Nortel Networks 553-3901-200 instruction manual Connect clock reference cables

Page 40 of 46 Install ISDN BRI hardware

Connect clock reference cables

The following procedure should be followed to connect the ISDN BRI clock reference cables to the Clock Controller. There are three different cables that route clock signals from the IPE back plane to the Clock Controller face plate (as shown in Figure 11). These are shown in Table 7.:

Table 7

ISDN BRI clock reference tables

Code	Length (feet)	Use
NTND70AA	1.5	Connects IPE back plane to
		IPE I/O panel.
NTND71AA-AD	6.5, 12, 25, 42	Connects IPE I/O to CE I/O
		panel.
NTND72AA	6.5	Connects CE I/O to Clock
		Controller face plate.

Note: Measure the distance between the IPE and CE modules to ensure that you order the correct cable lengths.

1Search for available D-sub 9 connector slots on the I/O panels of the selected IPE and CE I/O modules (if the I/O panel is equipped with D-sub 9 connector slots). If none is available, look for an empty slot used for 25 pair wire connectors (the cables contain two adapter plates to convert an 25 wire slot to two D-sub 9 connector slots).

2Connect the cables as shown in Figure 11; if choosing IPE slots 0, 4, 8, or 12 the transmit and receive cable installed on pins 72 - 79 should be removed and secured to a proper place.

553-3901-200 Standard 7.00 January 2002