V.23 2-wire or 4-wire Leased Line Modem

V.23 2-wire or 4-wire Asynchronous Private Line Modem

Full duplex to 1200 bps
Asynchronous RS-232/V.24
4-wire, full duplex private line
2-wire, half duplex private line
900 Hz soft carrier turn off
Anti-streaming
Standalone or rack mount
PC card rack model (PC supplies power and ground only)
High stability transmit and receive frequency
Ruggedized for full temperature range -40 to +75C
Quiet multi-layer board
Fully compatible with other asynchronous V.23 modems
120, 220 VAC, 12, 24, and -48VDC options

FEATURES
DESCRIPTION
SPECIFICATIONS

General
Indicators
Switches
Physical and Electrical
Download a copy of the manual.

HOW TO ORDER

Looking for a 4-wire only modem that covers both synchronous and asynchronous?
Check out our V.23 sync/async 4-wire model. Click here.

FEATURES

Full duplex to 1200 bps
Asynchronous RS-232/V.24
4-wire, full duplex private line
2-wire, half duplex private line
900 Hz soft carrier turn off
Anti-streaming
Standalone or rack mount
PC card rack model (PC supplies power and ground only)
High stability transmit and receive frequency
Ruggedized for full temperature range -40 to +75C
Quiet multi-layer board
Fully compatible with other asynchronous V.23 modems
120, 220 VAC, 12, 24, and -48VDC options

The V.23 modem operates at 0 to1200 bps asynchronous, with FSK modulation, 2-wire or 4-wire over non-switched dedicated lines. It uses the latest DSP modem circuitry to insure excellent performance and future availability. It has 900 hz soft carrier turn off for multidrop and an anti-streaming option.

The V.23 modem is avaiable in 7.25” half card size, standalone and custom OEM board configurations are available. The pc card uses the internal PC ISA bus only for power from the pc bus. The PC card fits into a 20 slot rack mount chassis that is only 7” high. The phone line connector is an RJ-11 for 4-wire leased line operation. Transmit is on positions 2 and 3, receive 1 and 4 of the 4 position RJ-11connector. The modem has a push/push switch for local digital loop on or off. The loopback switch is located on the rear of the unit, next to the DB-25 terminal connector.

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

SPECIFICATIONS

General

Modem

Analog half or full duplex, 2-wire or 4-wire, 600 ohm balanced
Frequency Shift Keying:
Mark-1300 hertz, space-2100 hertz at 0 to 1200 bps asynchronous
Transmit level control 0 dBm or -16 dBm
Receive sensitivity is 0 to -42 dBm
Will drive up to 30 Km of cable depending upon wire gauge
Switched carrier or constant carrier operation (RTS forced on or terminal controlled)
V.23 modems will communicate with military l1TADILB modems configured in V.23 mode, however they will not interoperate if the L1TADILB modem is in Link 1 mode

Digital Interface

RS-232/V.24, DB-25S
Signals are Tx, Rx, RTS, CTS, DSR, DCD
RTS/CTS delay in switched carrier mode is 40 ms for 4-wire, 50 ms for 2-wire, or RTS can be forced on
Rx data is clamped to mark when no receive carrier detect is present.
V.23 Modem - FSK Analog Modem, asynchronous

Controls and Indicators

Power, Tx Data, Rx Data, RTS, CTS, DCD, Test
Digital loop via rear panel switch and front DIP switch
Controlled carrier (with RTS/CTS delay) or constant carrier with RTS/CTS on
Anti-streaming options (8 seconds)
Loopback or normal operation
Transmit levels 0 dbm or -16dbm
900 Hz Soft Carrier turn off enabled or disabled

Physical and Electrical

-40C to +75C operating temperature -50C to +75 storage temperature
95% non-condensing humidity
PC ISA bus format or standalone version,
PC bus for power and ground only, standard standalone unit uses 120V wall mount supply
Half size PC ISA card, 7.25"D x 4.25"H
Stand alone: 5.5" W x 7.375"D x 1.5" high, 120VAC wall mount supply (9VDC, 500 ma)
Other DC power supply voltages, 12, 24, -48, 125 VDC, available on special order
A 1.5" x 19" fixture is available to rackmount up to 3 standalones in a single 1U height
20 slot rack chassis on slide guides is 19"W x 16"D x 7"H, 110VAC 250 W power supply
Weight approximately two pounds

Switches

OPTION SWITCH SETTINGS 
Switch                        DOWN                        UP
1 - Reset			OFF			Toggle Up/Down
2 - Anti-streaming		OFF			On        
3 - Phase Equalizer		ON			OFF
4 - RTS Control			Forced ON		RTS Controlled         
5 - Soft Carrier		Turnoff disabled	Enabled   
6 - Line type			4-wire			2-wire
7 - Transmit Level		-16 dBm			0 dBm
8 - Loopback			Loop ON			Loop OFF

APPLICATION


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

Item Number	Description	Price	Buy Now!
Need it fast? Buy on-line or call toll free 800-432-2638!
V23-Async-SA	V.23 Asynchronous Modem - Standalone w/ 110VAC wall mount supply	$ 555	Qty:
V23-Async-12VDC	V.23 Asynchronous Modem - Standalone w/9-18 VDC internal power supply	$ 630	Qty:
V23-Async-24VDC	V.23 Asynchronous Modem - Standalone w/18-36 VDC internal power supply	$ 630	Qty:
V23-Async-48VDC	V.23 Asynchronous Modem - Standalone w/36-72 VDC internal power supply	$ 630	Qty:
V23-125VDC	125 VDC external power supply for use with V23-Async-SA	$ 125	Qty:
V23-Async-R	V.23 Asynchronous Modem - Rackmount	$ 445	Qty:
DCBL1	20 Slot Rack w/ power supply	$ 1680	Qty:
9902096	19" Rack Bezel 1 unit wide	$ 30	Qty:
9902095	19" Rack Shelf 3 units wide	$ 75	Qty:



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V.23 2-wire or 4-wire Asynchronous Private Line Modem

Need it fast? Buy on-line or call toll free 800-432-2638!