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Switch SW6: Clock Mode
Set Switch SW6 to determine the 2710’s transmitter timing.
SW6 Clock Mode
Off
Network Clock
. Transmitter timing is
derived from the received line signal.
On
Internal Clock
. Transmitter clock is
derived from an internal oscillator.
NOTE: When using the Model 2710 as a high-speed short range
modem, one unit of the link must be configured in Internal Clock
mode, and the opposite end unit must be configured for Network
Clock mode.
Switches SW7 and SW8: Line Build Out
Use Switches SW7 and SW8 to set the Line Build Out (LBO). The
Line Build Out varies the pulse shape and attenuation of the signal
sent to the network. The amount of Line Build Out depends on
NetLink™ T1’s distance to the last repeater. The telephone company
providing the service will advise on the amount of LBO necessary.
SW6 SW7 Function
Off Off 0-133 ft (0dB)
On Off -7.5dB
Off On -15.0dB
On On -22.5dB
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3.2 SOFTWARE CONFIGURATION
The NetLink-T1™ features a menu-driven command system that
allows you to monitor/configure its operating parameters. Follow the
instructions below to configure the Model 2710 using the software
switches:
1) Plug the 9-pin male end of the cable to your terminal or com-
puter’s DB-9 serial port and start up the terminal emulator
software if necessary. Plug the miniature stereo plug into the
rear of the unit. The small recessed jack on the right side of
the unit is the control port jack.
NOTE: If your terminal uses a DB-25 connector, please use a
DB-9 to DB-25 Adapter to connect to the cable (See Model
18PC-M).
2) Power up the terminal and set its RS-232 port as follows:
9600 Baud
8 data bits, 1 stop bit, no parity
Local echo off
ANSI or VT-100 emulation
3) Here is an example of a terminal emulator setup session. In
normal font are the various parameter types. In bold type are
the values that should be used for best results. Your terminal
program’s setup screen may differ from this one:
Baud rate: 9600 Parity: None Data Length: 8 Stop Bits: 1
Default terminal type: VT100
Local Echo: Off
Add Line Feeds after CRs: Off
Received Backspace Destructive: On
Backspace key sends: BS
XON/XOFF software flow control: On
CTS/RTS hardware flow control: Off
DSR/DTR hardware flow control: Off