Verilink S Lite (34-00297.2) Product Manual - Manual (Page 9)

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Introduction The S Lite™ is a serial data loopback device with the ability to
go into remote loop for troubleshooting purposes. The S Lite
provides the capability to detect standard V.54 loop commands
from the local end to initiate loopbacks from the remote end and
to locally initiate remote loop. The customer can then determine
if a call to the local postal telegraph authorities is necessary.
The unit has a power bypass mode that allows data to pass
through the box when the unit is unpowered. The bypass mode
ceases when power is applied to the unit.
The S Lite supports X.21, V.35, EIA- 530, and RS-232 interfaces
presented from DB-25 connectors. The interface and loop options
are chosen from DIP switches. Adapters are available to convert
the connectors to the desired pinout.
Features
✦ Space-saving design can be desktop or wall mounted
✦ 90–256 VAC autoranging power supply
✦ DB-25 female DCE and DTE connectors
✦ LED status indicators
✦ DIP switch configurable
✦ Provides V.54 loopback detection on demand
✦ Power bypass relays on serial data loopback device to maintain
service to the customer if the the serial data loopback device
loses power. Automatically terminates bypass mode when power
is restored to unit.