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Telecom fraud survey
by sahin＠eurecom.fr Oct. 13, 2015

Oct. 13, 2015

Hello, As part of our academic work, we are trying to systematize knowledge on telecom fraud, focusing on voice telephony. For this purpose, we created a high level picture that summarize and organize the fraud ecosystem in different layers, ranging from the inherent flaws in the roots of the system to the final goals of the fraudster. We are now looking for feedback from the industry experts of the field through a survey (should take 5-10 minutes to complete): https://www.surveymonkey.com/r/3CJ7HY9 The responses to this survey will be anonymous and only be used aggregated for research purposes. We will publish a research paper using the results of this study, making this work helpful for both academia and industry. Thank you for supporting our work with your valuable insights. Best regards, Merve

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SIP return message on misdials - 487 or 500/503 or ?
by erickbee＠gmail.com Oct. 12, 2015

Oct. 12, 2015

Hello, Just trying to get idea of what is normal on what providers should return for a misdial, bad unknown number, etc. On one provider, I get a CANCEL and a 487 Request Terminated on mis-dials. On another provider, I get a 503 Service Unavailable and a 500 Internal Service Error back. Is there a proper code to expect or is this up to the provider? I was working on chasing down another issue and noticed a lot of 500 and 503's on calls and they were all misdials (bad numbers, etc) on this one provider. I can't call these numbers from other systems or my cell phone so know they are not good numbers people are calling. Thanks, Erick

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NMS recommendations
by shripald＠gmail.com Oct. 12, 2015

Oct. 12, 2015

Hey All, i'm looking for recommendations for new nms platforms. We currently use one open source platform for CPE and one platform for Core and Infrastructure. I'm looking for a commercial or open source that can handle all devices from Network, Security (Firewalls), Servers (Linux, Windows), ESX, and standard SNMP devices. I need it to be relatively easy to implement and geographically redundant. If i can collapse both CPE and Core into one platform, that would be a bonus. If there is something i should stay away from, please mention that as well. thanks! Shri

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Do you use Bandwidth.com for Termination?
by beckman＠angryox.com Oct. 9, 2015

Oct. 9, 2015

If so, please respond privately. I've got a question about recent SIP responses for you, and if you see what I'm seeing, and also feel that it needs to be resolved, to ask you to open a ticket with Bandwidth to get some movement on the issue. Beckman --------------------------------------------------------------------------- Peter Beckman Internet Guy beckman at angryox.com http://www.angryox.com/ ---------------------------------------------------------------------------

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Cisco 7941 SIP
by peeip989＠gmail.com Oct. 8, 2015

Oct. 8, 2015

Greetings Voice Operators, We have an interesting (code word for annoying) challenge that we've never dealt with before, probably because we don't do much with Cisco phones. We have a new customer coming on who wants to keep their very old Cisco 7941 phones. They have a few offices and the phones work as expected behind an Edgemarc. However, they also have 100+ home users, and that's where the issue comes in. Apparently Cisco introduced a security "feature" where they create the session using a random high numbered port (e.g. 49123) but in the Via header, they say to respond to *private IP, port 5060*. So when the SBC sees the private address it assumes it is being NAT'd through a firewall and replies back to *public IP, port 49123*. What we're seeing is that the home router passes the response back to *private IP, port 49123*, which the phone doesn't accept (because it wants it on 5060) and the REGISTER fails. As you know most home routers are poor at handling ALG (and we've tested and found they are equally bad at handling this scenario). We (and the customer) don't want to troubleshoot 100+ individual home routers. We haven't found a way to turn off this really awesome "feature" so we're trying to find other solutions. Anyone been through this and have any suggestions? Thanks, Pete

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Lack of Quality Industry-wide
by beckman＠angryox.com Oct. 7, 2015

Oct. 7, 2015

In the last 3 months I've been consistently frustrated by my carriers. "3-4 minutes is acceptable delay for delivery of SMS messages." "Our termination change now throws 504s instead of 503s 20-50% of the time and adds 2-3 seconds of delay to your call attempts. We didn't notice, and though you did, it's been 3 days and we haven't fixed it. Sorry!" "There was an outage? Works for me now!" "Someone upstream is intentionally dropping SMS messages. But we can't say who it is, and we can't get them to fix it because they aren't our carrier." Does the industry just suck at knowing when their stuff is broken, or only react when enough customers complain? Do carriers simply not instrument, monitor or graph metrics of their operations and proactively monitor and fix issues? My Thresholds: * SMS delivery end-to-end: Under 10 seconds * 503 Route Advance: Under 1 second * Response/Notice to termination/API/origination/server outage: 20 minutes * Fix a major issue (or provide a fix timeline): 3 days Too many times in the last few months _I_ have been the canary in the carrier's coal mine bringing attention to places where their operations are broken or delayed. And even then, unless I escalate to management (like CEO level), things move at the speed of a sloth. Most of the time it seems I monitor my carrier's infrastructure more closely than they do. I hope and dream of the unicorn carrier -- such great operational awareness and execution that it doesn't matter how great their customer service is, I'll never have to talk to them. Beckman --------------------------------------------------------------------------- Peter Beckman Internet Guy beckman at angryox.com http://www.angryox.com/ ---------------------------------------------------------------------------

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Please remove me from this list
by gwenzit＠gmail.com Oct. 6, 2015

Oct. 6, 2015

-- Greg Wenzel, CCNP Voice

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Unique DIDs vs. Custom extensions
by rafaelpossa＠gmail.com Oct. 6, 2015

Oct. 6, 2015

Hello all, I was tasked to design a system that would give each end user a unique DID from a pool of about 1,000 DIDs total. Every inbound call to a DID would then be forward to the end-users actual phone number (office, mobile, etc..). We would then make data driven decisions based off of the data collected from all these inbound calls: duration, originating area codes, how many calls, frequency, etc.This of course would have previous authorization of each end-user. WIth that in mind, to me it looks like a big waste of DIDs, and I could use custom extensions instead, with a single DID for everyone. Each end-user is assigned a 5 digit code (an extension pretty much) and gets re-routed accordingly. I believe using Asterisk and/or FreePBX I could still collected all the data that is needed. Estimated inbound minutes is 500,000 a month, so that requires another 500,000 outbound minutes because each call is forwarded. One million minutes a month does turn out to be expensive, close to U$8,000/month from some quotes that I have gotten. With all of this in mind, I'd like to know if anyone here has done a similar project and would be willing to share their experience. I am trying to accomplish everything with the minimum amount of resources as possible (money and DIDs, etc). Thank you in advance! Best regards, Rafael

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Gafachi down? Or gone? (from asterisk-biz list)
by beckman＠angryox.com Oct. 6, 2015

Oct. 6, 2015

Forwarding to this list for visibility. On Tue, 6 Oct 2015 11:07:18 Hermann Wecke <hermann at ...> > I read a while ago that Gafachi was running out of business [1], which > at that time was wrong. > > But since yesterday, all my DIDs are dead and their numbers are also > dead (the toll free number has been disconnected). Their web portal is > also dead. Not replying to emails. > > Anyone have any information? > > [1] http://lists.digium.com/pipermail/asterisk-biz/2015-May/036647.html

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SIP software developer
by peeip989＠gmail.com Sept. 30, 2015

Sept. 30, 2015

I'm looking for Java software developers with experience writing large-scale SIP applications. Looking for a full-time hire. If you or someone you know is looking for such an opportunity please contact me off-list. Or if someone knows of a better list to post this please point me in that direction. Thanks in advance.

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