View all newsletters
Receive our newsletter - data, insights and analysis delivered to you
  1. Technology
June 24, 1997updated 05 Sep 2016 12:28pm


By CBR Staff Writer

Pacific Bell Inc, Southwestern Bell Corp, BellSouth Corp, and The Vendors’ ISDN Association Inc, have announced ISDN services that will enable the use of the ISDN D-Channel, taking advantage of the structure of ISDN to use electronic-mail and other light traffic such as push technology services to be transferred without using either of the two 64Kbps main channels. Currently in beta test, the Always On/Dynamic ISDN will enable users to use the signaling channel the D-channel to deliver data packets, thereby leaving the main channels undisturbed. Over the ‘D’ channel of the ISDN line, the user establishes a 16Kbps-packet connection to a remote Local Area Network or an Internet Service Provider. A user creates this bi-directional connection when he logs on to his work-at-home computer and electronic mail package. Once the connection is established, the user is on-line and can exchange packets with the remote network as required. When there is more information to transfer than can be handled by the packet connection, a circuit-switched connection (telephone call) is placed using one or both of the ISDN ‘B’ channels. This connection can be made automatically and without user intervention, and permits data to move at speeds up to 128 Kbps. Once the data transfer is complete, the circuit-switched connection is dropped and the user remains on-line via the D- Channel. So far there is no date set for making the technology available neither is there any word on pricing. The technology has the backing of Pacific Bell, Southwestern Bell and BellSouth as well as the members of the Vendors’ Internet Association, which includes 3Com Corp, Bay Networks Inc, Cisco Systems Inc and others. Products to support the service are expected from association members in the fourth quarter. Pacific Bell also says it will start offering before the end of the year.

Content from our partners
Rethinking cloud: challenging assumptions, learning lessons
DTX Manchester welcomes leading tech talent from across the region and beyond
The hidden complexities of deploying AI in your business

Websites in our network
Select and enter your corporate email address Tech Monitor's research, insight and analysis examines the frontiers of digital transformation to help tech leaders navigate the future. Our Changelog newsletter delivers our best work to your inbox every week.
  • CIO
  • CTO
  • CISO
  • CSO
  • CFO
  • CDO
  • CEO
  • Architect Founder
  • MD
  • Director
  • Manager
  • Other
Visit our privacy policy for more information about our services, how Progressive Media Investments may use, process and share your personal data, including information on your rights in respect of your personal data and how you can unsubscribe from future marketing communications. Our services are intended for corporate subscribers and you warrant that the email address submitted is your corporate email address.