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SIPNOC - tech and business methods make it worth attending
by lindsey＠e-c-group.com May 11, 2015

May 11, 2015

Folks -- I like the SIPNOC conference <http://www.sipforum.org/content/view/369/270/>, the meeting of we who do VoIP in a serious way. Sure, you can read the <http://www.sipforum.org/component/option,com_docman/task,cat_view/gid,149/I…> PDFs <http://www.sipforum.org/component/option,com_docman/task,cat_view/gid,138/I…> online <http://www.sipforum.org/component/option,com_docman/task,cat_view/gid,123/I…> afterwards <http://www.sipforum.org/component/option,com_docman/task,cat_view/gid,111/I…>. But that's just smelling the aroma, not eating the food. Here are some of my favorites over the years: -- Engineering SIP Timers. Samuel Rausch of Comcast talked about how they tuned and tested the SIP timers, T1, T2, etc., and gave an overall introduction to all the timers. -- A tour of SIP over IPv6 and real-world stories on deploying SIP over IPv6. Which headers need to be changed? -- XO's Method for onboarding SIP trunking customers with self-tests. The key idea here: don't certify. Let customers run the tests and have infrastructure that makes it easy for the service provider to determine if they work. -- Lots of details on Faxing over VoIP. Including insight on the T.30 codes and acronyms, how T.38 and VoIP makes it harder, and workarounds used in the T.38 implementations. -- Bill Salmon of InComm focused on how to manage the risks of migrating to VoIP carriers you can't trust; e.g., "feathering" traffic to a new carrier without exposing your entire customer base. (This is really a very important idea when you can't completely trust a new service.) -- Finding and working around RTP Media Problems, like big jumps in timestamps, and changing RTP streams with new SSRCs in a talk by David Hiers of ADP. -- Nasty problems in RTP and audio quality that can be fixed in SBCs or other middleboxes. These talks are given by the people who write the software that does it. If you want your company to be associated with such in-depth coolness, sign up to sponsor. <http://www.sipforum.org/content/view/369/270/#sponsorships> This year at SIPNOC, Sherwin Crown and I are teaching a day-long technical intro to VoIP on June 23. If you need to get up to speed fast, bring your questions and your manager. SIPNOC is just outside the Washington-Dulles Airport <http://www.sipforum.org/content/view/369/270/#venue>. Register online <http://www.sipforum.org/content/view/369/270/#registration>, or shoot me any questions. --- mailto:mark at ecg.co tel:+1-229-316-0013 http://ecg.co/lindsey

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Rural call completion hotline
by peter＠4isps.com May 6, 2015

May 6, 2015

http://www.telecompetitor.com/verizon-rural-call-completion-hotline-launche… -- Regards, Peter Radizeski @ RAD-INFO INC Circuits * Bandwidth * Consulting (813) 963-5884

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Rural call completion hotline
by april＠teliax.com May 6, 2015

May 6, 2015

Spent most of Monday watching the presentation. Kudos to Verizon for making it publicly available. If anything, it's a window into the industry's feelings on RCC and perceived pain points. It's good information for a mid-size LCR/IXC to have when working with larger carriers. At times, the talks felt a little finger-pointy with RLECs always being painted the victim, and not (to Jay's point) sometimes complicit in their own "problems." It was a little harsh to hear some of the rhetoric against "bad actor LCRs," and the open source community, especially having spent so much of our time building an advanced LCR network, taking trouble ticket reports seriously, and doing it all with FreeSWITCH/Kamailio and the ilk. On the flip side, having worked with LCR carriers who have absolutely no idea what they're doing is infuriating and makes the rest of us look bad... Rural call completion is definitely A Thing, and will continue to be A Thing even with the advent of mobile networks, a move to packet-switched (VoLTE in the countryside, anyone?) technologies, and especially with the race-to-the-bottom attitude that so many carriers (LCR or not) seem to take. Quality (however you measure it), as usual, is the first thing to go, and the entire industry suffers for it. The take-away for me was, choose carefully your vendors, manage them tightly, don't save a penny to lose a dollar, and that when it comes to being an LCR, reputation is everything.

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Polycom BLF w/ SBC
by david＠ringfree.biz April 27, 2015

April 27, 2015

HI All, Has anyone ever had luck with getting Polycom BLF to work through a non-Broadworks SBC? We're looking at internally moving to a SEMS based SBC.. However we've had 0 luck so far with getting any BLF from Polycom to function... Thanks David -- [image: Ringfree Communications, Inc] <http://ringfree.biz/> David Wessell / President 828-575-0030 x101/ david at ringfree.biz Ringfree Communications, Inc Office: 828-575-0030 / Fax: 888-243-7830 PO BOX 1994 Hendersonville, NC 28793 http://ringfree.biz This e-mail message may contain confidential or legally privileged information and is intended only for the use of the intended recipient(s). Any unauthorized disclosure, dissemination, distribution, copying or the taking of any action in reliance on the information herein is prohibited. E-mails are not secure and cannot be guaranteed to be error free as they can be intercepted, amended, or contain viruses. Anyone who communicates with us by e-mail is deemed to have accepted these risks. Company Name is not responsible for errors or omissions in this message and denies any responsibility for any damage arising from the use of e-mail. Any opinion and other statement contained in this message and any attachment are solely those of the author and do not necessarily represent those of the company.

