Because you can't get anything less.
You can't get a '1B' ISDN line. BRI is it - and that is 2B+D. The client
side MUST have a BRI to have ISDN. There is no such thing as a "single B
channel DOV line."
On the server side you msut have PRI to offer full ISDN service - that
includes 64K DATA, 56K DATA, and 56K DOSBS (Data Over Speech Bearer Service,
aka Data Over Voice aka Voice).
With a channelized T1 line into the server you can offer 56K DOSBS - but
you CANNOT offer any form of pure DATA ISDN calls.
But this is SERVER side stuff, not client side. They MUST have an ISDN
line to initiate the ISDN call - even if it is ISDN DOSBS.
-MZ
-- Livingston Enterprises - Chair, Department of Interstitial Affairs Phone: 800-458-9966 510-737-2100 FAX: 510-737-2110 megazone@livingston.com For support requests: support@livingston.com <http://www.livingston.com/> Snail mail: 4464 Willow Road, Pleasanton, CA 94588