NEC 616 manual MDF Installation 240.1 CO/PBX Connection

240MDF Installation

240.1 CO/PBX Connection

1.The FCC approved USOC number for 50 position

miniature ribbon jack for connection of CO lines is IU21X. The CO lines are to be connected in sequence consecutively within this jack.

+2. Use of 66BSO or 66M50 quick-connect type blocks is

recommended for ease of trouble location and correc- tion. Use of bridging clips allows easy separation of the system to determine cause of trouble.

- - ___-___-_ -.k&+.

3.The following Table 240-1 gives complete information on 50 position connector pin number, lead function,

running cable color, circuit designation, associated DCI/MFI slot:

240.2Station Cabling Connection

1. The following tables give complete information on KSU, cable, 50 position connection pin number, run- ning cable color, lead designation, station cable color, intercom number assignment, KSI-S slot assignment, etc. for all stations. Refer to Table 240-2 and 240-3.

		Table 240-l
	CO/PBX	Connection		Information
	Pl Connector		& Cable	ES-6-l KSU
PIN	FUNCTION	CABLE	COLOR	CiRCIJlT	SLOT
26	1T	WH-BL		CO/PBX
1	1R	BL-WH		1
27	2T	WH-OR		CO/PBX	DCI/MFI 1
2	2R	OR-WH		2
28	3T	WH-GN		CO/PBX
3	3R	GN-WH		3
29	4T	WH-BR		CO/PBX
4	4R	BR-WH		4
	5T	WH -SL		CO/PBX	DCI/.MF12
	5R	SL-WH		5

,

316T

66Fi

The rest of PI Cable is spare and is not used.

CO/PBX Connection:

I.FCC approved connector USOC code is RJ21X.

2.Connector-ended cable for CO/PBX lines to plug info ES-6-I KSU requires Jack (Female) 50 position miniature ribbon connector.

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