- - - - - - - - - - - - -
While we're at it, someone please explain to me how "Ethernet" can be
considered a "switched" service - assuming that Winston Smith hasn't
amended the definition of the word yet.
Bill Horne
--
(Please remove QRM from my email address to write to me directly)
Message-ID: <t69mub$pof$1@dont-email.me>
Date: 20 May 2022 23:40:00 -0400
From: "Michael Trew" <michael.trew@att.net>
Subject: Re: ISDN's days are numbered: What should you do?
On 5/19/2022 9:05, Bill Horne wrote:
> I was talking to an old friend yesterday, and he told me that he's
> been working from home for a while now, and the conversation turned to
> ISDN phone service, which I recommend to anyone who can still obtain
> it.
>
> 1. Which states still have tariffs for ISDN BRI lines?
I'm not entirely sure how to read this list, but AT&T keeps updating it.
It seems they have a strong push to de-regulate and remove tariffs
from as many regions as possible. It's been explained to me that some
of these listings are "legacy" services, possible ISDN service.
http://cpr.att.com/pdf/dsa/zero_demand_tracker.pdf
Message-ID: <t698lr$j3p$1@tncsrv09.home.tnetconsulting.net>
Date: 20 May 2022 17:36:37 -0600
From: "Grant Taylor" <gtaylor@tnetconsulting.net>
Subject: Re: ISDN's days are numbered: What should you do?
On 5/19/22 9:49 AM, Marco Moock wrote:
> British Telecom at least says that:
> https://business.bt.com/insights/digital-transformation/uk-pstn-switch-off/
>
>> We're moving all our customers from the old analogue public
>> switched telephone network (PSTN) to a fully digital network. We've
>> already started. We plan to have moved everyone over before
>> Openreach stop the PSTN (and ISDN) service in 2025.
I see two very key take aways from BT's statement;
1) "old /analogue/ public switched network" -- I often see "analog"
omitted and people just referring to the PSTN without qualification.
2) "and ISDN" -- Seeing as how ISDN is /digital/* it's nice to have it
called out in addition to the /analog/ (part of) the PSTN.
*Yes, I know that digital eventually depends on the analog domain.
> They also seem to switch off the analog lines (PSTN).
I'm seeing effort to switch of analog lines and ISDN in a lot of places.
Many places have a concerted push to eradicate POTS and / or ISDN. --
I'm using POTS in lieu of "analog PSTN".
I'm also seeing lack of effort / unwillingness to maintain POTS and / or
ISDN more places.
> ***** Moderator's Note *****
>
> I'm assuming that "the old PSTN network" means "the old analog central
> offices and tandem switches (e.g., Step-by-step or crossbar)," because
> I think of ISDN as a "link" protocol that is served via digital
> switches and tandems which carry the "Bearer" channels to their
> destination in digital form, without any A-to-D or D-to-A
> conversions. I think, at least in the U.S., that each Bearer channel
> is still assigned to a virtual-circuit switched connection during a
> phone call.
>
> If I'm wrong, *please* post a correction!
I think that it's more than just Step-by-step and crossbar. I think
it's better summarized by thinking about what's connected to the copper
outside plant that xLECs can viably get rid of / stop maintaining. DSL
being one of the last bastions that depends on at least /some/ copper
last mile. Even that is being transitioned to fiber in many places.
TL;DR: My opinion is ... If it depends on copper last mile, it's
probably on the chopping block. It's only a matter of how long before
it gets chopped.
--
Grant. . . .
unix || die
