Black Box TL576A, Руководство пользователя

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The V.11 LS utilizes an ITU V.11 (X.21) balanced interface with a maximum data rate of up
to 10Mbps. Additionally, V.11 can support data transmissions at far greater cable distances
than does RS-232. The
V.11 LS can support an unlimited amount of receive only terminals
simultaneously.
Figure 1-1 Typical V.11 LS Application
LEASED LINE
MODEM MODEM
V.11 LS
TERMINAL
V.11 LS
HOST
V.11 BALANCED
INTERFACE
SUPPORTS RS-422/449
V.35, RS-530, RS-485
AND X.21
ONE WAY DATA PATH TO TERMINALS
The V.11 LS's master port has tandem DB-15 connectors. This allows a dedicated input
port and an additional port for cascading without losing a sub-channel port. The V.11 LS
continuously broadcasts receive data, receive timing and Indicate (any user defined control
signal from the main input data source may be used). The input signals are split with the
internal circuitry and rebroadcast on the eight output ports.
The V.11 LS is housed in a sturdy aluminum enclosure and is supplied with an internal
linear power supply. The unit has a 110/220 VAC rotary select switch located on the rear of
the housing. The unit can operate on standard AC power found in all countries.
CHAPTER 1 - DESCRIPTION
1.1 FUNCTIONAL DESCRIPTION
The V.11 LS is designed for use in receive only data broadcast applications. Examples of
typical data broadcast applications are: continuously updated private or public data dis-
plays and distribution of continuous data to PCs or receive only printers. The role of VSAT
systems in receive only applications for real time data distribution is expected to increase
dramatically over the next few years. The
V.11 LS is an excellent choice for applications of
this type.
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