Option Switch Settings
TN760E Tie Trunk Circuit Pack Option Settings
SI Installation and Upgrades 757
June 2004
TN760E Tie Trunk Circuit Pack Option Settings
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The TN760E Tie Trunk circuit pack interfaces between the tie trunks and the Time Division Multiplex
(TDM) bus. Two tip and ring pairs form a 4-wire analog transmission line. An E and M pair is used for
signaling and are DC signaling leads used for call setup. The E lead receives signals from the tie trunk
and the M lead transmits signals to the tie trunk.
To choose the preferred signaling format (Table 38, Signaling Formats for TN760E,
on page 757 and
Table 39, Signaling Type Summary,
on page 757), set the switches on the TN760E and administer the
port per Figure 298, TN760E Tie Trunk Circuit Pack (Component Side),
on page 758 and Table 40,
TN760E Option Switch Settings and Administration, on page 758.
CAUTION:
To prevent damage from static electricity, wear an EMC wrist strap when handling circuit
packs or other components.
Table 38: Signaling Formats for TN760E
Mode Type
E & M Type I Standard (unprotected)
E & M Type I Compatible (unprotected)
Protected Type I Compatible, Type I Standard
Simplex Type V
E & M Type V
E & M Type V Revised
Table 39: Signaling Type Summary
Signaling Transmit (M-Lead) Receive (E-Lead)
Type On-Hook Off-Hook On-Hook Off-Hook
Type I Standard grd bat open
1
/bat
1 An open circuit is preferred instead of battery voltage.
grd
Type I Compatible open
1
/bat grd grd open
1
/bat
Type V open
1
/bat grd open grd
Type V Reversed grd open grd open
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