January 2021 - VoiceOps - lists.voiceops.org

ANIs flagged as telemarketer/spammer/scammer
by abalashov＠evaristesys.com Nov. 14, 2021

Nov. 14, 2021

Hi, So, of course, it is a known problem in the legitimate side of the lead engagement call centre, survey, etc. business that ANIs get flagged as "telemarketer" pretty quickly and start showing up that way on people's phones. Your normative viewpoint on that may vary depending on what you think of lead gen calls, but regardless, a reasonable person would differentiate between: (1) Legitimate outbound dialing operations that are following up with leads who provided their phone number and agreed to be called (at least, as a matter of clicking "accept" on _something_), or for some other legitimate mass-dialing purpose, and who actually own the DID inventory from which they present local-market ANIs and can in fact be reached on those numbers; (2) Illegal spammers who use fake ANIs and call people who did not in any way consent to being called by them. I am trying to learn a bit more about how this is done and what a legitimate, above-board business can do about it. Ignoring the factor of third-party call-screening apps (which most people with a mobile don't use), where is this generally implemented? As I understand it, T-Mobile do it on the network level. I have T-Mobile myself, and probably 2/3rds of unfamiliar numbers, including quite legitimate ones, show up as "Scam Likely" ? I know that's come up on the list before. AT&T displays "Telemarketer"; do they do it that way too, or do they use a Google Android feature for that which they enable as part of their carrier defaults for carrier-issued phones? What about other carriers and Android? As far as I know, Apple don't do anything like this. Do people with iPhones just not receive this "service"? How does that work? Asking where the central, or the most influential authority lies and who provides it goes to the heart of the real question, which is: what can a legitimate business do if their number has been blacklisted this way? As I understand it, the maintainers of these lists, along with the criteria for getting on them, are elusive and inscrutable, and there's really no recourse and no appeals process. I furthermore understand that this has led to the widespread approach of rotating ANIs, but that's a losing battle; they get flagged too. I imagine it won't be long before the criteria for "Scam Likely" are just "number appears to call lots of numbers in this rate centre and otherwise hasn't been around very long". But this is all just conjecture on my part; I really don't know much about how my carrier, anyone's carrier, or some BigCo that's behind my mobile OS decides that a call is a "telemarketer" or "scam" call. If anyone can shed some light on how this really works and what, if anything can be done about it, I would be most appreciative. -- Alex Balashov | Principal | Evariste Systems LLC Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free) Web: http://www.evaristesys.com/, http://www.csrpswitch.com/

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Connecting to Remote Tandems
by voiceops＠ics-il.net July 9, 2021

July 9, 2021

I'm evaluating methods of extending our footprint. I purposely left out company names. One of the companies we talked to was really only interested in getting us the inbound long distance calls, not the local ones. Well, they would, but the terms were vastly different. Given that I still need to build out to connect to the local tandem, what's the point in using a third party to connect to long distance? Are the terms for connecting to the local tandems different because the access tandem is simpler, whereas the local tandem could potentially involve connections to a bunch of other switches, once volume dictated I needed direct connections... and they don't want to deal with that? Are there third parties that don't have vastly different terms for local tandem services? Also, is it likely that I just don't understand what's going on? I went circles with the sales rep to make sure I understood what he was saying, but I could be wrong. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest Internet Exchange http://www.midwest-ix.com

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Peerless issues in NY
by dovid＠telecurve.com Jan. 25, 2021

Jan. 25, 2021

Is anyone else having issues with Peerless in NY? Calls from Verizon and T-Mobile are not completing where the DID comes back to Airus. If the DID comes back to Peerless then it does work. Their NOC same back and blamed it on the Tandem. We have this issue every so often. The solution each time is to update the LRN to Peerless to make it work. I was told Peerless does this as they get paid more if a DID comes back to Airus (I was told this in passing and I have no way of knowing if this is true or not. )

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TPx Contact
by levon＠shiftcs.com Jan. 25, 2021

Jan. 25, 2021

Anyone from TPx that can contact me about a client account... Please reach out to me directly. (I am listed on the account) I cannot get my Account Manager to call me back, and have been on hold for almost an hour trying to get someone on the phone. Thanks, Levon

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False 911 calls and old abandoned DID
by caalvarez＠gmail.com Jan. 22, 2021

Jan. 22, 2021

We have a customer who has received two calls from the police because "they" called 911, but they did not. The CLID shown is NOT one of theirs, but they think it might have been theirs many years ago. The CNAM on that number is their company name. Nobody answers the number, and it's with Qwest. Our logs show no calls to 911 from them. Any advice on this? It's just two calls at this point, just this week. They've been our customer for over five years, and this number has never been on our system.

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ATAs compatible with fire alarm panels
by camille＠alianza.com Jan. 8, 2021

Jan. 8, 2021

Hello all ? looking for recommendations (other than keeping the analog line) for VoIP ATA?s that are compatible with fire alarm panels. Anyone got a good working solution out there? Camille Issa | Vice President, Sales Alianza ? The Cloud Communications Platform Company Call Or Text<sms:+19192294040> 919-229-4040 | camille at alianza.com<mailto:camille at alianza.com> Alianza<http://www.alianza.com/> | Blog<http://www.alianza.com/call-to-the-cloud> | LinkedIn<http://www.linkedin.com/company/alianza> | Twitter<http://www.twitter.com/alianza_inc>

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Voice peering
by ross＠tajvar.io Jan. 5, 2021

Jan. 5, 2021

Based on this presentation [0] from Comcast, they are interconnecting with their biggest voice peers via SIP rather than SS7. They appear to use ENUM for route selection. I'm sure others are doing this too, though I can't find anything public. I'm interested if anyone has more info on how this works. I'm guessing participants maintain their own private ENUM servers and just trust each other? As far as I know the only way to validate number ownership is via an LNP dip, which would be expensive to do for every call. I would like to be able to consume a service like that, at least in an outbound direction; as a small operator, I'm sure convincing large carriers to trust my ENUM server would be very difficult. But having a greater degree of interconnectedness (and mostly importantly avoiding TDM) seems like a good thing. Does anyone have experience with this sort of thing? Thanks, Ross [0] https://silo.tips/download/voice-peering-interworking-sip-and-bgp

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