Vmux-110
Voice Trunking Gateway for Remote Sites
Vmux-110 features two 10/100BaseT
Ethernet ports, one network and one
user. The latter is provided for connecting
a user Ethernet LAN to the unit. Together
with the Vmux-110 integral Ethernet
switch, this allows integrating the user
LAN traffic with the compressed voice,
over a single uplink (IP, serial, or E1/T1) to
the network.
To transfer voice as well as 10/100 Mbps
Ethernet data over an uplink with limited
bandwidth (such as for satellite
applications), the ingress data rate on
both Ethernet ports is limited between
128 kbps and 8 Mbps.
Vmux-110 is a compact, 1U-high,
half 19-inch wide unit. One or two
Vmux-110 units can be mounted in a
standard 19-inch rack.
IMPROVED BANDWIDTH UTILIZATION
Voice Activity Detection (VAD) and silence
suppression allow Vmux units to
dynamically allocate bandwidth for voice
traffic. This results in efficient bandwidth
usage, leaving more bandwidth for data
transport.
By preventing packets from being sent
when no voice activity is detected, the
VAD mechanism conserves bandwidth.
Vmux-110 can transport a higher number
of channels than is possible by using
conventional voice compression methods
alone. By performing TDMoIP multiplexing
and grouping the timeslots of G.723.1
compressed voice into bundles with a
common IP address, the actual link
bandwidth can be reduced to as low as
4 kbps per channel (a reduction of 16:1).
DATA STREAM TRANSFER
Vmux-110 transfers various data streams
that are not processed as voice. The
following data streams are supported:
Up to four independent HDLC data
streams per E1/T1. Each data stream
may occupy one or more timeslots.
Up to two independent SS7 data
streams per E1/T1. Each data stream
may occupy one or more timeslots.
Transparent connection between
n x 64 channels over IP and TDM
networks. This feature is available for
two Vmux-110 units working opposite
each other, as well as for Vmux-2100
working opposite Vmux-110. Up to
8 timeslots per E1/T1 can carry
transparent data.
Figure 1. Data and Compressed Digital/Analog Voice over IP Network
(4 paginas)
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