Black Box PCW22A-R3 Preparing the A/S-2G for Connection to a Synchronous Device, Carrier Options

PROTOCOL CONVERTER A/S-2G

3.3.5 CARRIER OPTIONS

If the carrier detect signal is to be driven by the A/S-2G configuration (DCE), the jumper labeled CAR A ENB must be installed. CAR A ENB is located below U20. Refer to the printed circuit board, Figure 5-2, on page 28.

The carrier control jumper, CARR A, in between U18 and U19 on the circuit board (See Figure 5-2 on page 28) should be set as follows:

(a)continuous carrier—place the jumper over the ON position.

(b)switched carrier equal to the RTS signal from the A/S-2G—place the jumper over the CNT position.

If the A/S-2G asynchronous port is configured as DCE, place a jumper over CAR A ENB and place the CARR A jumper over ON.

3.3.6 CABLE REQUIREMENT

Use an RS-232 cable which is pinned straight through, i.e. 1 to 1, 2 to 2, 3 to 3, etc., to connect the A/S- 2G’s asynchronous port to the modem, terminal, or CPU. Leads 1 through 8 and 20 are required (see Section 5.3 on page 25).

3.4 PREPARING THE A/S-2G FOR CONNECTION TO A SYNCHRONOUS DEVICE

The synchronous port (Port B) is designed to connect to a synchronous modem, modem eliminator, or terminal. Set the switches, shunts, and jumpers as described below, then plug a male RS-232 connector into the A/S-2G’s female receptacle. Sex-change adapters, connectors, and cable are available if you need them.

PORT B (Synchronous) BAUD RATE

Rate	5	6	7	8	Rate	5	6	7	8
EXT	OFF	OFF	OFF	OFF	1800	ON	OFF	OFF	OFF
75	OFF	OFF	OFF	ON	2000	ON	OFF	OFF	ON
110	OFF	OFF	ON	OFF	2400	ON	OFF	ON	OFF
134.5	OFF	OFF	ON	ON	4800	ON	ON	OFF	OFF
150	OFF	ON	OFF	OFF	7200	ON	ON	OFF	ON
300	OFF	ON	OFF	ON	9600	ON	ON	ON	OFF
600	OFF	ON	ON	OFF	19200	ON	ON	ON	ON
1200	OFF	ON	ON	ON

Table 3-2. Port B (Synchronous) Baud Rates.

3.4.1 DATA TERMINAL READY (DTR) SIGNAL OPTIONS

The synchronous port DTR option control is a jumper labeled DTR B. It is just under U26 on the circuit board. (See Figure 5-2 on page 28.) Placing the jumper over ON maintains a constant high signal on DTR. When this jumper is placed over CNT, the A/S-2G will drop DTR during a reset or after receipt of a DLE EOT sequence from either the synchronous or the asynchronous port.

For most installations, position the jumper over ON.

3.4.2 CLEAR TO SEND (CTS) SIGNAL OPTIONS

The synchronous port CTS option control is a jumper labeled CTS B. It is located between U21 and U25 on the circuit board. (See Figure 5-2 on page 28.) Placing the jumper over ON maintains a constant high signal on CTS. When this jumper is placed over CNT, the A/S-2G will raise RTS when

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