Autor: Szymon Sokol (szymon_at_bastard.operator.from.hell.pl)
Data: Mon 11 Sep 2000 - 15:41:18 MET DST
Piotr Kucharski <chopin_at_sgh.waw.pl> wrote:
: The Basic Rate Interface consists of two 64 Kbps B channels and one 16
: Kbps D channel. Thus, a Basic Rate user can have up to 128 Kbps
: service. The Primary Rate consists of 23 B channels and one 64 Kpbs D
: channel using a T-1 line or 30 B channels and 1 D channel using an E1
: line. Thus, a Primary Rate user on a T-1 line can have up to 1.544
: Mbps service or up to 2.048 Mbps service on an E1 line. PRI uses the
: Q.931 protocol over the D channel.
BTW ktoś tam chyba nie umiał liczyć - 30B+D = 31*64 = 1984, a nie
2048 (tzn. jeszcze 64k w linii E1 pozostaje "bez przydziału).
Na T1 zaś (23+1)*64=1536, co pozostawia 8k "bez przydziału".
-- Szymon Sokół (SS4004,SS316-RIPE) -- Network Manager B Computer Center, University of Mining and Metallurgy, Cracow, Poland. O http://2510053385/~szymon/ PGP key id: 2.x: 0x61094A7D, 5.x: 0xF9289982 F Free speech includes the right not to listen, if not interested -- Heinlein H
To archiwum zostało wygenerowane przez hypermail 2.1.7 : Wed 19 May 2004 - 16:36:41 MET DST