Link1 TADIL-B Modem - FSK Analog Modem, V.23, Sync or Async

 Link 1 TADILB Modem


Digital Interface
Controls and Indicators
20 Slot Rack Data Sheet
How to Order


L1 TadilB Modem Rack Mount
PC ISA Card Format

L1 TadilB Modem Stand-alone
Stand Alone Format



The Link1 TADILB modem operates at 600 and 1200 bps, synchronous or asynchronous, with V.23 modulation. The modem accepts external transmit clock on pin 24. The modem operates in Link1 DFSK mode (differential frequency shift key) at 600 and 1200 bps. Full 13.5” PC card, 7.25” half card size, and standalone configurations are available. The pc card uses the internal pc ISA bus only for power from the pc bus. The serial terminal interface is RS-232, DB-25. The phone line connector is an RJ-11 for 4-wire leased line operation. Transmit is on positions1 and 4, receive 2 and 3 of the 4 position RJ-11 connector.

The modem has DIP switch controls for the TADIL-B (V.23) or LINK1 mode, for 1200 or 600 bps operation, for 4 or 8 ms RTS/CTS delay, for constant carrier (RTS forced on) or terminal controlled RTS, and transmit level settings of +3, 0, -16 and –30 dBm. 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.



Digital Interface
Controls and Indicators


Switch DOWN UP
1 – mode TADIL-B mode (V.23) LINK1 mode
2 – Speed 1200 bps 600 bps
3 - RTS/CTS delay 4 ms 8 ms
4 – Carrier Constant RTS controlled
5 – Clocking Internal TxClock External (pin 24)
6 - Tx Level see table
7 - Tx Level see table
8 - Loopback Loopback ON Loopback OFF

Transmit Audio Level Settings:

Level Switch 6 Switch 7
+3 dBm UP UP
-16 (-8 on rev A) DOWN UP
-30 (-16 on rev A) DOWN DOWN

Internal Jumpers  for Signal Logic Inversion.  (near RS-232 connector)    
TxD Remove jumper to invert signal
RxD Remove jumper to invert signal
TxClock Remove jumper to invert signal
RxClock Remove jumper to invert signal

Physical and Electrical


PC Card Rack Chassis


The Link1 TADILB modem is normally used with standards based equipment that requires reliability rather than speed. The PC ISA format card is used in a standard PC ISA chassis.It draws power from that chassis and has no other internal chassis connections. There is a 20 slot ISA chassis available for this format with built-in power supply. The stand-alone model uses a wall-mount AC power supply. There is a 3 unit rack mount available for the stand-alone mldel.

How to Order

Available here on our web store, directly from Data Comm for Business, or any DCB distributor.

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

Item Number Description Price Buy Now!
L1TadilB-SA Link 1 TadilB Modem - Standalone w/ 110VAC wall mount supply $ 1115 Qty:
L1TadilB-12VDC Link 1 TadilB Modem - Standalone w/ 9-18 VDC internal power supply $ 1190 Qty:
L1TadilB-24VDC Link 1 TadilB Modem - Standalone w/18-36 VDC internal power supply $ 1190 Qty:
L1TadilB-48VDC Link 1 TadilB Modem - Standalone w/36-72 VDC internal power supply $ 1190 Qty:
V23-125VDC 125 VDC external power supply option for L1TadilB-SA $ 125 Qty:
L1TadilB-R Link 1 TadilB Modem - Rackmount $ 1000 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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