurations.