Nortel Networks Circuit Card - Manual (Page 108)

Page 108 of 906 Option settings
553-3001-211 Standard 3.00 August 2005
A set of three switches provides selection of dB values. Use SW5, SW6, and
SW7 for Trunk 0; use SW11, SW12, and SW13 for Trunk 1 (see Table 17).
A set of four DIP switches provides selection among three values for receiver
impedance. Use SW8 for Trunk 0; use SW14 for Trunk 1 (see Table 18).
Table 17
Trunk interface line build out switch settings
Switch Setting
Description
SW5/SW11 SW6/SW12 SW7/SW13
0 dB off off off
7.5 dB on on off
15 dB on off on
Table 18
Trunk interface impedance switch settings
Description SW8/SW14 Switch Settings
75
Ω
off off on off
100
Ω
on off off on
120
Ω
off off off on