The RAD FCD1L is a low-cost, single port CSU/DSU for T1 or Fractional T1 services. The RAD FCD1L DTE port is selectable for any data rate multiple of 56 or 64 kbps up to 1536 kbps. User data is placed into a T1 frame, using only the selected number of timeslots.

 Single port access to T1 or fractional T1 services

 Optional built-in CSU

 Selectable sync data rates: n x 56 kbps, n x 64 kbps

 Data interfaces: V.35, RS-530, V.36/RS-422, X.21

 T1 interface complies with AT&T TR-62411, TR-62421, ANSI T1.403

 Main link diagnostics include loop-backs, BERT injection and data port monitoring

FCD-1L/115, FCD-1L/230, 
FCD-1L/48, FCD-1L/R

The RAD FCD-1L is a single port access unit for full or fractional T1 services. Data port rates are selectable for any multiple of 56 kbps or 64 kbps up to 1,536 kbps. User data is placed into a T1 frame, using only the required number of timeslots. Timeslot assignment is performed according to the data port speed and is consecutive, starting from any timeslot.

The RAD FCD1L can be ordered with or without a CSU. The integral CSU ensures a range of up to  2 km (1.2 miles).

The RAD FCD1L meets all the requirements of  TR-62411 and TR-62421. It supports both D4 and ESF framing formats. Zero suppression over the line is selectable for B7ZS or B8ZS.

The main RAD FCD-1L T1 link may be clocked from the recovered receive clock (LBT) or from an internal oscillator.

The RAD FCD-1L can  have RS-530 data channel interface. Adapter cables are available for V.35, V.36/RS-422 or X.21.

RAD FCD-1L setup and control is by internal jumpers. Front panel switches control all diagnostic options.

The RAD FCD-1L Diagnostics include user-activated local loop-backs on the main T1 link and DCE data port. A pseudo-random data pattern (BERT) can be used to check the transmission path and the local and remote units. The FCD-1L can display major and minor alarms, and indicate bit error rate on the T1 line in excess of 1 x 10-3.

The RAD FCD-1L is available as a standalone unit  or as a card in a 19" rack. An adapter kit enables installation of one or two standalone units in  a 19" rack.

Part Numbers for the  RAD FCD-1L

RAD FCD-1L/115                             
RAD FCD-1L/230                             
RAD FCD-1L/48                              
RAD FCD-1L/R                               

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