RJS can be used to connect two 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).

	Tip
	Interesting chapter: Section 3.8.2, “Connection cables”.

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:

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:

A call from the ISDN line reaches directly the PBX.

	Tip
	Interesting chapters: Section 3.8.2, “Connection cables”; Section 2.8, “Abilis PCI boards and extension boards”; Section 72.1, “How to configure ISDN ports to connect PBX or ISDN 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
	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're used by Abilis MAIN.

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

	Caution
	RJS isn't suitable to connect HDSL lines with V35 interfaces.

	Tip
	Interesting chapters: Section 3.8.2, “Connection cables”; Section 2.9.1, “ADSL modem”; Section 71.7, “How to configure ADSL connections using USB modems”; Chapter 11, ADSL modem.

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:

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 the M1 and so Abilis MAIN is connected to the router.

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

	Tip
	Interesting chapters: Section 3.8.2, “Connection cables”; Chapter 14, RJS - RJ Switch; Section 2.8.12, “Ethernet”; Section 71.1, “How to configure LAN settings”; Section 71.2, “How to activate a new Ethernet port”; Section 20.3, “IP Resources”.

RJS can be used to switch ELTI (External LVDS TDM interface) lines. The ELTI port uses all 8 pins unlike the RJS, which uses only central pins 4,5 and 3,6 (remaining pins 1,2 and 7,8 are not connected). For this reason to switch a ELTI line will be required 2 RJS ports.

When Abilis MAIN is up, the ELTI line are connected to M1 and M2, so they're used by Abilis MAIN.

When Abilis MAIN us down, the ELTI line are switched to B1 and B2 and they're connected to Abilis BACKUP.

	Note
	For POTSBOX is recommended to use a separate power supply, not from ABILIS.

	Tip
	Interesting chapters: Section 3.8.2, “Connection cables”; Chapter 14, RJS - RJ Switch; Section 2.10.1, “POTSBOX”; Chapter 10, POTSBOX; Section 3.9, “POTSBOX connection”; Section 46.2.2, “Analog Ports configuration (POTS)”.