V23 Modem - Lease Line

This V.23 modem operates at 600 and 1200 bps,
synchronous or synchronous, with V.23 modulation

4-Wire Private Line V.23 Synchronous or Asynchronous Modem

  • Full duplex to 1200 bps
  • Asynchronous or synchronous RS-232/V.24
  • 4-wire, full duplex line application
  • Standalone or rack mount
  • High stability transmit and receive frequency
  • Ruggedized for full temperature range
  • Quiet multi-layer board
  • Fully compatible with other V.23 modems

V23 4-wire Lease Line Modem

The V.23 modem operates at 600 and 1200 bps, synchronous or synchronous, with V.23 modulation. It accepts external transmit clock on pin 24 of the DTE connector or generates internal clock. It is now available in a full 13.5" PC ISA card, 7.25" half card size, and standalone configuration. The pc card uses the internal PC ISA bus only for power from the pc bus. The phone line connector is an RJ-11 for 4-wire leased line operation. Standard leased line wiring with transmit is on positions 2 and 3, receive 1 and 4 of the 4 position RJ-11 connector.

The modem has a push/push switch for local digital loop on or off. The DIP switch is located on the PC card and is accessible behind the front panel of the standalone modem. The loopback switch is located on the rear of the unit, next to the DB-25 terminal connector.

This modem is compatible with other V.23 modems, and features high stability transmit and receive frequency circuitry, and a large dynamic range.



Digital Interface

Controls and Indicators
Physical and Electrical
Switch                        	DOWN                        UP
1 - N/A
2 - Speed                	600                            1200        
3 - RTS/CTS delay       	4 ms                           8 ms
4 - Carrier               	Constant                    RTS Controlled         
5 - Clocking               	Internal                       External Pin 24 input        
6 - Transmit Level      	See table
7 - Transmit Level      	See table
8 - Digital Loop          	Loop On                    Loop Off




20 slot rack chassis - 19"W x 16"D x 7"H

Standalone rack fixture - 18.95" x 1.75" high

Single, Triple Unit Rack Mounts

Part numbers


V.23 Modem - Standalone


V.23 Modem - Rackmount

20-S Rack

20 Slot Rack w/ power supply

1U Rack

Rack mount 1 unit wide

1U Rack-3

Rack mount 3 units wide

Related pages

see other pages





301-924-7400 EXT 25

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