AT&T MERLIN LEGEND Release 3.1 Installation Manual page 157

Installing the Channel Service Unit
The front-panel LEDs are labeled and colored differently from the ESF
T1 CSU.
The NETWORK connectors on the rear of the ACCULINK models are
8-pin modular jacks (RJ48C) instead of male 15-pin D-connectors.
Cables are shipped with the units for the CSU-to-Smart Jack
connection.
There are no DIP switch options. All options are set via software
commands. Access the options in the following ways:
— Locally, from the front panel
— Remotely, using the integral 2400-bps modem. The front panel of a
local ACCULINK, in Passthrough mode, can access and option a
remote CSU
— Locally and remotely, through the COMPORT connector on the rear
and a PC loaded with a Windows software package (available at
an extra charge from Paradyne)
The ACCULINK CSUs come equipped with two factory-set option
configurations: Factory 1 (Fact 1) and Factory 2 (Fact 2). They leave the
factory set at Fact 1. Two of the default parameters in Fact 1 are ESF/B8ZS. In
the Fact 2 setting, two of the default parameters are D4/AMI.
The CSUs offer a number of front-panel alarms and monitor alarm conditions
occurring either on the network interface or on the DTE interface. If an
ACCULINK CSU detects two alarm conditions at the same time, it reports the
higher priority alarm. Alarms remain active until the alarm condition is cleared.
Network performance is continually monitored and maintained by internal
memory registers when the network interface is configured for ESF operation.
The registers collect performance data for the previous 24-hour period.
4–16
Connecting the Control Unit to the Network Interface