Penril DDS SU56K CSU/DSUs ( Channel Service Unit/Digital
Service Unit) are compact, integrated units. Both synchronous and
asynchronous operation is provided over point-to-point and multi-point
dedicated or switched Digital Data Service (DDS).
The Penril DDS SU56K CSU/DSU units accommodate a variety
of DTE speeds from 300 bps to 56 Kbps (sync or async), and a range of DDS
speeds. DDS data rates are switch-selectable and clocking can be internal
or external via the DDS network. Auto speed detection automatically
adjusts the speed to the DDS network.
All CSU/DSUs are pre-configured for immediate
installation. Front panel LEDs (Light Emitting Diode) indicates
network-operating status to allow you to determine when the DDS central
office is sending an Out-of-Service signal, placing the CSU/DSU in a test
mode, or when a remote CSU/DSU is testing your circuit.
In addition to supporting the Telco generated DSU and CSU
loop-back, full diagnostics can be run via the front panel switch,
including self-test, digital loop-back, local loop-back and remote