February 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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PSTN Info
by ross＠tajvar.io Feb. 26, 2020

Feb. 26, 2020

Hi all, I am looking for some resources to help me understand how to interact with the PSTN more directly. I have worked for companies which offered VoIP service, but we've always used other carriers upstream (e.g. Bandwidth, Flowroute, etc.). I've found a few references to the regulatory process (e.g. https://transnexus.com/whitepapers/how-to-get-an-lrn/) What I'm looking for is a technical description of the equipment required and how it works. Does anyone know of any good references for this kind of information? Thanks, Ross

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Recommendation for End User Billing Service
by marylou＠backuptelecom.com Feb. 21, 2020

Feb. 21, 2020

I have a client that is looking for an End User billing service. I figured most of you would have some thoughts on this since you all do end user billing. Please let me know what companies you have used and what you like or dislike about each one. Thanks, MARY LOU CAREY BackUP Telecom Consulting Office: 615-791-9969 Cell: 615-796-1111

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Do Not Originate Registry
by calvin.ellison＠voxox.com Feb. 19, 2020

Feb. 19, 2020

Did the Do Not Originate Registry trial a few years ago ever become a real thing? How does a carrier get access to this data? Regards, *Calvin Ellison* Senior Voice Operations Engineer calvin.ellison at voxox.com +1 (213) 285-0555 ----------------------------------------------- *voxox.com <http://www.voxox.com/> * 5825 Oberlin Drive, Suite 5 San Diego, CA 92121 [image: Voxox]

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NTP Question
by voiceops＠ics-il.net Feb. 18, 2020

Feb. 18, 2020

How many NTP servers do you guys run? I just spun up two NTP servers in different locations on this network. Metaswitch just asked me for at least four (preferably five, or even more). Right now, the ones I have are just referencing the US pool. Eventually, they'll reference on-net GPS-backed devices. Is having four VMs running NTP a ridiculous proposition (well, other than resources, which it'll consume very little)? I should be able to work out putting them on four different physical servers at the moment, but I don't know that we'll have four or more physical servers once I get new ones (and consolidate). Thoughts? ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest Internet Exchange http://www.midwest-ix.com

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Bizarre CNAM behavior
by jay＠west.net Feb. 12, 2020

Feb. 12, 2020

We have a customer that is a book publishing house. For the most part when they make outgoing calls the displayed CNAM is correct. However, for some (but apparently not all) calls they make to Verizon and T-Mobile cell phones the CNAM for their main number displays as the title of a book that they first published in 2006. This is one of thousands of book titles that they have published. Obviously they have never had a telephone account associated with this title. If I had to guess, I'd say that some entity is crawling the web for phone numbers, attempting to associate the results with names, and selling this as CNAM data. Trying to get this fixed is going down a rabbit hole. Has anyone else seen something like this and if so were you able to resolve it? We've frequently run into stale data from cacheing and I know that CNAM issues are hit-and-miss but this is pretty weird. -- Jay Hennigan - jay at west.net Network Engineering - CCIE #7880 503 897-8550 - WB6RDV

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Quality and CLI testing
by dovid＠telecurve.com Feb. 11, 2020

Feb. 11, 2020

We are looking for a carrier that can help us check and validate CLI as well as quality. I looked into this in the past but I can't find my notes on the companies that offered the solution. Does anyone know who offers this?

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Your opinion
by clecny＠gmail.com Feb. 10, 2020

Feb. 10, 2020

Hi, I know US has lots of trade restrictions against Iran , but How legal is it to connect to Iranian voice carrier over SIP? or sell them US termination/origination services? Just wondering , should I connect? is it worth it? Thanks Jay.

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Vitelity / Voyant Colorado Outage
by beckman＠angryox.com Feb. 10, 2020

Feb. 10, 2020

START: 02-09-2020 20:31:39 UTC END: ongoing Vitelity is experiencing some sort of network issue. While the Voyant NOC says they are aware, their portal is unstable due to the 40-50% packet loss and jump from 40-50ms to 375ms round trip times. This is affecting all services AFAICT: API endpoints, Portal, incoming and outgoing calls. We have moved most of our traffic away from Vitelity, except for phone numbers they host, as there is no ETA and 375ms plus 40-50% packet loss means pretty terrible call quality. I'll update as I learn more. --------------------------------------------------------------------------- Peter Beckman Internet Guy beckman at angryox.com http://www.angryox.com/ ---------------------------------------------------------------------------

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