Nortel Circuit Card Installation Manual page 861

Table 269
Connector J1 and J2 pin assignments – high-speed interface (Part 2 of 2)
Pin number
Timing
12
14
15
17
23
24
Note: Pins not used are 9, 10, 11, 18, 19, 21, 22, 25.
QPC513 Enhanced Serial Data Interface card
Signal functions
Transmitter signal element tim-
ing (DTE) – lead B
Transmitter signal element tim-
ing (DCE) – lead B
Transmitter signal element tim-
ing (DCE) – lead A
Transmitter signal element tim-
ing (DTE) – lead A
Receiver signal element timing
(DCE) – lead A
Receiver signal element timing
(DCE) – lead B
Signal source
From
To DCE DCE
—
—
—
—
3
3
Circuit Card Description and Installation
Page 861 of 906
EIA
circuit
(lead)
3 DD (B)
DB (B)
3
3 DB (A)
3 DD (A)
— DA (A)
— DA (B)