August 2005 - The Voice over Internet Protocol (VoIP) market has experienced exponential growth over the past five years, moving from a technology that many doubted would be applicable to mainstream applications, to forming a key component of what most now believe to be the future of telecommunications - packet switched networking.

VoIP is expanding over consumer broadband, WiFi and WiMax clouds, and global enterprise VLANs. As this happens, voice and multimodal customer transactions are increasingly being conducted through end-to-end packet networks. In the UK, BT plc has announced that it will be investing £10bn into a network overhaul that will convert it to packet switching running VoIP.

Redwood has provided VoIP solutions since the late 1990s. To cater for the expanding market the company recently released its new high density IPM-360-03-99-01 VoIP module.

The module, which plugs into Redwood’’’’s DNX softswitches (DNX-1200, DNX-1100 or DNX-900), is capable of converting circuit switched TDM (Time Division Multiplex) voice channels into packets for transmission on the IP network. In addition, the module can encode the TDM stream to reduce the payload size, before delivering it to the IP network. Conversely, IP packets containing various payload types (G.711, G.723, G.729, etc) can be converted to TDM circuit switched data for transmission to the communications bus. The communication bus can then be used to deliver the TDM channels to various resources, including voice processing for IVR applications, and to the PSTN via digital and analogue interface modules.


Each module has a capacity of up to 2,520 channels.

VoIP Call Control Protocols

Redwood is committed to supporting open standards within its product range and is actively developing strategies that allow interoperability with all packet based protocols, including H.323, SIP and MEGACO/H.248.

Target Applications

The VoIP module enables Redwood's feature-rich Value Added Services solutions to be opened up to the packet based network. These include real-time voice and data billing, Unified Communications, virtual telephony, ASR, IVR, conferencing, central and distributed contact centres and mass calling.

Significant Features

  • Voice, fax and data support
  • VoIP packet streaming (RTP/RTCP)
  • HBR and CBR codecs supported simultaneously
  • On-board codec conversion
  • Two GigE interfaces on rear I/O module
  • Hot swap compliance
  • Silence suppression
  • Echo cancellation
  • Tone detection and generation.

For further information please contact:-
Rachel Love
T. +[44] (0) 1 344 304 344
F. +[44] (0) 1 344 304 345

August 1, 2005
Category: News