Voice Trunking Gateway
Vmux-110
timeslots of G.723.1 compressed
voice together into bundles with a
common IP address, actual link
bandwidth used can be reduced
to as low as 4 kbps per channel
(a reduction of 16:1).
•
CAS and CCS signaling are
transparently transmitted
end-to-end. Vmux-110 transmits
HDLC-based CCS signaling
protocols such as SS7, ISDN and
QSIG as HDLC over IP. HDLC
frames are removed, and any
signal payload is sent in an IP
packet. For ISDN and QSIG
protocols, this results in significant
bandwidth savings.
•
For deployment optimization,
Vmux-110 with E1 or T1 voice
ports can be ordered to compress
6, 12, 18, 24 (for full T1 trunk) or
30 timeslots (for full E1 trunk).
Each timeslot carries a single
digital voice channel.
•
Vmux-110 is a compact, 1U high,
half 19" wide unit that can be
mounted in standard 19" racks.
PRIORITY MECHANISM
•
Vmux-110 includes an internal
mechanism for identifying and
providing priority for packets
containing voice, over those
containing other LAN traffic. This
ensures that voice packets are not
delayed and a high voice service
quality is maintained.
QoS SUPPORT
•
The IP uplink complies with all
relevant Ethernet LAN standards,
such as IEEE 802.3 and 802.3u. It
provides reliable, high Quality of
Service (QoS), by optional VLAN
tagging and priority labeling
according to IEEE 802.1p&q.
•
The user can configure the Type
of Service (ToS) of the outgoing IP
packets. This allows an en-route
Layer 3 router or switch, which
supports ToS (or Diffserv), to give
higher priority to Vmux-110‘s
IP traffic for delay-sensitive
applications.
•
Assigned, IANA-registered UDP
socket number for TDMoIP
simplifies flow classification
through switches and routers.
MANAGEMENT
•
All Vmux-110 operating
parameters are configured using a
simple, menu-based software. For
upgrades or backup, software
upload and download can be
performed via TFTP.
•
Vmux-110 can be configured and
monitored via a local ASCII
terminal, Telnet, or via RADview,
RAD’s Network Management
system. An RJ-45 Control port is
provided for local terminal
connection for monitoring and
control.
•
For system security, Vmux-110
provides four different levels for
users: Monitor, Technician,
Operator and Administrator. Up
to 20 different usernames with
passwords can be defined.
Vmux-2100
PSTN
E1/T1s
10/100BaseT10/100BaseT
Site B
Digital Voice
PBX
Vmux-110
Vmux-110
E1/T1
Trunk
FXS
Analog
Voice
Digital
Voice
Data
Data
10/100BaseT
10/100BaseT
Site C
Site A
Ethernet LAN
Ethernet LAN
Ethernet LAN
Vmux-2100
PSTN
IP
Network
E1/T1s
10/100BaseT
10/100BaseT
Central Site
10/100BaseT
10/100BaseT
Router
Figure 1. Data and Compressed Digital/Analog Voice over IP Network
APPLICATIONS
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