2.048 E1 MBPS CARD (120 OHM) Similar to 90-0371-02 but tailored for 120 OHM application. Supports rear AMP CHAMP signal access only. Requires one 90-0568-02 (120 ohm) E1 LIM.

2.048 E1 MBPS CARD (75 OHM) Mother card for single 2.048 Mbps E1 electrical interfaces. Conforms to CCITT G.703 and G.732. Requires the E1 LIM (90-0568-01) daughter card to complete the interface. The Superrate Adaptor Module (90-0469-01) for E1/T1 rate conversion or the Companding Conversion Module (90-0369-01) for A-law, Mu-law conversion are also supported.

20 HZ RINGING GENERATOR

220/240V TO 48 VDC RECTIFIER Rack containing one 1680W, 220/240 VAC nominal to 48 VDC rectifier with mounting hardware, power cord and termination hardware for two rectifiers, as the rack can accomodate two rectifiers for a redundant configuration. A second rectifier is available by ordering an upgrade kit (90-2844-02). The rectifier rack is 3 rack units tall (5.25 ) and fits a standard 19 rack.

220/240V TO 48 VDC UPG KIT A single 1680W 220/240 VAC nominal to 48 VDC rectifier with p ower cord. This rectifier plugs into the 7470 220/240 VAC to 48 VDC Rectifier rack (90-2844-01).

23 ADAPTOR (FASTBUS) Adapter plate required to mount 90-1637-01 FASTBUS Interconnect Panels in 23 equipment rack. Only one required.

23IN ADAPTOR (2 UNIT) Adaptor plate required to mount the 90-0890-01, 90-0890-02, and 90-1236-01 assemblies or any other 19 inch rack mount assemblies of two vertical units, to a 23 inch rack.

23IN CARD FILE ADAPTOR Adaptor plate required to mount 90-0010-02, 90-0010-04, and 90-0010-10 3600 shelves to 23 equipment racks. Only one required.

23IN DIST PANEL ADAPTOR Adaptor plate required to mount 90-0348-01, 90-0349-01, 90-1066-01 and 90-0350-01 distribution panels in 23 inch equipment racks. Only one required.

256KB/S HE RF MODEM

2601 DTU V.24 RS232

2601 DTU V.24 RS232

2603 DTU V.35

2603 V.35 Bit Error Rate Tester

2608 RS232 DTU 220V

2610 CPSS DTU 230VAC

2701 RS232/V.24-ANM115V ER DTU

27130 SDSL V.35 FR NTU R1.0

27LC3-12 LINE CARD The 27LC3 line card is used in the 3600 and 3600+ Mainstreet. This card provides twelve 2B1Q interfaces to 275X Extended Range Data Termination Units(DTU's). Data Format for each circuit is 2B+D, with an effective throughput of 144KBPS. This card is for

28LC LINE CARD 6PT The 28LC is a 6 Port RADSL Line Card used to connect the 2801-2W (90-4925-01) and 2801-4W (90-4826-01) Data Termination Units. It supports enhanced operation administration and maintenance features such as open short detection, line quality statistics and power failure detection for the 2801-2W and 2801-4W. This is the Class A Compliant version of the 28LC.