Lucent Technologies 555-230-128 TN760D Tie Trunk Option Settings, Type I Standard unprotected

DEFINITY Enterprise Communications Server Release 6	Issue 3
Installation and Test for Compact Modular Cabinets 555-230-128	May 1998

2Installation Completion and Cable Pinouts

TN760D Tie Trunk Option Settings Page 2-5

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 form 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 2-2 and Table 2-3), set the switches on the TN760D and administer the port using Figure 2-2 and Table 2-4.

Table 2-2. 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 2-3. Signaling Type Summary

Signaling Type	Transmit (M-Lead)		Receive (E-Lead)
	On-Hook	Off-Hook	On-Hook	Off-Hook
Type I Standard	ground	battery	open1/battery	ground
Type I Compatible	open1/battery	ground	ground	open1/battery
Type V	open1/battery	ground	open	ground
Type V Reversed	ground	open	ground	open

1. An open circuit is preferred instead of battery voltage.