Voice Over Ip Features - Nortel Remote Office 9150 Installation And Administration Manual

Remote Office 9150 description

Voice over IP features

Introduction
You can configure the Remote Office 9150 unit to use the following Voice over
IP features:
Convert analog voice into digital data for transmission as voice packets
over the network for calls to or from the fax machine or other analog device
that is connected to the analog port on Telco 1.
Automatically switch from the IP network to the circuit-switched network
when the voice QoS falls below a predetermined threshold, and back to the
IP network when the QoS returns to normal.
Packetized voice
DSPs located in the Remote Office 9150 unit convert voice into digital data
packets and, if compression is used, compresses them. The data is constructed as
UDP/IP voice packets for transmission over the IP network.
When voice packets are compressed, they consume less bandwidth, leaving
more bandwidth for data or other voice or fax communications. The following
algorithms are supported:
G.711: Packets are transmitted at 64 Kbps (that is, they are not
compressed).
G.726: Packets are compressed and transmitted at 32 Kbps.
G.729A: Packets are compressed and transmitted at 8 Kbps.
G.729A is the default algorithm on both the MIG RLC and the Remote Office
9150 unit.
In addition to voice compression, the Remote Office 9150 unit supports the
following additional packetized voice features:
A voice jitter attenuation buffer removes the variable delays from the voice
packets sent across the IP network, thus avoiding awkward-sounding
speech.
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Standard 1.0
Remote Office 9150