Bell, 208, Modem and 801 Auto Calling 366 Dialer
The 4850PA is not just another Bell 208 modem. This modem features an integral serial auto-dialer based on SADL (Synchronous Auto Dial Language). SADL dialing supports HDLC, SDLC and BSC protocols. SADL dialing eliminates the need for expensive RS366 computer ports and Bell 801 dialers. Which ever synchronous protocol you use, your system can issue dialing and options commands to the modem using SADL.
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MODEL - PRODUCT & DESCRIPTION
4800 bps HALF-DUPLEX (AT&T 208) MODEMS
RACKMOUNT AT&T 208 A/B compatible, Sync only, Up to 8 cards in a VA1681C chassis (2 in VA1604). Dial-up or 2/4-wire leased line. Includes: modem, telco cable for dial-up and manual.
Note: 2-/4-wire leased line applications, order optional cable 15044-004.
STANDALONE AT&T 208B and ITU-T V.27ter compatible, Sync only. Synchronous SADL autodialer, front panel control w/LCD, Integral 801 ACU. Dial-up or 2-wire leased line. Includes: modem, 110V power supply, telco cable and manual, 801 ACU applications, order optional cable 91009-094.
RACAL-VADIC CHASSIS and ACCESSORIES
RACAL-VADIC CHASSIS 16-slot rack-mountable for VA1244, VA2440 & VA4840 modems.
Front panel EIA status and diagnostics. Includes: chassis, 13005-209 110V power supply, AC cable and manual.
RACAL-VADIC DESKTOP CHASSIS 4-slot standalone for VA1244, VA2440 & VA4840 modems.
Front panel EIA status and diagnostics, Includes: chassis, AC cable and manual.
DPSR Auto Calling Unit, AT&T 801 compatible for VA1681 C chassis.
|External and Rackmount Bell 208 Modems
4850PA with Three Synchronous Protocols
The 4850PA is not just another Bell 208 modem. This modem features an integral serial auto-dialer based on SADL (Synchronous Auto Dial Language). SADL dialing supports HDLC, SDLC and BSC protocols. SADL dialing eliminates the need for expensive RS366 computer ports and Bell 801 dialers. Whichever synchronous protocol you use, your system can issue dialing and options commands to the modem using SADL.
Integral Bell 801 Dialer
In addition to SADL, the 4850PA is compatible with the Bell 801 automatic calling unit parallel dialing protocol. With the 4850PA you do not have to purchase an external 801ACU because this modem has one built inside. Simply connect the optional 801ACU cable to your existing 801 dialer port.
You can operate the 4850PA from the terminal or the LCD front panel on the modem. Twenty-nine options let you customize the 4850PA to your application. No other Bell 208 modem comes close to the 4850PA in features, performance and price.
The 4840-PX delivers rock-solid performance for the high-density central site application. Each modem occupies two slots for a total of eight modems in the 16 slot 1681C chassis or a total of two modems in the 4 slot standalone desktop chassis.
Forty-eight 4840-PX modems will fit in a standard communications cabinet. The 4840-PX is compatible with two additional accessory cards, the 811D-PSR for RS366 dialing and the 831 adapter for parallel to serial conversion. The 4840-PX will operate with these accessory cards in either a single line or multiline configuration.
They Never Rest
When the modem is waiting to make a call or answer a call, the 4850PA and the 4840-PX run a continuous self-test that monitors each modem's transmitter, receiver, DSP and microprocessor for trouble. If a problem should occur, the modem can even take sick leave and remove itself from service.
If you are looking for an external 208B or a rackmount 208A/B modem that is fast, powerful and heavy on features, we have the right one for you.