Trunk Interface Switches For Nt5D97Aa/Ab - Avaya Nortel Communication Server 1000 Reference

Trunk interface switches for NT5D97AA/AB

Impedance level and unit mode
The S9/S15 switch selects the impedance level and loop operation mode on DEI2 OR PRI2.
Refer to Table 116: Impedance level and loop mode switch settings
Table 116: Impedance level and loop mode switch settings
Switch
1
2
3
4
Transmission mode
A per-trunk switch (S4/S10) provides selection of the digital trunk interface type. Refer to
117: Impedance level and loop mode switch settings
Table 117: Impedance level and loop mode switch settings
E1
Not used
Line build out
A per-trunk set of three switches (S5/S11, S6/S12 and S7/S13) provides the dB value for the
line build out. Refer to
Note:
Do not change this setup.
Circuit Card Reference
Description
Impedance level
Spare
Spare
Unit mode
Description
Table 118: Trunk interface line build out switch settings
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
on page 273.
S4/S10 switch settings
OFF
Functional description
on page 273.
Table
on page 274.
July 2011 273