Avaya DEFINITY Server CSI, Руководство по обслуживанию, Страница: 124 / 1930

Maintenance for CSI systems
555-233-119 124
Issue 5 October 2002
TN760D Tie Trunk Option Settings
The TN760D Tie Trunk circuit pack interfaces between 4 tie trunks and the TDM
bus. Two tip and ring pairs screen a 4-wire analog transmission line. An E and M
pair 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 11 and Table 12 ), set the
switches on the TN760D and administer the port using Figure 16 on page 125 and
Table 13 on page 125 .
Table 11. Signaling Formats for TN760D
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 12. Signaling Type Summary
Transmit (M-Lead) Receive (E-Lead)
Signaling Type On-Hook Off-Hook On-Hook Off-Hook
Type I Standard ground battery open
1
/battery
1. An open circuit is preferred instead of battery voltage.
ground
Type I Compatible open
1
/battery ground ground open
1
/battery
Type V open
1
/battery ground open ground
Type V Reversed ground open ground open