February 2023 - VoiceOps - lists.voiceops.org

Alarm panels and how they dial DTMF digits - pots migration from DMS to Metaswitch issue
by nathana＠fsr.com Feb. 13, 2023

Feb. 13, 2023

Matthew Yaklin wrote: > I have not considered that. I work remotely with all of this gear and I would have to guide a tech to do such a thing. I don't think a butt set and a tape recorder would be sufficient to record the audio which is about all I could possibly scratch up without spending money. I have to wonder if there is a way to get the Adtran to dump a copy of the audio in digital form to a local file, that you could then pull off the system remotely. It has to A-to-D it at some point in order to process it, right? -- Nathan

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Players in the US SMS Game / Market
by beckman＠angryox.com Feb. 9, 2023

Feb. 9, 2023

I built and ran operations for a Ringtone company back in 2004-2005, so I have some experience with SMSCs, DLRs, and how SMS generally works. However, over the years, there seems to be a lot of different players in the game, some aggregators, some called something else, and honestly I cannot seem to find any good, well-written, recent information on how and where SMS messages flow in the US. The players I am talking about are NOT the Tier 0 carriers (e.g. Verizon Wireless, T-Mobile, AT&T, US Mobile), and not the CLECs/ILECs we all might work with (Level3, Bandwidth, Inteliquent/Sinch). I'm looking for what companies/vendors might touch SMS messaging that runs between the 3 major US Wireless networks (I believe THEY are all interconnected directly, but maybe not) and all the other SMS-enabled DIDs and Short Codes that are outside of those wireless networks. Here are players I know about, but I do not know what they do and what other carriers use these players and why: - NetNumber - Syniverse - Neustar - SAP - Sybase - TNS Then we have the confusing SMS routing side: ESPID, AltSPID, VSPID, NetNumberID. Back in 2015 a post to VoiceOps stated: "Syniverse and SAP are working with NeuStar to make use of the AltSPID field in NPAC for SMS routing as an alternative to NetNumber. This is expected by the end of the year. If you have wireline number block assignments which are SMS enabled, you may be facing a monthly per-number fee from NetNumber come January 1st. I suggest anyone in this position contact their SMS peering hub and the NPAC Helpdesk for more information." https://puck.nether.net/pipermail/voiceops/2015-November/006074.html I run a few SMSCs and pass messages through them directly to my carriers. With one carrier I use a shared NNID, and with another I have a dedicated/hosted NNID. Here are my questions: - How would one find out through which Vendors an SMS passes, in order to troubleshoot deliverability or receivability issues? - Does anyone what vendor/aggregator that Verizon Wireless uses? - Are the major US wireless carriers interconnected directly, or through yet another vendor? - Has NetNumberID won out over AltSPID? - Why would long code SMS messages NOT generate DLRs from the receiving carrier through these SMS aggregators/vendors? I acknowledge my limited understanding of all the SMS players and the technical functionality here. Any new knowledge is appreciated. Beckman --------------------------------------------------------------------------- Peter Beckman Internet Guy beckman at angryox.com https://www.angryox.com/ ---------------------------------------------------------------------------

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Percentage of US Wireless Calls that fail to reach/ring phone?
by beckman＠angryox.com Feb. 9, 2023

Feb. 9, 2023

Is there any published studies on the number of incoming calls that are placed to a US Wireless mobile number that fail to actually reach or ring the phone? Any studies that go through the most common reasons why that occurs? I am curious about network prioritization, cell tower capacity rules/management, and why, if a cellular device has a "good enough" connection to a tower might the signal to the device that there is an incoming call NOT be sent? I have a lot of customers who get frustrated when there is a call we are forwarding or making to them, and we reach their mobile carrier, but their mobile device does not ring. They say "I'm looking right at it, and you say you're calling it, but it isn't ringing!" As if the wireless network is somehow under our control. There's a lot of marketing about "network quality" and "network coverage" but very little about dropped calls, or calls that fail to start and go straight to Voicemail. Beckman --------------------------------------------------------------------------- Peter Beckman Internet Guy beckman at angryox.com https://www.angryox.com/ ---------------------------------------------------------------------------

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