DC offset made by a telephone exchange on telephone line

NewsGroups | Search | Tools

User Password

Lost Password?

comp.dcom.telecom.tech

get this group's latest topics as an RSS feed

add this group's latest topics to your My MSN content

add this group's latest topics to your My Yahoo content

add this group's latest topics to your Google content

Yahoo!

Google

Windows Live

del.icio.us digg

digg

Netscape

Subject	Author	Date
DC offset made by a telephone exchange on telephone line	Peter Addor	06-02-2006

Posted by Peter Addor on June 2, 2006, 7:54 am

If you were Registered and logged in, you could reply and use other advanced thread options

We have a PSTN telephone exchange (like Siemen's EWSD, Ascom's AXE or
Alcatel's S12) and observed that it shows some strange DC offsets if
the state of a connection is "waiting" or "undefined".

I wonder if this is compatible to the standards but don't know which
standard is concerned. There is something in G.711 but not a definitive
statement like "after dialing the switch has to send a DC offset of H00
for xy ms" or something like this.

Does anybody knows some standard concerned issues?

Thanks alot!

Regards,
Peter

Similar Threads	Posted
telephone line ground	May 13, 2007, 10:51 pm
attenuate telephone line signal	July 26, 2006, 5:44 pm
Wireless headset for my land line telephone	December 27, 2007, 7:41 pm
Supply Telephone Voice Modular Adapters,Telephone Modular Couplers,Modular Duplex Jack,Triplex Adapters,Telephone extension Cord	November 12, 2005, 1:27 am
Peculiar recorded message calls to your land line telephone.	September 21, 2006, 4:53 pm
What experiences have you had?... with the telephone services and with telephone equipment from http://jitterbug.com	February 27, 2007, 5:26 pm
How to block the display of your telephone number when you dial an 800 toll free telephone number.	October 24, 2006, 1:50 pm
What community, neighborhood is area code 857 exchange 654 ?...	September 5, 2007, 2:29 pm
Tailor made for VOIP?	August 9, 2006, 9:27 pm
VoiceXML Script error in Envox console when call is made	April 24, 2007, 5:46 am

other useful resources:
The Federal Communications Commission (FCC)
Telecommunications Industry Association
Electronic and Software Security Products and Services
International Telecommunication Union

Custom CGI Perl and PHP programming by 1-Script.com