No it's correct and worth noting that the CCNA answer and CCNP(BCRAN)
answers are not the same.
Send complaints to Cisco ;-)
Tim
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
> Snow Jr., Jim
> Sent: Thursday, March 15, 2001 2:44 PM
> To: '[EMAIL PROTECTED]'
> Subject: RE: Cisco1600 ISDN + D channell (& PRI D channel nfas)
>
>
> RE ISDN Rates.... The 192K BRI must be an error, right?
>
> BRI = 2b (112K) + 1d (16k) = 128K
>
> US PRI = 23b (1472K) + 1d (64K) = 1536K + 8K framing/overhead = T1 (???)
> Eur PRI = 31b (1984K) + 1d (64K) = 2048K (E1)
>
> Way off, or ???
>
> Jim Snow, CCNA
> Project Support Engineer
> [EMAIL PROTECTED]
>
> HQ US Central Command
> CCJ2-Requirements, Bldg 540
> MacDill AFB, Florida 33621
> (813) 827-6049
> GENERAL DYNAMICS
> WORLDWIDE TELECOMMUNICATION SYSTEMS
>
>
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
> David Heaton
> Sent: Wednesday, March 14, 2001 9:53 PM
> To: [EMAIL PROTECTED]
> Subject: Re: Cisco1600 ISDN + D channell (& PRI D channel nfas)
>
>
> router(config-if)#isdn x25 dchannel
> allowsd isdn on the d channel for a BRI x25 connection IOS 12.1.2 Desktop
>
> on an e1 PRI ISDN controller you can configure the nfas_d D
> Channel timeslot
> to be backup, primary or 'none' which permits it to be a B channel
>
> which should show up under sh isdn serv as an available channel
> never actually done it myself
>
> as for BRI I've never heard of it being don
> although you can configure lapb (b channel) variables:
> N1 Maximum number of bits per I-frame
> N2 Maximum number of attempts to transmit a frame
> T1 Retransmission timer
> T2 Explicit acknowledge deferral timer
> T4 Keepalive timer
> interface-outage Interface outage deadband (partial T3)
> k Maximum number of outstanding frames (window size)
> modulo Set frame numbering modulus
>
> has anyone ever configured these variables, & if so to fix what problems?
>
> also, does anyone know why BRI is represented as 192K total in some books
> (I though 2B=2x64 + D =16K)
>
> US PRI = 23B + 2 D how big is D (54K?)
> Europe PRI = 30B + D (64K)
>
> what would the carrier use for signalling if the D channel was taken?
>
> Cheer
> David
>
>
> >>> "Brian" <[EMAIL PROTECTED]> 03/15 7:57 am >>>
> I saw that there is isdn technology that allows data to pass along the
> always up control channel. If I remember correctly, it passes 8k
> along it.
> I do not know how commercially available this is. Only use I
> could think of
> is you could then use it for dial on demand inbound, but do you want that.
>
> Bri
>
> ----- Original Message -----
> From: "Damien Kelly" <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Wednesday, March 14, 2001 7:10 AM
> Subject: FW: Cisco1600 ISDN + D channell
>
>
> > Just sending this again, No one commented.. was this a stupid
> question to
> > ask?
> >
> >
> >
> >
> > > Is it true that a cisco can be configured to use the D Channell to
> > > remotely bring up an ISDN line on a remote router configured
> for dial on
> > > demand?.
> > >
> > > I was told sometime ago that a cisco ( also DoD ) could be used to
> > > remotely connect to another cisco on a remote network which is on ISDN
> > > dialup, using the ISDN D Channell. anyone know if this is true, or
> > > possible? anyone have any experience in this?
> > >
> > >
> > > Any suggestions?
> > >
> > > Thanks
> > >
> > > Damien Kelly,
> > >
> > >
> >
> >
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