RAD Data comm Vmux-2100 Voice Trunking Gateway operation manual Features

Vmux-2100Installation and Operation Manual Chapter 1 Introduction

Features

E1 Main Link

Balanced redundant E1 main links ports use HDB3 coding and comply with G.703, G.704, G.706, G.732 and G.823 standards. The E1 framers support pass-through, G.732S and G.732N framing with or without CRC-4. Integral LTU/DSU can be enabled for line protection and long haul options. Unbalanced E1 connection is achieved via an external interface adapter.

T1 Main Link

Balanced redundant T1 main link ports use AMI coding, B8ZS zero suppression, and comply with ANSI T1.403, AT&T TR-62411 and ITU-T G.703 standards. The T1 framers support pass-through, SF, ESF. Integral DSU/CSU can be enabled for line protection and long haul options.

Ethernet Main Link

Vmux-2100 has a half/full duplex, 10/100BaseT Ethernet port with autonegotiation support. If autonegotiation is disabled, Vmux-2100 can be configured to any of the following:

•10BaseT – half or full duplex

•100BaseT – half or full duplex.

The main link Ethernet port supports direct and indirect connection to the IP networks.

Voice Modules

Vmux-2100 voice modules control E1/T1 frames, use G.723.1 (6.4 or 5.3 kbps), G.729 A (8 kbps) and G.711 compression algorithms, and handle CAS/CCS signaling transparently. Every group of two E1s or T1s is assigned a separate IP address.

Voice Activity Detection mechanism allows optimizing bandwidth utilization, as Vmux-2100 generates traffic only when voice activity is detected. Vmux-2100 uses the G.723.1 A and G.729 B techniques for silence suppression and the G.168 standard for echo cancellation (up to 16 ms per channel). Vmux-2100 detects, generates and relays DTMF/MFR2/MFC signals. In addition, Vmux-2100 supports Group III fax relay (4.8, 9.6, 14.4 kbps) and transmits voice-band modem data.

Voice modules are hot-swappable.

TDMoIP Multiplexing

Vmux-2100 encapsulates the payload bytes in a UDP frame that is transferred over IP and over Ethernet.

The number of TDM bytes in a multiplexed frame and packetizing interval are user-configurable.

A destination IP address can be configured for each bundle (see Bundling, below).

Overview 1-3