error.. bcran not bcsn ""Amar KHELIFI"" a icrit dans le message de news: [EMAIL PROTECTED] > refer to the BSCN by cisco press by paquet teare for > confirmation.............; > > ""John Botha"" a icrit dans le message de news: > [EMAIL PROTECTED] > > My opinion of in-band and out-of-band: > > > > In-band is when channel control signals are mixed with normal data i.e. > > dialup. > > Out-of-band is when a separate channel is used for link control > information, > > i.e. ISDN D-channel. > > > > Regards, > > > > John Botha > > CS IT Solutions > > Tel: +27 (0) 11 205-7000 ext 6851 > > Fax: +27 (0) 11 807-8992 > > Cell: 082 334 8267 > > E-mail:[EMAIL PROTECTED] > > > > Adding Value to IT > > > > -----Original Message----- > > From: Karen E Young [mailto:[EMAIL PROTECTED] > > Sent: 12 March 2003 07:49 > > To: [EMAIL PROTECTED] > > Subject: Re: PRI [7:64999] > > > > My take on it is... its out-of-band. It's just multiple logical channels > > multiplexed onto a single physical channel. It doesn't matter that the > > logical channels work together, the time slots remain dedicated to their > > respective channels and the traffic doesn't mix. > > > > Just my .02 > > Karen > > > > *********** REPLY SEPARATOR *********** > > > > On 3/11/2003 at 11:37 PM Priscilla Oppenheimer wrote: > > > > >So, here's a question for you all. I saw this on a practice test. Does > > >ISDN > > >use "in-band" or "out-of-band" signaling and is it different for BRI > versus > > >PRI? > > > > > >Well, it's not robbed-bit signaling, from what I understand, which I > guess > > >means it is "out-of-band"? The signaling has its own channel. But the > > >signaling channel is bundled with the other channels in the circuit that > > >your order from the telco. > > > > > >BRI has the 2 Bearer channels and the one D channel that enter the CPE > > >together on a 2-wire circuit. > > > > > >With PRI, in Europe, ISDN enters the CPE on an E1 (4-wire ?) circuit. The > > >15th timeslot is used for signaling. > > > > > >With PRI, in the U.S., ISDN enters the CPE on a T1 4-wire circuit. The > 24th > > >timeslot is used for signaling, if you can believe the books. > > > > > >What would be "the Cisco answer" to the question of ISDN signaling being > > >in-band versus out-of-band? > > > > > >Thanks, > > > > > >Priscilla > > > > > >Jens Neelsen wrote: > > >> > > >> Hi, > > >> > > >> Yes, it is one D channel per PRI. An E1 has 32 timeslots of > > >> 64kbps (=30B +1D +1timing). A T1 PRI has 24 timeslots + rest > > >> (=23D +1D). Timing is in the rest. > > >> > > >> You can save D channels if put more than one E1/T1 in a bundle. > > >> Then you need only one D channel per bundle. > > >> > > >> So the answer is: not more than one D channel per PRI. > > >> > > >> Jens > > >> > > >> --- maine dude wrote: > > >> > Hi All, > > >> > > > >> > Quick question I hope you can help me with. > > >> > > > >> > How many D channels does a PRI have? > > >> > > > >> > I always thought it was two, but its states 1 in most places. > > >> > > > >> > Text taken from the CCNP remote access guide (to make it more > > >> > confusing): > > >> > > > >> > there are 30 timeslots, leaving 2 timeslots for signalling and > > >> > framing. > > >> > Timeslot 0 is used for framing and timeslot 16 is used for > > >> > signalling > > >> > (counting 0-31). E1 PRI makes use of this same principle. > > >> > Timeslot 16 is the > > >> > D channel and timeslot 0 is used for framing information. > > >> > Please advise. > > >> > Regards,DJ > > >> > > > >> > > > >> > > > >> > --------------------------------- > > >> > With Yahoo! Mail you can get a bigger mailbox -- choose a size > > >> > that fits > > >> > your needs > > >> [EMAIL PROTECTED]
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