own@castle.ed.ac.uk (O Morgan) (01/24/91)
I have a question about ISDN, sparked of by the recent anouncements of
BT providing ISDN links in the UK (albeit a low performance system)
and Gandalf having some ISDN equipment approved.
Will you need any special lines for ISDN transmission, or will this
system work on any phone line? If the later applies this is pretty
amazing when considering current modem speeds. (64k/sec is promised?)
What is it about ISDN that allows such greater performances?
Olly Morgan @ Scottish Agricultural College, Edinburgh EH9 2HH, Scotland
Tel: (+44 31) 662 4395 E.Mail: O.Morgan@ed.ac.ukrichi@hpopd.pwd.hp.com (Richard Jennings) (01/24/91)
Olly Morgan writes: > Will you need any special lines for ISDN transmission, or will this > system work on any phone line? If the later applies this is pretty > amazing when considering current modem speeds. (64k/sec is promised?) > What is it about ISDN that allows such greater performances? ISDN is completely digital - it will run over the existing copper pair from the switch to the subscriber - subject to the PTT (BT in this case) approving the results of a BERT (Bit Error Rate Test). Of course, you must be on a digital exchange. Hope this helps, Richard Jennings, Software Development Engineer Pinewood Information Systems Division, the home of HP's Advanced Image Management System (HP AIMS), AdvanceLink, OpenMail and Multi-media communications Hewlett-Packard Nine Mile Ride Voice: (+44)/(0) 344 763738 ADMD=GOLD 400 C=GB Wokingham Fax: (+44)/(0) 344 763526 OU1=Pinewood ORG=hp Berkshire RG11 3LL E-mail: richi@hpopd.pwd.hp.com GN=Richard PRMD=hp England or: richi@hpopd.pwd.hp.co.uk SN=Jennings