Nortel Enterprise 1000 Reference Manual page 129

Table 28
Pad switching algorithm
Port B
IPE line
Universal trunk
(TRC)
IPE tie (VNL)
PE line
PE CO/FX/WATS
(TRC)
PE tie
Note: Transmit and receive designations are from and to the Succession CSE 1000. Transmit is from the
Succession CSE 1000 to the external facility (digital-to-analog direction in the E&M trunk card). Receive is
to the Succession CSE 1000 from the external facility (analog-to-digital direction in the E&M trunk card).
Succession Communication Server for Enterprise 1000 Circuit Card Reference Guide
See Table 28 for the pad switching control for the various through
connections and the actual port-to-port loss introduced for connections
between the E&M trunk card and any other IPE port designated as Port B.
Figure 45 on page 130 shows the pad switching orientation.
Port B pads
Transmit Receive
D to A A to D
N/A N/A
Out Out
In Out
N/A N/A
Out Out
Out Out
NT8D15 E&M Trunk Card
E&M Trunk Pads
Transmit Receive
D to A A to D
Out In
In In
In Out
Out In
In In
In In
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Port-to-port loss (dB)
Port B to E&M to
E&M Port B
2.5 3.5
0 0
0 0
3.0 4.0
0 0
0 0