IP Telephony News Wrap-up for Apr, 19 2002

1. Jasomi Introduces SIP to SIP Gateways
Jasomi Networks has introduced PeerPoint, a SIP to SIP gateway that enables carriers to directly route call signaling and media flows into each other’s networks while maintaining control of access to their own internal networks and protecting call route information from release to competitors. PeerPoint employs a back-to-back user agent technology base tied to an integrated media proxy. Each call is split into two half calls, with the gateway controlling the signaling and media streams of both halves. One half call is designated as external to the carrier and the other is internal. The technology also appears as a call termination point.

The company has also introduced PeerPoint Enterprise Edition, a server deployed in an organization’s DMZ that translates VoIP call streams between the internal private IP address space and the external global address space, enabling calls to pass across the NAT boundary.

In a separate announcement, Jasomi has said that it has addressed the FCC’s CALEA requirement with the introduction of Intercept Box, an edge technology that allows law enforcement to listen to VoIP calls. The technology works by splitting each VoIP call into two parts: caller to intercept and intercept to callee. By selectively passing call data between the two half calls, the intercept box creates the illusion of a complete call between the two endpoints, adding a few microseconds of latency to each call packet. As with Jasomi’s gateways, the Intercept Box uses back to back user agent with an integrated media proxy.

Jasomi Networks

3. AT&T Introduces Video Gateway Service
AT&T has introduced Video Gateway Service, a managed enterprise videoconferencing service that provides global connectivity, security, and network management. The service supports ISDN to IP point to point calls, IP to IP or IP to ISDN multipoint calls, and IP to IP point to point calls within a company.

Service features include 10-digit dialing, a portable 700 number for initiating videoconferences globally, initiation of reserved or on-demand calls via a web site, Multipoint Call Unit for security, and directory features such as a favorites list and a recently called list. There are no port fees for both point to point and multipoint IP and ISDN calls.

AT&T’s gateway node, resident in the company’s network, provides the protocol conversion between H.320 ISDN and H.323, in addition to call setup and routing for proper call billing.

The gateway service enables video endpoints to connect between circuit switched ISDN, the Internet and ATM and AT&T’s Managed Internet Services. The service is compatible with multiple brands of ISDN and IP enabled video equipment and PC based software and cameras.

AT&T Video Gateway Service

5. Radvision Introduces SIP Testing
Radvision has added testing and validation of SIP to its ProLab Test Management Suite. The technology simulates networks and call generation for product interoperability and test performance. Tests include performance, load, stress, interoperability, and media and protocol compliance. The script-driven SIP Test Manager tests SIP user agent servers and clients, SIP registrars, proxy servers and redirect servers, SIP phones, mobile phones, videoconferencing endpoints and network equipment, softswitches, and conferencing bridges. The testing tool is delivered with hundreds of pre-written scripts, canned messages, and media files.

In other company news, Radvision has said Texas Instruments will bundle its SIP technology with TI’s integrated silicon and software for premises gateways and IP phones. TI currently offers Radvision’s H.323 and MEGACO/H.248 protocols with its IP phone, residential/SOHO gateway and enterprise gateway solutions.


7. iCable Using Intersil’s Voice Interface for Modems
iCable System has integrated Intersil’s ISL6401 line and ring power IC and ISL5586 ringing SLICs within its ICS-MTA121N MTA and ICS-112C cable modem. The line and ring power IC is an adjustable frequency, low power PWM current mode controller designed for a wide range of DC-DC conversion applications including boost, flyback and isolated output configuration. The SLIC is designed for home gateway applications. It provides on-board ringing signal generation up to 95 V peak supporting both sinusoidal and trapezoidal waveforms with DC offset. The two technologies are combined to create a voice/fax port that replicates the PSTN.

iCable’s cable modem includes a CATV RF tuner with CMOS silicon, a processor with MIPS-32 CPU and DSP, a RJ-45 Ethernet interface, a USB 1.1 type B interface and two RJ-11 voice ports. The stand alone MTA adds VoIP capability to any cable modem, ADSL modem, wireless local loop, router or hub.

iCable Systems


9. TEC Approves VocalTec’s Gear for Use in India
The Telecommunication Engineering Centre has approved VocalTec’s gear for deployment in India. The testing was mainly conducted on the company’s 120 and 2000 model gateways.


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