November 2020 - 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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Verizon Wireless Porting
by voiceops＠ics-il.net Nov. 24, 2020

Nov. 24, 2020

Does anyone know where to go at Verizon Wireless to get set up for porting? My Google-fu seems to be lacking. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest Internet Exchange http://www.midwest-ix.com

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Preventing unauthorized access to SIP device config files
by ciscoplumber＠gmail.com Nov. 17, 2020

Nov. 17, 2020

For providers that have centralized SIP device management that is available on the internet how have you been protecting your configurations from unauthorized access over https? Are there any specific measures that you found most helpful? I am assuming that certificate authentication is probably the best option. For people that are doing this, are you using the factory installed certs from the hardware provider or installing your own certificates on the devices? Are there any lessons learned on using certs that you can share? Thanks

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The number you have dialed is unallocated
by sean＠commandlink.com Nov. 16, 2020

Nov. 16, 2020

Getting this message through multiple carriers this morning, including through google voice? Anyone aware of issues to numbers of "Teleport Communications America, LLC" in PA? Sean

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Recommendations for STIR/SHAKEN Consultants
by David.Zilk＠cdk.com Nov. 12, 2020

Nov. 12, 2020

We are looking for a consultant to assist in the process of implementing STIR/SHAKEN in our network. Has anyone used any consultants for STIR/SHAKEN that they were particularly happy with? David

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606 Responses from Verizon
by David.Zilk＠cdk.com Nov. 9, 2020

Nov. 9, 2020

We are seeing about 10%-15% of outbound calls to Verizon receiving 606 responses. It appears that Verizon has a VoIP Gateway outage that they are investigating. David

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Confusing Spoofing Customers
by ctaloi＠gmail.com Nov. 8, 2020

Nov. 8, 2020

Hey All, We have observed multiple reports of our business customer telephone numbers being used by a bad actor leaving messages for consumers. The consumers receiving the call do not have a direct relationship with us. The bad actor presents ?unknown? as the caller-id and leaves a harsh message asking for personal information and demanding a call back (illegal sounding collector call). The number the bad actor leaves to be called back (in a verbal message) is owned by one of our business customers. So, the response to the ?bad? call goes back to the legit company. The consumer calls our business customer back and explains the message, the business customer has no record of an outbound call to the consumer and is perplexed by the call. We have a few customers impacted by this and in every instance we have no record of the outbound (bad actor) call leaving our network. I can?t figure out the scam here, they aren?t pumping traffic and the call goes back to the legit business, leaving no opportunity for the bad actor to engage with the consumer. Anyone have any thoughts?

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