Re: [PATCH 0/5] isdn: deprecate non-mISDN drivers

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From: Mihai Moldovan <[email protected]>
To: Birger Harzenetter <[email protected]>, [email protected]
Message-ID: <f75ca0f1-5fec-00d7-0a57-2003259b7789-vwLUhvSDKx8@public.gmane.org>
Subject: Re: [PATCH 0/5] isdn: deprecate non-mISDN drivers
References: <[email protected]>
In-Reply-To: <[email protected]>

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* On 4/24/19 4:47 PM, Birger Harzenetter wrote:
>> It turns out that the suggestion from Karsten Keil wa to remove I4L
>> in 2018 after the last public ISDN networks are shut down. This has
>> happened now (with a very small number of exceptions), so I guess it's=

>> time to try again.
>=20
> It has happened? In which marketing department?
> Maybe it's no longer of relevance to residential customers.
> But for business customers it's quite a different story.
> Most of then still use ISDN lines. From the palces I visit, I'd say may=
be a
> quarter of them have gone VoIP so far. So no sign of an end there.

To be fair, DTAG cancelled my ISDN line back in 2017, even though it was =
a
business contract. SOHO only, no PTP, but still.

mISDN + LCR work pretty badly in NT mode, including locking up often, not=

releasing B channels correctly, having a weird echo etc. in my setup. I'm=
 mostly
forced to use VoIP directly through my asterisk setup when making calls e=
very
once in a fortnight.

mISDN + CAPI emulation in user space is even worse in NT mode; essentiall=
y
useless. I'm misty on the details, though, as to whether the user space C=
API
emulation also needs CAPI kernel support.

Then again, my old and battered Asterisk 11 version also looses connectiv=
ity to
the DTAG SIP peer relatively often these days, which only a restart can
temporarily fix, so the whole setup is wonky at best.


> Indeed, after I posted that pach recently the question has come up agai=
n:
> How amy versions of mISDN do actually exist?
> Who maintains them? And where?
> Is there any coordination going on?
> Does anyone actually even care?

I *think* that there only two. Karstens main repository (which has seen a=
 few
unexpected disruptions and an unannounced move from his own git infrastru=
cture
to a GitHub account, as far as I was able to gather) and the in-kernel
implementation which is supposed to be synced up every once in a while, w=
hen
it's deemed stable. Historically, his repository also contained a few
experimental branches, so I guess you could count them as different versi=
ons.
Most of them are stale, though, and didn't even make the GitHub transitio=
n.



Mihai


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