Toshiba CTX28 manual Station-Side Cabling, Call Monitor Jack Cabling

ISDN Interfaces

RBUU/RBUS Interface Unit

Table 7-14 Four-Pair with RJ45 Demarc Jack Coding

Conductor		Color		T56A Pin		T56B Pin	Use
	Pair 1	White-Blue		5		5	Line 1
Blue		4		4	Line 1
	Pair 2	White-Orange		3		1	Line 2
Orange		6		2	Line 2
	Pair3	White-Green		1		3	PS3 plus power
		Green		2		6	PS3 minus power
	Pair 4	White-Brown		7		7	PS2 plus power
Brown		8		8	PS2 minus power
	Table 7-15 Three-Pair with RJ11 Demarc Coding
	Conductor		Color		Pin		Use
	Pair 1		White-Blue		4		Line 1
			Blue		3		Line 1
	Pair 2		White-Orange		2		Line 2
			Orange		5		Line 2
	Pair3		White-Green		1		Line 3
			Green		6		Line 3

Notes

●

●

PS2 and PS3 are not used with the Strata CTX BRI-U interface PCBs.

Check with the BRI circuit supplier to determine the pin out of the demarc jacks because some jacks may be wired with two or three BRI-U line circuits each jack.

Station-Side Cabling

•The ISDN BRI U-interface circuits are two-wire on the Strata CTX station-side.

•The maximum distance between the Strata CTX ISDN BRI-U, station-side circuit (LT) and the U-type Terminal Equipment or Terminal Adapter is 18kft.

•The house wiring from the Strata CTX BRI circuit to the wall jack should be made with CAT3~ CAT5 twisted pair wire.

•Each station-side BRI circuit requires a ferrite core as shown in Figure 7-16 on page 7-23.

•The flat satin telephone cord that connects from the wall jacks to ISDN terminal equipment should be no longer than 33 feet.

•BRI station-side cables should not be shielded.

•Polarity of the U interface pair is not critical.

•The U interface pair should go directly from the Strata CTX interface PCB to the U-type TE1 or TA with no bridge taps or loading coils to different locations.

•The pin-out of the RBUU/RBUS BRI jack is shown in Figure 7-25:

Call Monitor Jack Cabling

The pin-out for the BRI-U interface call monitor jack is provided in Figure 7-32of this chapter.

7-32 Strata CTX I&M 06/04