Nortel Communication Server 1000S Installation And Configuration Manual page 162

Page 162 of 394
Trunk interface switches for NT5D97AA/AB
553-3001-201 Standard 2.00
NT5D97 Dual-port DTI2/PRI2 installation and removal
The following parameters are set by DIP switches. The boldface font shows
the factory set-up.
Impedance level and unit mode
The S9/S15 switch selects the impedance level and loop operation mode on
DEI2 OR PRI2. Refer to Table 38 on
Table 38
Impedance level and loop mode switch settings
Switch Description
1 Impedance level
2 Spare
3 Spare
4 Unit mode
Transmission mode
A per-trunk switch (S4/S10) provides a selection of the digital trunk interface
type. Refer to Table 39 on
Table 39
Impedance level and loop mode switch settings
Description S4/S10 switch settings
E1 OFF
Not used
September 2004
page 162.
S9/S15 Switch Setting
OFF - 120 ohm
ON - 75 ohm
X
X
OFF - Loop operates in the DTI2 mode
ON - Loop operates in the PRI2 mode
page 162.