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Page 68 of 80
Implementation
Cable specifications
Modem pool configuration
Hardware requirements
553-2731-100
Standard 5.00
Twisted wire pairs must be used for digital pairs, and no bridge taps are
allowed. The crosstalk figure of cable used between the MDF and ADM
measured at 64 kHz with 100 ohm termination must be
•
near end crosstalk > 40 dB
•
far end crosstalk > 40 dB
Strapping options are provided on the DLC and ADM for the selection of wire
gauges applicable to the installation.
The modem pool configuration provides internal data station access to shared
dial-up modems for outgoing trunk calls and remote terminal access to local
computer ports over a voice-grade network. The inbound modem pool is
separate from the outbound modem pool. An ADM connected to the modem
provides the DDN required for the receipt of incoming calls to the pooled
modem.
Note: With AMP it is no longer necessary to maintain separate inbound
and outbound modem pools.
The number of modems within a modem pool is determined according to
traffic requirements for that modem pool (see Meridian Data Features:
Traffic Engineering and Configuration (553-2731-151)), and several modem
pools may be configured as required to meet the customer's application
requirements.
This section describes the primary equipment items, excluding the SL-1
switch itself, required to implement the Meridian Data Services feature.
One ADM, or AIM, or ASIM, or MCDS-AC is required to interface with each
data device supplied by the customer.
April 2000
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