TCM Port (RJ21) Pinout

TCM ports are found on IP500 Digital Station 16A/30A external expansion modules, and supported by IP500 V2 systems running IP Office Release 7.0 and higher. TCM ports are used for supported M-Series and T-Series digital stations. Also used for 4100 and 7400 Series phone support by connection to a Digital Mobility Solution system.

Cable lengths up to 305 m (1000 ft) using 0.5mm (24AWG) wires do not require a power booster. For TCM phones, lengths up to 790 m (2600 ft) are supported if an auxiliary power supply booster is used.

1st RJ21 Connector:

Pin	Wire colour	Port
26 1	White-Blue Blue-White	1
27 2	White-Orange Orange-White	2
28 3	White-Green Green-White	3
29 4	White-Brown Brown-White	4
30 5	White-Slate Slate-White	5
31 6	Red-Blue Blue-Red	6
32 7	Red-Orange Orange-Red	7
33 8	Red-Green Green-Red	8
34 9	Red-Brown Brown-Red	9
35 10	Red-Slate Slate-Red	10
36 11	Black-Blue Blue-Black	11
37 12	Black-Orange Orange-Black	12
38 13	Black-Green Green-Black	13
39 14	Black-Brown Brown-Black	14
40 15	Black-Slate Slate-Black	15
41 16	Yellow-Blue Blue-Yellow	16
42 17	Yellow-Orange Orange-Yellow	Not Used
50 25	Violet-Slate Slate-Violet	"

2nd RJ21 Connector:

Pin	Wire colour	Port
26 1	White-Blue Blue-White	1
27 2	White-Orange Orange-White	2
28 3	White-Green Green-White	3
29 4	White-Brown Brown-White	4
30 5	White-Slate Slate-White	5
31 6	Red-Blue Blue-Red	6
32 7	Red-Orange Orange-Red	7
33 8	Red-Green Green-Red	8
34 9	Red-Brown Brown-Red	9
35 10	Red-Slate Slate-Red	10
36 11	Black-Blue Blue-Black	11
37 12	Black-Orange Orange-Black	12
38 13	Black-Green Green-Black	13
39 14	Black-Brown Brown-Black	14
40 15	Black-Slate Slate-Black	Not Used
41 16	Yellow-Blue Blue-Yellow	"
42 17	Yellow-Orange Orange-Yellow	"
50 25	Violet-Slate Slate-Violet	"