3.8. RJS connection

Figure 3.11. RJS front view

RJS front view

Figure 3.12. RJS rear view

RJS rear view

The following figure explains how to connect the ports:

Figure 3.13. RJS ports

RJS ports

Follow the steps below to connect a RJS:

Figure 3.14. Connecting RJS

Connecting RJS

[Tip]Tip

Interesting chapters:

Section 3.8.2, “Connection cables”;

Chapter 14, RJS - RJ Switch;

Section 2.9.5, “RJ Switch”.

3.8.1. Connection examples

Before reading examples just keep in mind the following notes:

  • only the central pins 4,5 and 3,6 are switched

  • pins 1,2 and 7,8 are not connected

3.8.1.1. How to use a backup Abilis to increase the reliability

RJS can be used to connect two Abilis:

  • a main Abilis

  • a backup Abilis

The backup device is always in idle unless the master crashes. The following is the scheme to use:

When Abilis MAIN is up the isdn line is connected to M1 and so to ctip port #33 of Abilis MAIN. A call is routed through the port #31 connected to M2, so it reaches the PBX (L2).

When Abilis MAIN is down, L1 is automatically switched on B1 (which is connected to ctip port #33 of Abilis BACKUP) and L2 is switched on B2. A call is routed through the port #31 (of Abilis BACKUP) connected to B2, so it reaches the PBX (L2).

3.8.1.2. How to connect an ISDN line

RJS can be used to automatically bypass Abilis when it's down and connect an ISDN line directly to a PBX.

The following is the scheme to use:

When Abilis is up:

  • the ISDN line is connected to ctip #33 because L1 is switched on M1

  • the PBX is connected to ctip #31 because L2 is switched on M2.

A call from the ISDN line reaches Abilis which routes it through the port #31, so the call reaches the PBX.

When Abilis is down:

  • the isdn line is connected directly to PBX, because L1 is switched on B1 and L2 is switched on B2

A call from the ISDN line reaches directly the PBX.

3.8.1.3. How to connect ADSL lines

RJS can be used to switch ADSL lines. Up to 2 ADSL lines can be connected to a single port because only the central pins 4,5 and 3,6 are switched (remaining pins 1,2 and 7,8 are not connected).

[Note]Note

There must be one ADSL modem for one line and one ADSL modem for each Abilis (MAIN and BACKUP). So four modems are needed to connect two adsl lines to RJS having two Abilis (MAIN and BACKUP).

Use the following scheme to connect 2 adsl lines:

When Abilis MAIN is up, the ADSL lines are connected to M1, so they are used by Abilis MAIN.

When Abilis MAIN us down, the ADSL lines are switched to B1 and they are connected to Abilis BACKUP.

[Caution]Caution

RJS is not suitable to connect HDSL lines with V35 interfaces.

3.8.1.4. How to connect Ethernet cables.

RJS can be used to connect ethernet cables knowing that:only central pins 4,5 and 3,6 are switched (remaining pins 1,2 and 7,8 are not connected). So:

  • ethernet cables which use pins 1,2 and 7,8 can't be connected

  • ethernet cables can be connected but adapter cables must be used.

The adapter cable must be made so that pins 1,2 are connected to pins 3,6 and pins 4,5 remain connected to pins 4,5.

When Abilis MAIN is up, the cross cable is switched on M1 and so Abilis MAIN is connected to router.

When Abilis MAIN is down, the cross cable is switched to B1 and so Abilis BACKUP is connected to router.

3.8.2. Connection cables

The following cables must be used to connect to RJS.

Figure 3.15. ISDN BRI and PRI cable

ISDN BRI and PRI cable

Figure 3.16. Ethernet cable

Ethernet cable

Figure 3.17. ADSL cable

ADSL cable