Patton electronic 1090 user manual Switch SET S2, Connection to the Twisted Pair Interface, Signal

S1-8: V.54 Enable / Disable

The setting for switch S1-8 determines whether the Model 1090 will respond when it receives the V.54 sequence. If you suspect the Model 1090 may be getting tricked into the loopback test by false detection of user data, you can try setting this to “Disable.”

S1-8	Setting
On	Disabled
Off	Enabled

SWITCH SET S2

The settings for DIP switches S2-1 through S2-4 determine the synchronous data rate of the Model 1090. All possible settings (including the default) are shown below:

S2-1	S2-2	S2-3	S2-4	Setting
Off	Off	Off	On	48 kbps
Off	Off	On	Off	56 kbps
Off	Off	On	On	*64 kbps
Off	On	Off	Off	72 kbps
Off	On	Off	On	80 kbps
Off	On	On	Off	112 kbps
Off	On	On	On	128 kbps
On	Off	Off	Off	144 kbps
On	Off	Off	On	160 kbps
* Default Setting

4.0 INSTALLATION

Once the Model 1090 is properly configured, it is ready to connect to the twisted pair interface, to the serial port, and to the power source. This section tells you how to make these connections.

4.1 CONNECTION TO THE TWISTED PAIR INTERFACE

The Model 1090 supports communication between two terminal devices at distances to 11 miles and data rates to 160 kbps. There are two essential requirements for installing the Model 1090:

1.These units work in pairs. Therefore, you must have one Model 1090 (or a compatible model) at each end of a two twisted pair interface.

2.To function properly, the Model 1090 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-equalization equipment, or standard, flat modular telephone type cable, are not acceptable.

4.1.1TWISTED PAIR CONNECTION USING RJ-45

The Model 1090 uses a modular RJ-45 jack for twisted pair line connection. The signal/pin relationships are shown below:

RJ-45	SIGNAL
1	XMT+
2	XMT-
3	N/C	1
		2
4	GND*	3
		4
5	GND*	5
6	N/C	6
		7
7	RCV+	8
8	RCV-
*Connection to ground is optional

7 8