Nortel Circuit Card Installation Manual page 344

Page 344 of 906
553-3001-211 Standard 3.00
NT5D97 Dual-port DTI2/PRI2 card
Note: Do not change this setup.
Table 124
Trunk interface line build out switch settings
Description
0dB
Receiver impedance
A per-trunk set of four DIP switches (S8/S14 provides selection between 75
or 120 ohm values. Refer to Table 125.
Table 125
Trunk interface impedance switch settings
Description
75 ohm
120 ohm
Ring ground switches for NT5D97AA/AB
A set of four Dip switches (S2) selects which Ring lines are connected to
ground. Refer to Table 126.
Table 126
Ring ground switch settings (Part 1 of 2)
Switch Description
1 Trunk 0 Transit
2 Trunk 0 Receive
August 2005
S5/S11
OFF
S8/S14 switch setting
OFF OFF
OFF OFF
S2 switch settingS
OFF-Ring line is not grounded
ON- Ring line is grounded
OFF-Ring line is not grounded
ON- Ring line is grounded
Switch setting
S6/S12 S7/S13
OFF OFF
ON
OFF
OFF
ON