Patton electronic RS-232 user manual Connection to the Twisted Pair Interface, Signal

SW2-4 and SW2-5: Clock Source

Switches SW2-4 and SW2-5 are set in combination to determine the synchronous clock source for the Model 1035.

SW2-4	SW2-5	Setting
On	On	Internal transmit clock
Off	On	Receive recover clock
On	Off	External transmit clock

SW2-6: Carrier Control Method

The setting for switch SW2-6 determines whether the carrier is “constantly on” or “controlled by RTS”. This setting allows for operation in switched carrier, multipoint and/or hardware handshaking applications.

SW2-6	Setting
Off	Constantly on
On	Controlled by RTS

SW2-7 and SW2-8: RTS/CTS Delay

The combined settings for switches SW2-7 and SW2-8 determine the amount of delay between the time the Model 1035 “sees” RTS and when it sends CTS.

SW2-7	SW2-8	Setting
Off	Off	No delay
On	On	7ms
On	Off	53ms

4.0 INSTALLATION

Once the Model 1035 is properly configured, it is ready to connect to your system. This section tells you how to properly connect the Model 1035 to the twisted pair, RS-232 and V.35 interfaces.

4.1 CONNECTION TO THE TWISTED PAIR INTERFACE

The Model 1035 supports communication between two RS-232 devices or two V.35 devices at distances to 6 miles and data rates to 64 Kbps. There are two essential requirements for installing the Model 1035:

1.These units work in pairs. Therefore, you must have one Model 1035 (or a compatible model) at each end of a two twisted pair interface.

2.To function properly, the Model 1035 needs two twisted pairs of metallic wire. These twisted pairs must be unconditioned, dry, metallic wire, between 19 and 26 AWG (the higher number gauges may limit distance somewhat). Standard dial-up telephone circuits, or leased circuits that run through signal equalization equipment, or standard, flat modular telephone type cable, are not acceptable.

For your convenience, the Model 1035 is available with two different twisted pair interfaces: RJ-11 jack and RJ-45 jack.

4.1.1 TWISTED PAIR CONNECTION USING RJ-11 OR RJ-45

The RJ-11 and RJ-45 connectors on the Model 1035's twisted pair interface are pre-wired for a standard TELCO wiring environment (see Figure 5). The signal/pin relationships are shown on the table on the following page:

RJ-11	SIGNAL	RJ-45	SIGNAL
1	GND†	1	N/C
2	RCV	2	GND†
3	XMT	3	RCV
4	XMT	4	XMT
5	RCV	5	XMT
6	GND†	6	RCV
		7	GND†
		8	N/C

†Connection to ground is optional

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