Black Box ME260A, Owner'S Manual

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CHAPTER 3: Installation
NOTE
The functions of all the following jumpers are used only in the ME
(modem eliminator) mode.
CARRIER-2, JP5 (ME mode only)
• ON—The DCD line in connector J2 is continuously on.
• CTRL—The DCD line in connector J2 tracks the RTS line in connector J1.
The Modular Modem Eliminator is shipped with the jumper set at ON.
CARRIER-1, JP4 (ME mode only)
Same as JP5 for the DCD line in connector J1.
XMT TIMING, JP3 (ME mode only)
Selects the timing source in the ME mode:
• INT—Modular Modem Eliminator internal oscillator. The data rate
is determined by the RATE selector.
• EXT J1—The transmit clock applied to connector J1. The data rate
equals the clock rate.
The Modular Modem Eliminator is shipped with the jumper set at INT.
DELAY 1, JP2 (ME mode only)
Selects the delay between the activation of the RTS line in connector J1 and the
activation of the CTS line in the same connector. The available selections are 0, 6,
and 51 ms.
The Modular Modem Eliminator is shipped with the jumper set at 0 ms.
DELAY 2, JP1 (ME mode only)
Same as JP2 for connector J2.