Voice Over IP Router

VIPER

The Case Communications Viper uniquely integrates voice, data and fax, with phone-to-PABX and PABX-to-PABX connectivity over ISDN, leased lines and frame relay. This voice-integrated router allows multi-channel voice and LAN connectivity over a single leased circuit or ISDN Basic Rate 'B' channel for office to office and teleworker/call centre environments.

Typical application

See examples of the product in use:

• Selex UK
• John Smedley
• Network Rail
• Lundwood Medical

Application

Office-to-office

Many primary rate ISDN circuits today are used for PBX networking using a multiplexer to allow data from a router to share some of the bandwidth. This is an inflexible solution requiring multiple units with expensive and inefficient permanently allocated bandwidth. A solution with ten voice channels plus 128 Kbps for data would require a 768k fractional Pri link.

An equivalent Case Communications Viper solution would require only a 256 Kbps link, resulting in a significant saving in recurring line rental costs. It would also allow 150Kbps to 256Kbps for data depending on the number of active channels.

Mixed networks

Viper units networked together act as a distributed exchange allowing multi-channel Pri-Connections at the central site with a mix of Bri, AC15 / DC5 or even standard POTs phones at remote sites. Viper networking converts the different interfaces and protocols.

Viper technology

Viper incorporates ITU – G.729A voice compression at 8 Kbps, which with silence compression and confort noise generation allows a reduction to less than 1 Kbps during pauses in the speech.

The standards based header compression scheme ensures that the voice packets occupy only 9600 bps of the WAN bandwidth. Automatic fragmentation of datapackets where necessary and prioritisation of the voice ensures the quality of service (QOS) aspects needed for voice. Viper incorporates an IP/IPX router with multiple interfaces including ISDN Bri and serial synchronous WAN connections for Frame Relay and leased access, plus a serial port for HDLC pass through. The ISDN Bri can be used for 128 Kbps dial-up connectivity or for top-up/ backup on leased circuits. The PABX connection is via a multichannel Bri / Pri Interface.

Benefits

• Quality of service (QOS) – The Viper ensures voice QOS by fragmenting IP packets and prioritising the voice. This is difficult to guarantee in other voice over IP products which do not have an integrated router.
• Cost-effectiveness – Viper single-box integration reduces capital costs by removing the need for separate router and voice units, and provides ongoing savings in line rentals through converged networking as well as reduced installation, maintenance, support and administrations.
• Improved quality – The digital voice connections on the Viper eliminate the losses and interference possible with analogue connections. Standardised digital Bri and Pri interfaces and their associated protocols ensure maximum compatibility and reliability. A single multi-channel Pri ISDN connection eliminates the multiple interfaces and cables required with analogue interfaces all contributing to the quality of the Viper solution.

TECHNICAL SPECIFICATIONS

WAN services

• PPP & ML-PPP
• Frame relay
• HDLC pass through
• WAN optimisation
• STAC compressions
• ISDN back-up with bandwidth on demand
• Prioritisation plus fragmentation of data packets
• Voice and header compressions
• RIPv1, V2

Frame relay

• FRF 1.1
• FRF 3.1
• ITU Q9.922

Inputs

Ethernet Interface

• 10 Base T

Protocols and services

• IP Routing
• IPX Routing

PABX interface

• 4 port – Dual Bri 4
• 8-10 port Pri
• Q931\QSig\DPNSS

Voice codecs

• ITU G.711
• ITU G726
• ITU G729A
• VBR with silence suppression

Fax support

• Group 3
• 2400-14400 BPS

Outputs

WAN interfaces

• 2 channel X.21 / V.35
• 2 Channel RS 232 / V24

ISDN WAN interface

• Single Bri
• 2 x 64Kbps Bri Channels

Management

• SNMP
• Telnet
• Local control port

Voltage range

• 210 – 240 vac 50/60 Hz @ 15 VA

Safety

• TUV EN60950
• CSA 950
• NTRL/UL 1950 EMI/RFI
• EN5022 FCC Part 68, FCC part 15

Approvals

• Net 1.2.3
• CE Mark

View data sheet for Viper Router