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RAD Data Communications 2011 Catalog

Vmux-2120

Voice Trunking Gateway

Voice compression over TDM and IP

transport

The Vmux-2120 employs G.723.1, G.729 Annex

A, AMR and G.711 compression algorithms,

together with RAD’s unique TDMoIP

multiplexing, to transmit up to 496/384 voice

channels, including transparent CAS and CCS,

over a single E1, T1 or IP link.

Compressed voice can be transmitted over both

TDM and IP networks by a single Vmux-2120

device. This unique capability enables the

Vmux-2120 to easily switch between networks

when necessary, without requiring additional

equipment. Voice activity detection (VAD) and

silence suppression allow Vmux-2120 units to

dynamically allocate bandwidth for voice traffic

as needed, resulting in highly efficient

bandwidth utilization over fewer links and

freeing up line capacity for data transport.

In addition, the Vmux-2120 supports

transparent delivery of voice band data,

enabling the transport of multiple HDLC and SS7

channels, as well as n x 64 kbps streams. All

CCS protocols, such as SS7, ISDN and QSIG are

supported. The device’s full signaling

transparency ensures seamless integration that

does not involve retraining costs or loss of

functionality.

Price performance benefits over VoIP

By combining voice/fax capabilities with

Ethernet data traffic over a single delivery

network, operators can save significantly on the

costs of running their networks. The

Vmux-2120’s TDMoIP capabilities enable higher

bandwidth savings (16:1) than any standard

VoIP solution, while providing an effective

migration path to IP. With super-tandem

(transcoder-free operation) support, it ensures

a single compression cycle end-to-end for calls

connected via multiple Vmux units, thereby

avoiding voice degradation and delay. In

addition, the Vmux-2120 offers improved

resiliency to packet loss and supports

bandwidth control mechanisms for congestion

avoidance.

Space-saving unit with fully redundant

system

The compact, 1U-high Vmux-2120 can be

installed in 19-inch racks and features the

smallest footprint compared to any TDM voice

compression or VoIP product of equivalent

capacity. In addition to TDM and Ethernet port

redundancy, as well as redundant hot-

swappable power supplies, the system supports

hot-standby, hot-swappable card redundancy

and allows hitless software upgrades.

Pay as you grow

Vmux-2120 can be ordered with only some of

the voice ports activated. Software licenses may

be added at any time for enabling additional

ports, thus allowing easy system expansion.

•

Compresses up to 16 E1/T1 voice lines

over redundant channelized E1/T1 or

Fast Ethernet links

•

Up to 16:1 voice compression using a

wide range of standard codecs

•

Fully redundant platform

•

3G media gateway functionality with

MEGACO, VoIP and SIGTRAN support

•

Silence suppression, 128 ms echo

cancellation and TDMoIP multiplexing to

maximize bandwidth savings

•

Transparent to all signaling protocols

and telephony features

•

QoS support: Q.50 and bandwidth

management

•

Local and remote management via ASCII

terminal, Telnet or RADview-SC/Vmux

•

Compact, scalable and easy to deploy

V O I C E T R U N K I N G G A T E W A Y S

For latest updates visit www.rad.com

Central Site

Site A

Site B

Ethernet

LAN

E1/T1s

IP/TDM

Network

Gmux-2000

PSTN

Vmux-2120

10/100BaseT

Analog

voice

data

FXS

Up to

30 FXS

PSTN

Vmux-210

Site C

E1/T1s

PSTN

Vmux-110

10/100BaseT

E1/T1 E1/T1

E1/T1

RAD’s Vmux-2120 carrier-grade voice trunking and

3G media gateway provides compressed voice

transmission over both TDM and IP networks.

Employing powerful voice compression algorithms

as well as TDMoIP multiplexing, the Vmux-2120

compresses up to 16 E1/T1 circuits over

redundant E1/T1 or packet-based network access

links, with backup between the TDM and IP

connections. The device’s dual TDM and Ethernet

uplinks enable load sharing and simultaneous

connections to different locations.

In addition, the fully redundant Vmux-2120

supplies 3G media gateway services, thus enabling

operators to avoid 2G MSC forklifts when

transitioning to 3G services. The platform is

interoperable with NG-MSCs and softswitches.

The Vmux-2120 is ideal for cellular operators

looking to replace expensive leased lines between

MSCs, or between MSCs and the PSTN, with cost-

effective packet transport. In addition, it allows

international telecom providers and call centers to

reduce the number of international lines they

lease, and enables disaster recovery solution

providers to save on expensive satellite

bandwidth.

Voice trunking over IP/TDM in a mesh topology

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