BLACKBOX-ME807A Short-Haul Modem-B Parallel-R, Standalone Receiver 4線平行有限距離數據機, Slave

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BLACKBOX-ME807A Short-Haul Modem-B Parallel-R, Standalone Receiver 4線平行有限距離數據機, Slave

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商品編號: BLACKBOX-ME807A

BLACKBOX-ME807A Short-Haul Modem-B Parallel-R, Standalone Receiver 4線平行有限距離數據機, Slave

Push your parallel data an amazing 5 miles

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★★★★商品說明★★★★

Description

Short-Haul Modem-B Parallel-R, Standalone Receiver

Quick Facts

Parallel to parallel or use with the Short-Haul Modem–B Async (ME800A-R2) for parallel to serial or serial to parallel.

Send data at 19.2 kbps up to 1 mile (1.6 km) away.

Send data at 1200 bps up to 5 miles (8 km) away.
　

Further Details

With a standard parallel connection, you can send data about 25 feet (7.6 m) before encountering electrical interference and signal degeneration. For longer distances, you need the BLACK BOX® Short-Haul Modem–B Parallel.

With a pair of these short-haul modems, you can send data to printers up to 5 miles (8 km) away. Use the T and R models together for parallel-to-parallel applica?tions. To run parallel-to-serial or serial-to-parallel applica??tions, com?bine either model with our Short-Haul Modem–B Async (ME800A-R3).

NOTE: Must be used in pairs (one transmitter, one receiver) or with the Short-Haul Modem–B Async (ME800A-R3).

These products work with:
• GigaBase® 350 CAT5e, 350-MHz Bulk Cables, 4-Pair (EYN851A)
Questions? Contact Tech Support.
Also works with:
• Short-Haul Modem–B Async (ME800A-R3)
The card versions also work with:
• Short-Haul Modem–B Racks (RM007, ME810)
Questions? Contact Tech Support.

Technical Specifications for Short-Haul Modem-B Parallel-R, Standalone Receiver:

Distance (Maximum) — 5 mi. (8 km)
Operation — 4-wire full-duplex, point-to-point
Speed (Maximum) — 19.2 kbps
Interface — Centronics® type parallel
Connectors — (1) DB25 F, (1) 5-screw terminal block
Power — 115 VAC, 60 Hz (230-VAC version on request)
Size — 1.5“H x 4.3“W x 4.5“D (3.8 x 10.9 x 11.4 cm)
Weight — 1.3 lb. (0.6 kg)

NOTE: Must be used in pairs (one transmitter, one receiver) or with the Short-Haul Modem–B Async (ME800A-R3).

These products work with:
• GigaBase® 350 CAT5e, 350-MHz Bulk Cables, 4-Pair (EYN851A)
Questions? Contact Tech Support.
Also works with:
• Short-Haul Modem–B Async (ME800A-R3)
The card versions also work with:
• Short-Haul Modem–B Racks (RM007, ME810)
Questions? Contact Tech Support.

　

★★★★商品規格描述★★★★

Black Box Explains...How a line driver operates..

Driving data? Better check the transmission.

Line drivers can operate in any of four transmission modes: 4-wire full-duplex, 2-wire full-duplex, 4-wire half-duplex, and 2-wire half-duplex. In fact, most models support more than one type of operation.

So how do you know which line driver to use in your application?

The deal with duplexing.
First you must decide if you need half- or full-duplex transmission. In half-duplex transmission, voice or data signals are transmitted in only one direction at a time, as in a CB radio conversation. In full-duplex operation, voice or data signals are transmitted in both directions at the same time, as in a telephone conversation.

The entire bandwidth is available for your transmission in half-duplex mode. In full-duplex mode, however, the bandwidth must be split in two because data travels in both directions simultaneously.

Two wires or not two wires? That is the question.
The second consideration you have is the type of twisted-pair cable you need to complete your data transmissions. Generally you need twisted-pair cable with either two or four wires. Often the type of cabling that’s already installed in a building dictates what kind of a line driver you use. For example, if two twisted pairs of UTP cabling are available, you can use a line driver that operates in 4-wire applications, such as the Short-Haul Modem-B Async or the Line Driver-Dual Handshake models. Otherwise, you might choose a line driver that works for 2-wire applications, such as the Short-Haul Modem-B 2W or the Async 2-Wire Short-Haul Modem.

If you have the capabilities to support both 2- and 4-wire operation in half- or full-duplex mode, we even offer line drivers that support all four types of operation.

As always, if you’re still unsure which operational mode will work for your particular applications, consult our Technical Support experts and they’ll help you make your decision.