unable to trace B channel

[Hans Petter Selasky]

On Friday 15 April 2005 18:46, Christoph Hoenig wrote:
> Hi,
>
> I installed 5.3-release in order to trace the b channel with isdntrace
> in analyze mode. Unfortunately I was only able to trace the incoming and
> outgoing D channel data.
>
> # isdntrace -a -b -d -B
>
> Althoug I supplied the necessary -b switch no B Channel data is
> recorded. When turning off the D channel trace like in the command above
> (-d), the size of the binary dump is always 0Kb. With the documentation
> in mind I thought something was wrong about the i4brbch device. But at
> boot time everything seems to work quite well:
>
> kernel: isic0: [GIANT-LOCKED]
> kernel: isic0 at port
> 0xb00-0xb1f,0x300-0x31f,0x1300-0x131f,0xee0-0xeff,0x6e0-0x6ff,0x16e0-0x16ff
>,0x1b00-0x1b1f irq 10 flags 0x4 on isa0
> kernel: isic0: passive stack unit 0
> kernel: isic0: AVM A1 or Fritz!Card Classic
> kernel: isic1: [GIANT-LOCKED]
> kernel: isic1 at port
> 0xa40-0xa5f,0x240-0x25f,0x1240-0x125f,0xe20-0xe3f,0x620-0x63f,0x1620-0x163f
>,0x1a40-0x1a5f irq 11 flags 0x4 on isa0
> kernel: isic1: passive stack unit 1
> kernel: isic1: AVM A1 or Fritz!Card Classic
> kernel: i4bipr: 4 IP over raw HDLC ISDN device(s) attached (VJ header
> compression)
> kernel: i4bctl: ISDN system control port attached
> kernel: i4brbch: 4 raw B channel access device(s) attached
> kernel: i4bisppp: 4 ISDN SyncPPP device(s) attached
> kernel: i4b: ISDN call control device attached
> kernel: i4btel: 4 ISDN telephony interface device(s) attached
> kernel: i4btrc: 4 ISDN trace device(s) attached
>
> The irqs used by my 2 non-PnP ISA Cards (AVM Fritz!) are reserved for
> isa slot use in the bios. I also tried to take a look at the debug ouput
> printed to the screen after a `isdndebug -m`. I don't really understand
> the ouput but at least I didn't found anything that looked like an error.
> Would be grateful to hear about things I can try, as the i4b doc, FAQ,
> Google and mailinglist archive didn't help on solving my problem.
>
> Christoph
>

Which of the two ISDN cards are you using? You might have to add "-u 1" to the 
options line. isdntrace does only trace for one unit at a time and it doesn't 
trace the B-channel unless isdnd and a connection is active on your ISDN 
card.

--HPS