Broadband ISDN was the umbrella standards effort under which both ATM
and conventional ISDN were developed by CCITT/ITU. The original
scope included:
User protocols:
Narrowband ISDN (BRI and PRI)
Broadband ISDN (OC-3 and OC-12)
Frame relay
Provider protocols
ATM
The standards bodies took too long to develop the true broadband
interface, and the ATM Forum emerged with industry standards. ATM
was never intended to be a direct customer interface, but the ATM
Forum made it an acceptable one. That essentially doomed the
customer broadband ISDN concept. Metro optical Ethernet puts the
final nail in its coffin.
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=34083&t=34037
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