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
