[VoiceOps] [External] Re: 9-8-8 dialing when an outside line access code (9) is being used

Ross Tajvar ross at tajvar.io
Mon Jul 18 02:39:36 EDT 2022


>
> If you still want to allow 7-digit dialing and have a local 88X prefix,
> or if your dialplan allows 10-digit calls without a leading 1, then yes,
> you'll need a timeout. Or make it 9-988 until they pass another law.
>

 I think they already did:
https://www.fcc.gov/consumers/guides/ten-digit-dialing
Relevant excerpt:

> If your company uses a PBX or VoIP phone system, you may need to update or
> reprogram it for 10-digit dialing. The transition to 10-digit dialing must
> be completed by July 15, 2022.
>

On Mon, Jul 18, 2022 at 2:20 AM Jay Hennigan <jay at west.net> wrote:

> On 7/17/22 21:19, Hunter Fuller wrote:
> > We operate a system with the "dial 9" scheme (apparently "useless"
> > according to other posters - a truly insightful attitude that I love
> > to see on this list),
>
> It's not unusual in old-school PBXs and wireline POTS where digits are
> processed serially. With cell phones dialing is en-banc with a SEND
> button so digit patterns no longer need to be unique. See note on
> en-banc dialing below.
>
> > so I can say that the expectation definitely is
> > NOT for people to dial 9911. In fact, there is a whole law about it,
> > which, like many, is written in blood:
> > https://www.fcc.gov/news-events/podcast/personal-story-behind-karis-law
>
> This did take some special programming, however. The leading 9 is a
> trunk access code and should return a second (often different sounding)
> dial tone. The law to which you refer is because of PBXs that weren't
> specially programmed to re-insert the stripped "9" and send the call on
> its way. The original expectation was "Seize an outside line (by dialing
> 9) wait for dial tone, dial 9-1-1."
>
> When I was programming Mitel PBXs back in the day, I ensured that both
> 9-11 and 9-911 would get routed to 9-1-1 regardless.
>
> > The difference is, if someone picks up a phone and dials 911, they
> > want 911. They don't want an "outside line" so that they can dial a
> > NANP 10-digit number beginning in 11, because no such number exists.
> > The problem is, such numbers DO exist that begin with 88, so, we are
> > in a bit of a pickle there. It seems the only solution is to do a
> > timeout... yeesh. (Unless I'm missing something.)
>
> Kinda, sorta. 7-digit local dialing is supposed to have been phased out,
> with all NANP numbers represented as 1+NPA-NXX-XXXX.
>
> This means that after your trunk access 9, you should expect a 1
> (followed by ten digits for a regular phone number), a 0 for operator or
> 011 international, or a three-digit code starting with 2 or 9 that until
> this week always ended in 11.
>
> > Dialing 911 directly (not 9911, but just 911) has always worked here,
> > long before Kari's Law, and it works without delay, as it should. I'd
> > love to make 988 work the same way but I'm just not sure how to
> > accomplish that.
>
> Program 88 as a sequence to re-insert the stripped 9 and send
> immediately on trunks accessed by a 9, just like you do with 11.
>
> If you still want to allow 7-digit dialing and have a local 88X prefix,
> or if your dialplan allows 10-digit calls without a leading 1, then yes,
> you'll need a timeout. Or make it 9-988 until they pass another law.
>
> Note: In fact, en-banc cell dialing broke a few advertisements where a
> word was spelled longer than 7 digits. For example, "Dial
> 1-800-HARDWARE" worked fine from a landline or (with prepended 9) from a
> PBX. As soon as the digits 1-800-427-3927 were dialed, the call would
> complete. With a cell phone, however, the number sent is 1-800-427-39273
> which doesn't match a valid number and the call would be rejected. Some
> cellular carriers have worked around the issue and truncate long strings
> to match the NANP.
>
> --
> Jay Hennigan - jay at west.net
> Network Engineering - CCIE #7880
> 503 897-8550 - WB6RDV
> _______________________________________________
> VoiceOps mailing list
> VoiceOps at voiceops.org
> https://puck.nether.net/mailman/listinfo/voiceops
>
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