Black Box RS-232 Modem Sharing Device
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Black Box RS-232 Modem Sharing Device
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Black Box RS-232 Modem Sharing Device - Concentrator - 8 ports - external

Item#:  9757264  | Model#: TL708A
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Black Box RS-232 Modem Sharing Device Product Details

This Modem Sharing Device (MSD) provides the network manager with a cost-effective way of expanding existing, leased-line, polled networks without adding computer ports or communications links. Up to eight terminals can share the same port and communications link using the contention and control protocols normally resident in the host hardware and software. Once installed, system and network efficiency are increased through higher host processor utilization coupled with the significant decrease in idle time between host / terminal traffic sessions. MSDs are ideal for either synchronous or asynchronous network environments. Data arriving at the master port is continually broadcasted to all subchannels. The attached terminal device that raises the RTS control signal is automatically given control of the MSD until data transmission is complete. Clocking is accomplished from the attached modem. Housed in a sturdy metal enclosure and equipped with an internal switch-selectable linear power supply, the MSDs provide extremely reliable service.


   Device Type:  Concentrator
   Form Factor:  External

   Ports Qty:  8
   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

Expansion / Connectivity
   Interfaces:  9 x RS-232 - DB-25

   Compliant Standards:  EN 60950, EMC, CAN/CSA C22.2 No. 60950-1, UL 60950-1:2003
   TAA Compliant:  Yes

   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:  13 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: 009859425226
    Mfg Part No: TL708A
  • 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.
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