Trunk Circuit Features - Avaya Nortel Communication Server 1000 Reference

NT8D15 E and M Trunk card
change entries and jumper strap settings. All units on the card can perform the following
features:
• convert transmission signals from analog-to-digital and digital-to-analog
• provide outpulsing on the card: make/break ratios are defined in software and
downloaded at power-up and by software command
• provide 600-ohms balance and termination impedance (2-wire configuration)
• provide 600-ohms termination impedance (4-wire configuration)
• provide pad control for 2-wire and 4-wire facility connections
• enable trunk type and function to be configured on a per-port basis in software
• provide isolation of foreign potentials from transmission and signaling circuit
• provide software control of A-Law and µ-Law modes
• support loopback of pulse code modulation (PCM) signals to DS-30X for diagnostic
purposes

Trunk circuit features

Trunk unit functions
The functions provided by each unit on the E and M Trunk card include 2-wire signaling, 4-wire
signaling, and paging operation as follows:
• 2-wire, E and M Type I signaling (see
page 437) with:
- near-end seizure and outpulsing with M lead
- ground detection with E lead
- voice transmission through tip and ring for transmit and receive
• 4-wire, E and M Type I and II signaling (see
page 437), 2-way dial repeating with:
- echo suppression for Type I signaling
- switchable 7 dB and 16 dB pads for carrier interface
- voice transmission and reception through two separate paths
- Type I signaling through E and M leads
- Type II signaling with near-end seizure by SB/M leads and far-end detection by E/
SG lead
436 Circuit Card Reference
Figure 135: E and M Type I signaling
Figure 136: E and M Type II signaling
Comments? infodev@avaya.com
on
on
July 2011