help • 15 ISDN connections • Installation of the ISDN Cards • Preparation of the SX2 SinglePRI
15.2.3 Preparation of the SX2 SinglePRI
The connection configuration and the line termination must be configured for each E1 connection of the SX2 SinglePRI before it is inserted.
Requirement for further description: The SX2 SinglePRI is laying in front of you with the PCI plug strip facing down and the E1 connections to the left.
Two jumper fields, which are in the near vicinity of the E1 connection plug, are assigned to the E1 connection. In the following, the field with two jumpers will be referred to as SB2 and the field with five jumpers will be referred to as SB5. The suffixes L and R indicate whether all jumpers of the respective jumper field are inserted to the left (L) or to the right (R). SB5R means, for example, that all jumpers of the SB5 field are inserted on the right.
Connection Configuration
The connection configuration allows the E1 connection to be adapted to four different cable assignments.
Occupation of the Plug Bridges
Pin configuration, RJ45 jack
SB2L and SB5R
Pin1 = TX+
Pin2 = TX-
Pin4 = RX+
Pin5 = RX-
SB2R and SB5R
Pin3 = TX+
Pin6 = TX-
Pin4 = RX+
Pin5 = RX-
SB2L and SB5L
Pin1 = RX+
Pin2 = RX-
Pin4 = TX+
Pin5 = TX-
SB2R and SB5L
Pin3 = RX+
Pin6 = RX-
Pin4 = TX+
Pin5 = TX-
Configuration of the Line Termination
On the right next to the plug bridge fields for the E1 connection you will find a two-pole DIP switch with which the line termination can be configured.
*If both pins of the switch are in the "OFF" position, no termination is switched on.
*If the left pin is on the "OFF" position and the right pin is on the "ON" position, this means that this has a 120 ohm line termination.
*If the left pin is on the "ON" position and the right pin is on the "OFF" position, this means that this has a 75 ohm line termination.
Configuration of the PCI bus power supply
On the lower right side of the SX2 SinglePRI is a three-pole jumper field for setting the PCI bus power supply.
Make sure that the jumper is at the correct setting for the computer's main board.
Lower for an environment with 3V, upper for an environment with 5V, which will be found on older main boards.
Configuration of the card number
You can set the card number with the four-pole DIP switch in the upper middle of the SX2 SinglePRI.
* 
Please keep in mind that SX2 SinglePRI V2 and V3 only differ in the configuration of the card number.
 
 
For SX2 SinglePRI V2 the following assignment is valid:
Switch 1
Switch 2
Switch 3
Switch 4
Card number
off
off
off
on
1
off
off
on
off
2
off
off
on
on
3
off
on
off
off
4
off
on
off
on
5
off
on
on
off
6
off
on
on
on
7
on
off
off
off
8
on
off
off
on
9
on
off
on
off
10
on
off
on
on
11
on
on
off
off
12
on
on
off
on
13
on
on
on
off
14
on
on
on
on
15
off
off
off
off
assigned automatically
For SX2 SinglePRI V3 the following assignment is valid:
Switch 1
Switch 2
Switch 3
Switch 4
Card number
on
off
off
off
1
off
on
off
off
2
on
on
off
off
3
off
off
on
off
4
on
off
on
off
5
off
on
on
off
6
on
on
on
off
7
off
off
off
on
8
on
off
off
on
9
off
on
off
on
10
on
on
off
on
11
off
off
on
on
12
on
off
on
on
13
off
on
on
on
14
on
on
on
on
15
off
off
off
off
assigned automatically
* 
If you use several cards in one system, please make sure that either one card number was assigned for all cards, or automatic card number assignment is set for all cards.
 
PCM bus connection
The card has two 20-pole jacks for connection with an optional PCM cable.
The upper jack is the output. The lower jack is the input. Connect the SX2 cards with the PCM cable by connecting the output jack of a SX2 card with the input jack of another SX2 card.
LED Status Display
The E1 connection of the SX2 SinglePRI has a status display consisting of two red and two green LEDs.
The following assignments are valid:
LED
LED
Statement
1
off
Layer 1 deactivated
1
red glowing
Layer 1 activated
2
green glowing
Layer 2 activated
3
green, blinking
At least one connection is active
4
red, blinking
The line is being configured