User guide

229
The Tip and Ring pair carry speech signals at voltages
between 0 and -120 V dc.
Use Category 5 cable to connect the T1/D4 interface
between the T1/E1 port on the T1/E1 MMC and the
central office or leased line. The pinout for these
connectors is defined in Table 33 (page 229). The wires
for the Rx and Tx connector pins should be from the
same color-coded pair within the CAT 5 cable (for
example: orange-white and white-orange).
Table 31: ONS module pinouts
Signal Pin number
Ring 4
Tip 5
Table 32: LS/CLASS module
Pin number Signal
1 to 3 No connection
4 Ring
5Tip
6 to 8 No connection
Table 33: T1 hybrid connector allocation
Signal RJ-45 Connector Pin
RXRING 1
RXTIP 2
Not used 3
TXRING 4
TXTIP 5
Not used 6
Not Used 7
Not used 8