Transition Networks SSDTF1022-105, SSDTF1027 Installation -- Continued, Set the loop-back switch

SSDTF10xx-10x

Installation -- Continued

Set the loop-back switch

Hardware mode:

The loop-back switch is located on the front panel of the device and is used for installation and network debugging procedures.

To set the switch, use a small flat-blade screwdriver or a
			CL	FL
similar device (see the drawing to the right).
CL	(Copper loop-back)	Enable loop-back on the
		local copper interface.
--	(Center Position)	Normal operation.
FL	(Fiber loop-back)	Enable loop-back on the local fiber interface.

Software mode:

If both Devices are under software control, the network administrator can initiate the loop-back test function on the copper interface (local or remote) or on the fiber interface (local or remote). These four loop-back test scenarios are described in detail on page 14.

Installation -- Continued

Switch 1, Copper -- transmit all ones

UP - Disables the transmit all ones function on the copper interface.

DOWN - Transmits an “all ones” pattern on the copper interface when the signal detect on the fiber interface is lost.

Switch 2, Fiber -- transmit all ones

UP - Disables the transmit all ones function on the fiber interface.

DOWN - Transmits an “all ones” pattern on the fiber interface when the signal detect on the copper interface is lost.

1

Copper - Transmit All Ones - Disabled

Copper - Transmit All Ones - Enabled

2

Fiber - Transmit All Ones - Disabled

Fiber - Transmit All Ones - Enabled

Set the configuration switches

SelectT1 configuration (switches 3 & 4, left set, SW2)

Use switches 3 and 4 to configure the device for T1 configuration.

The configuration switches are located on the side of the device and are used to configure the device for various network conditions.

The switches are labeled 1 through 8 on the device housing top. There are two sets (a “left, SW 2” and a “right, SW 1”) each with four switches labeled 1 through 4 (see the drawing below).

			Config
			Switches
1	2	3	4	5	6	7	8	Cover Top		UP
Rear								Cable End	Key:	Not Used

				DOWN
1 2 3 4		1 2 3 4	Switch Numbers
	SW 2	SW 1

Switch 3, long haul/short haul (T1 only)

UP - Short haul.

DOWN - Long haul.

Switch 4, T1 / E1

UP - T1 configuration.

Set switches 1, 2, 3, and 4 on the right set for the required network cable settings (see pages 6 and 7).

3

Short Haul (T1 only)

Long Haul (T1 only)

4 1 2 3 4

T1 Configuration

Use a small, flat-blade screwdriver or a similar device to set the recessed switches.

Transmit all ones (switches 1 & 2, left set, SW 2)

The Transmit All Ones function allows the insertion of an “all ones” pattern on the copper and/or fiber interface when the signal detect is lost, creating an alarm condition at the device connected to the interface.

Select E1 configuration (switch 4, left set, SW 2)

Use switch 4 to configure the device for E1 configuration.

Switch 4, T1 / E1
DOWN- E1 configuration.	3 4	1 2 3 4
The default network cable setting is 3.0 V,
120 ohm.
	E1 -- 3.0 V 120 ohm cable
Switch 3 on the left set and switches 1, 2, 3,
and 4 on the right set are disabled.

4 . 5