To add to your collection of resources, we've compiled a few of the most useful Telecom and ISDN links. If you're a Telos Zephyr or Zephyr Xstream owner, some of these sites can also help you locate others with whom you can connect. If you have a site you feel is an indispensable Telecom reference tool, please send e-mail telos-info@telos-systems.com and we will consider adding them.

General Telecom Information:

• Goodman's Bookmarks is a clearinghouse for fresh, factual information about what's going on in the worldwide Telecom industry. Also contains links to a variety of helpful Telco and ISDN sites.

• David Massey's Telephone Tribute is an excellent historical reference on the history of wired communication, with special attention to the rise and fall of the Bell System. 

Third-Party Software Vendors:

• Software Authority has developed a remote control program for the Zephyr and Zephyr Xstream called Zephyr Remote. A demonstration version can be downloaded from http://www.softwareauthority.com .

• Condron Broadcast Engineering has call-screening software that allows Internet or LAN control of the Telos TWOx12, Direct Interface and ONE-x-Six Talkshow Systems. Visit http://www.cbesoftware.cc/ for a downloadable demo.

• Broadcast Electronics' AudioVault CallBOSS provides call-screening capabilities for Telos 1A2, ONE-x-Six and Direct Interface talkshow systems. 

• Radio Computing Services' TalkBack is a call-screening solution for Telos (and others') analog-phone-line equipment.

• Salem Radio Labs, the broadcast systems R&D division of Salem Communications, has developed Call Commander, a public-license call screening program for Telos TWOx12, ONE-x-Six, Direct Interface and 1A2 Talkshow Systems that runs on the GNU/Linux operating system.  

ISDN Sites:

• The National ISDN Council has an excellent primer for ISDN novices and pros alike.

• ISDN Zone is an excellent compilation of US and International ISDN information links, with emphasis on European information. 

• Dan Kegel's ISDN Page is the best collection of ISDN-related pointers to World Wide Web sites and FTP documents on other servers. There is something there for novices and experts alike.

• Adtran manufactures ISDN terminal adapters and CSU/DSUs for dedicated digital links. The ISDN Info Desk found on their site has lots of useful information.

• Those truly dedicated to ISDN in the US will want to check out the site of the National ISDN User's Forum.

Codec User Sites:

• Audiobahn lists broadcasters and sound studios with dialup digital audio who have agreed to be listed so you can call them when you need a facility for news feeds, remotes, audio transfers, or other long-distance audio services. Jay Rose's Digital Playroom (a commercial/promo facility in Boston) maintains this list;when you reach his page, scroll about halfway down to find it . At present, the list covers US sites only.

• Al Rieland at Wisconsin Public Radio maintains the Switched Digital Audio Directory for Public Radio. Lots of listings for the US and Canada. We think this is the oldest continuously published list of its kind.

• Simon Fraser University's School of Computing Science in Burnaby, British Columbia has an excellent Overview of Audio Coding in their graduate course notes. If you're new to audio coding methods, this quick overview will get you up to speed.

1A2 Parts Sources:

We often receive inquiries from clients seeking replacement phonesets, KSUs and parts for 1A2 Key Systems. The following is a list of resources you may find helpful (no endorsement of any vendor is expressed or implied):

• Ex-Bar makes a high-security line card for 1A2 systems that's an exact replacement for the unavailable San-Bar security card.

• Telephone Equipment & Service in Dallas, Texas has parts for 1A2 and dozens of other phone switch systems.

• Western Telephone & Communications in Toronto, Ontario offers parts and technical support for analog phone systems.

• Tel-Part, Inc. in Largo, Florida specialized in 1A2 and Tadiran parts.