Black Box RS-232 Modem Sharing Device Buffered

Black Box RS-232 Modem Sharing Device Buffered - Concentrator - 4 ports - external

Item#:  9757287  | Model#: TLB704A

Currently Out Of Stock!

You May Consider This Alternative

Black Box RS-232 Modem Sharing Device Buffered Product Details

Expand existing, leased line, polled networks without adding computer ports or communications links. Multiple terminals can share the same port and communications link using the contention and control protocols normally resident in the host hardware and software. The device increases system and network efficiency through higher host processor use coupled with the significant decrease in idle time between host / terminal traffic sessions. TLB704A is a buffered model, which uses an 8-bit buffer to prevent data transmission errors caused by clock differentials throughout the network. In applications where the master port and the selected port provide their own clocks, data is clocked into the buffer at the receive clock rate of the active port and clocked out using the master port transmit clock.


   Device Type:  Concentrator
   Form Factor:  External

   Ports Qty:  4
   Connectivity Technology:  Wired
   Data Transfer Rate:  128 Kbps
   Data Link Protocol:  RS-232
   Status Indicators:  Power, active, transmit, receive
   Features:  15 KV Electrostatic Discharge Protection, cascadable, built-in DIP switch

Expansion / Connectivity
   Interfaces:  5 x RS-232 - DB-25

   Compliant Standards:  UL 1950, CSA C22.2

   Power Device:  Internal power supply
   Voltage Required:  AC 120/230 V
   Frequency Required:  50/60 Hz

Manufacturer Warranty
   Service & Support:  Limited warranty - 3 years

Dimensions & Weight
   Width:  17 in
   Depth:  9 in
   Height:  1.7 in
   Weight:  4.63 lbs

Environmental Parameters
   Min Operating Temperature:  32 °F
   Max Operating Temperature:  122 °F
   Humidity Range Operating:  5 - 95% (non-condensing)
  • Manufactured by: Black Box Corporation
    Warranty provided by: Black Box Corporation
    UPC No:
    Mfg Part No: TLB704A
  • Box Size: ( Length:0, Width:0, Depth:0)
    Shipping Weight: 14.0721 pound(s)
    Click here for full warranty and support information
  • Black Box Corporation logos are registered trademarks of Black Box Corporation. All others trademarks and copyrights mentioned herein are the property of their respective owners.
Plus get insider deals first, exclusive promotions and more!
Sponsored by: