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Black Box RS-232 Modem Sharing Device, Buffered 4-Port








 SKU:1026884908
 Manufacturer:Black Box Corporation
 Part number:TLB704A
 Availability:No
 Our Price: $680.30
 

 


  

  • DCE/DTE selectable.
  • Internal or external clocking.

The Buffered Modem Sharing Device is a network expansion device for modem sharing or port sharing applications in polled or contention environments. It allows up to four devices to share a modem/DSU or computer port. Any combination of terminals and modems may be used in a network environment.

Each port may be selected as a DCE or DTE interface. 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.

Ideal for either synchronous or asynchronous network environments, the Sharing Device is protocol transparent at data rates up to 128 Kbps. It may be configured to provide clocking for the entire network. To prevent data transmission errors caused by clock differentials throughout the network, an 8-bit buffer is provided. 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.

In applications where the Clear To Send control signal is not provided by the master port, an artificial RTS/CTS is available. Additionally, several RTS/CTS delay settings are available.

The Buffered Modem Sharing Device provides optional Anti-Streaming circuitry. Once enabled, Anti-Streaming will automatically remove a defective terminal or modem from service if the Data / Control criteria is present for the user predefined selection period.

Housed in a sturdy metal enclosure and equipped with an internal 110/220VAC switch selectable linear power supply, the DMM-4 will provide in excess of 100,000 hours of reliable service.





Manufacturer
Black Box Corporation

Manufacturer Part Number
TLB704A

Manufacturer Website Address
http://www.blackbox.com

Brand Name
Black Box

Product Name
RS-232 Modem Sharing Device, Buffered 4-Port

Product Type
Line Sharing Device

Height
1.8"

Width
17"

Depth
9"

Weight (Approximate)
4.50 lb

Package Contents
  • RS-232 Modem Sharing Device, Buffered 4-Port
  • 1 x power cord
  • Manual

Country of Origin
United States

Manufacturer
Black Box Corporation

Manufacturer Part Number
TLB704A

Manufacturer Website Address
http://www.blackbox.com

Brand Name
Black Box

Product Name
RS-232 Modem Sharing Device, Buffered 4-Port

Product Type
Line Sharing Device

Input Voltage
  • 110 V AC
  • 220 V AC

  • Height
    1.8"

    Width
    17"

    Depth
    9"

    Weight (Approximate)
    4.50 lb

    Package Contents
    • RS-232 Modem Sharing Device, Buffered 4-Port
    • 1 x power cord
    • Manual

    Country of Origin
    United States