Nortel Passport 7400, Hardware Installation, Maintenance, And Troubleshooting, Page: 298 / 438

298 Chapter 37 Hardware procedures
241-7401-240 5.2S1
• BITS is building integrated timing supply
• RX is receive, where the signal goes from the external clock into the
BITS interface
• 0 is BITS-0
• 1 is BITS-1
• P is positive, which for balanced means tip and for unbalanced means
signal
• N is negative, which for balanced means ring and for unbalanced means
ground
8 no connection no connection
9 BITSRX0N BITSRX1N
Table 6
Pinouts of the connectors for E1 unbalanced
Pin E1 unbalanced
for BITS-0 E1 unbalanced for
BITS-1
1 BITSRX0P BITSRX1P
2 BITSRX0N BITSRX1N
Note: E1 unbalanced uses standard coax cables.
Table 5 (continued)
Pinouts of the connectors for DS1 or E1 balanced
Pin DS1 for BITS-0 DS1 for BITS-1
(Sheet 2 of 2)