Patton electronic 2720/I Series user manual DTE Interface Connection, Network Interface Connection

Loop Timeout

The Loop Timeout setting can be set to one of the following:

00:05 =	five minutes
00:10 =	ten minutes
00:15 =	fifteen minutes
00:30 =	thirty minutes (default setting)
00:45 =	forty-five minutes
01:00 =	one hour
01:30 =	90 minutes
02:00 =	two hours
03:00 =	three hours
NEVER =	foreverÑthe unit will remain in loopback without user
	intervention.

Tx Data Clock

This option selects the clock that is used to accept the Transmit Data from the DTE interface. Standard DTE interfaces will transmit data with respect to the External Clock. In some cases a DTE interface will transmit with respect to the Transmit clock sent out from the 2720. Please review the information provided with your DTE equipment for more information on its' operation. In most cases when there are errors on the line only in the direction of the transmit data either Tx Data Clock or Tx Clock Invert can be changed to solve the problem.

Tx Clock Invert

This option allows the user to invert the transmit clock originating in the 2720. When Tx Data Clock is set for transmit clock, it may be necessary to invert the transmit clock to allow for cable delays.

Set to Default Configuration

You may set the NetLink-T1ª to its factory default configuration, except for the header lines and the password, by executing the Set to Default Configuration command.

4.0INSTALLATION

The Model 2720 is equipped with DTE, network, and power inter- faces. This section briefly describes connection to each.

4.1 DTE INTERFACE CONNECTION

The DTE interface is a V.35 DCE presented as an M/34 male con- nector. This interface is designed to plug directly into a DTE interface (See Appendix D for V.35 interface pin assignments).

4.2 NETWORK INTERFACE CONNECTION

The Network Line Interface is an eight position keyed modular jack configured as a RJ-48C. This interface will need to be configured to match the line parameters (i.e. framing, line coding, etc.) supplied by the central office.

		1	RX Data (TIP)	} From Network
		2	RX Data (RING)
	1
	2	3	(no connection)
	3			} To network
	4	4	TX Data (TIP)
	5	5	TX Data (RING)
	6
	7	6	(no connection)
	8
		7	(no connection)
		8	(no connection)
Figure		2. Model 2720 twisted pair line interface.

NOTE:

If the Model 2720 is being used for private short range modem applications, the twisted pair cable connected to its port will need to be a crossover cable. See Appendix D for Interface pin assignments.

4.3 DC POWER SUPPLY

The 36-60 VDC DC to DC adapter is supplied with the DC version of the Model 2720. The black and red leads plug into a DC source (nomi- nal 48VDC) and the barrel power connector plugs into the barrel power supply jack on the 2720.

To Power

Supply Jack

Barrel power connector

MADEINCHINABYSUNNY	:G01234567890S/N	OUTPUTPOWER:5WMAX	OUTPUT:+5V1.0A	INPUT:36-60V0.2AMAX	MODEL:SYD1106-0505	SWITCHINGPOWERSUPPLY		To -48VDC
							-Vin	Source
							+Vin

Black lead (-V)

Red lead (+V)

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