Rhino Equipment Has Released Their New 4 Port FXO Card With Echo Cancellation
rhino r4fxo-ec

The Rhino R4FXO-EC is a next generation analog PCI card for use with Asterisk and other open source telephony platforms. The R4FXO-EC features an on-board control element and on-board Echo Cancellation Circuit. The on-board control element prevents PCI bus “bit banging” which allows for lower CPU power, while the on-board Echo Cancellation circuit provides echo protection to ensure crisp clean calls.

Rhino R4FXO-EC Features & Functionality

  • Asterisk soft PBX tested and ready
  • Zaptel-compliant open source Linux module source code
  • Proven Silicon Labs FXO DAA component – Si3050
  • Silicon Labs international line interface device – Si3019
  • Custom Rhino PCI interface chip means no excess CPU overhead
  • Four RJ11 jacks at card bracket
  • Field

TORONTO – May 10, 2006 – Sangoma Technologies Corporation (TSXV: STC) (www.sangoma.com), a leading provider of connectivity hardware and software products for VoIP, TDM voice, WANs and Internet infrastructure, has introduced its new A108 Series PCI cards to support high density voice and data applications. At 8 T1/E1 ports, the A108 has the highest T1/E1 density available on a PCI card.

As with other Sangoma PCI cards, the A108 is available in an A108d version especially built for the soft telephony industry. The A108d supports voice enhancement capabilities including G.168-2002 echo cancellation with 1024 tap/128ms tail per channel on all channel densities, DMF encoding/decoding and tone recognition, voice quality enhancement and adaptive noise reduction.

“We brought this high density product to market at the request …

RedFone Communications has released a new, dual T1 version of their popular foneBridge solid-state T1 interface for use with Asterisk Open Source PBX.

foneBRIDGE is a T1 or E1/PRI-to-Ethernet Bridge. It is an integrated black-box “appliance” designed to streamline installation and enable redundant design of Asterisk based VoIP systems. Designing, building, and installing an Asterisk system has never been this easy!

foneBRIDGE eliminates the need to install proprietary TDM (PRI/T1) hardware cards in approved/compatible server configurations. Instead, foneBRIDGE terminates T1/E1 and/or PRI lines on the trunk side and provides direct Ethernet communication to a network of Asterisk servers using native Asterisk TDMoE formats and utilities.

foneBRIDGE provides an economical means of buliding and maintaining a redundant Asterisk solution. Instead of purchasing a TDM board for …

(1)Sangoma has recently announced their A200/REMORA FXO/FXS Analog Telephony support System. It is now available at VoIPSupply.com

The A200 and REMORA system together comprise the FXO/FXS version of Sangoma’s range of Advanced, Flexible Telecommunications (AFT) hardware designed for optimum support of analog voice traffic.

The A200 and REMORA cards support up to a total of 24 FXO and/or FXS connections. A single PCI slot host connection for all ports ensures common synchronous clocking for all channels. The base AFT architecture is shared with Sangoma’s A101, A200 and A104 cards ensuring proven 3.3v/5v, high performance PCI compatibility.

Like all the Sangoma AFT Series, the A200 and REMORA system is field upgradeable to take advantage of the hardware and software improvements as they become available. Also, …

In recent months, both Digium and Sangoma have released T1/E1 Interface cards for use with Asterisk Open Source PBX that provide hardware Echo Cancellation.

Echo can negatively impact QOS (Quality of Service) on a VOIP call and lead to an unsatisfactory user experience. There are two sources of echo on voice communication networks. The first, and most common cause of echo is impedance mismatches anywhere in the circuit-switched phone network. When telco cabling is spliced or terminated in connectors, or in the conversion of 4-wire phone circuits to 2 wires, a discontinuity occurs that causes an impedance mismatch on the phone circuit. The greater the extent of impedance mismatch, the more leakage of transmit audio on the receive side of the line when it terminates …