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(no subject)
by myaklin＠firstlight.net April 24, 2015

April 24, 2015

What ticks me off is the lack of the authorities and the largest telephone companies giving a crap about hunting down where these fraud calls are going and getting them shut down. Also are the large telephone companies even paying the terminating telephone company or just pocketing the fraud money themselves? Because they seem to enjoy billing the victims and if the victim does not pay they will turn off their service. Seems like a telephone number can be tracked right to the telephone company who delivers the call to the end user which means the end user can be questioned to determine what is really going on. Yes I know they go over seas but the worst telephone companies who know fraud is happening can simply be told we will no longer deliver calls to you period. Clean your act up or live in your own little cut off piece of the world. Or am I naive? This is not like hacking on the internet. These are telephone numbers which can easily be traced to exactly who is paying for the service and the telephone company terminating the call. Matt P.S. resending to the list because my new email address was not on the mailing list. my old was. just added it. ________________________________ From: VoiceOps <voiceops-bounces at voiceops.org> on behalf of Mark R Lindsey <lindsey at e-c-group.com> Sent: Friday, April 24, 2015 1:24 PM To: Rob Dawson Cc: voiceops at voiceops.org Subject: Re: [VoiceOps] (no subject) I talk to a lot of service providers that are improving their security in the aftermath of fraud. When they're recovering from a fraud event: -- They're coping with a loss of tens-of-thousands of dollars. -- The ops teams must answer to senior management about how they let this happen. -- They're confounded to know how the attacker figured out their password scheme, or their phone config file names. -- Sometimes they're frustrated to find a silly mistake that was made long ago, and never fixed. -- Sometimes they're concerned about an insider threat. (Is somebody selling our list of MAC addresses necessary to download all the config files?) -- They may have legal questions, because in hosted PBX and SIP trunking, knowing exactly who's responsible for the security and who's got to pay for the fraud is unclear. So for several reasons, you'll find them in poor spirits, and seldom ready to chit-chat. All that said: good, informal relationships among the engineers and ops folks at different service providers can help a lot. Go to SIPNOC every year and meet your peers at other SP's. And go to your vendors' events, like the BroadSoft and Metaswitch customer meetings. Get to know some other tech folks, and keep in touch. And of course, we consultants can help too. People from ECG and other consulting firms do promise to keep secrets of our clients, but we also learn the techniques and know-how used by the fraud attackers and the defenders. --- mailto:mark at ecg.co tel:+1-229-316-0013 http://ecg.co/lindsey On Apr 24, 2015, at 13:06 , Rob Dawson <rdawson at force3.com<mailto:rdawson at force3.com>> wrote: I wasn?t necessarily thinking of a commercial solution, something more ad hoc, but they do have some pretty innovative and cool solutions. Rob From: Alex Hardie [mailto:ahardie at bellsouth.net] Sent: Friday, April 24, 2015 11:55 AM To: Rob Dawson Cc: voiceops at voiceops.org<mailto:voiceops at voiceops.org> Subject: Re: [VoiceOps] (no subject) Have you looked at PinDrop? They specialize in toll fraud for both enterprises and carriers. Alex Hardie alex hardie | ahardie at bellsouth.net<mailto:ahardie at bellsouth.net> | +1 404 229 7635 On Apr 24, 2015, at 11:51 AM, Rob Dawson <rdawson at force3.com<mailto:rdawson at force3.com>> wrote: Anyone aware of a voice fraud mailing list or listing service? Something of a repository of new attack vectors and remediations or something . . . just thinking it would be cool to see what new attacks people are running into. If not, any thoughts on something like this? Rob _______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org<mailto:VoiceOps at voiceops.org> https://puck.nether.net/mailman/listinfo/voiceops _______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org<mailto:VoiceOps at voiceops.org> https://puck.nether.net/mailman/listinfo/voiceops

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(no subject)
by rdawson＠force3.com April 24, 2015

April 24, 2015

Anyone aware of a voice fraud mailing list or listing service? Something of a repository of new attack vectors and remediations or something . . . just thinking it would be cool to see what new attacks people are running into. If not, any thoughts on something like this? Rob

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IXC/LD No audio or delayed audio
by steve.starr＠daystarrfiber.net April 23, 2015

April 23, 2015

A growing number of IXC/LD calls inbound into us have either no audio or delayed audio. We are attempting to narrow down the common carrier, but this is a difficult task. We have IXC trunks with multiple providers. So far it seems to be mostly our ATT trunks and Neutral Tandem trunks. ATT being TDM and Neutral Tandem being VoIP. This leads me to believe it is an IXC carrier causing the trouble and not circuit trouble. Also, it is just inbound. When our customer returns the call it is fine. If the person calls our customers tollfree it completes fine. Is anyone else experiencing the trouble? Does anyone have any contacts at ATT that might be able to assist? Thank you, :: Steve Starr :: Daystarr Communications :: steve.starr at daystarrfiber.net :: v - 989.720.6000 :: f - 989.720.6060

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Broadsoft SCA
by colton.conor＠gmail.com April 23, 2015

April 23, 2015

We are using Broadsoft with Polycom VVX phones. We have noticed when we have a seat that has a primarily phone and then a secondary Shared Call Appearance phone, there are certain tasks on the primary phone that we can not do or see on the secondary SCA phone. I am trying to determine if these are Broadsoft/Polycom limitations, or if we have something configured wrong. For example. 1. If a call come in, both phones ring. If you pick the call up on the primary phone, and then place the caller on hold, the secondary SCA phone's line will flash. You can hit the flashing line, and resume the call on the secondary SCA phone. However, we can't do the opposite. If a call come in, and the call is picked up on the secondary SCA phone, and you place the caller on hold, you see nothing on the primary phone's line. The line does not flash, and there seems to be no apparent way to resume the call. 2. BLF's show up on the primary phone's screen, but not on the secondary SCA's screen. Is that normal? I am not to familiar with provisioning, but I know these phones are provisioned using Broadsoft DMS. Does Broadsoft DMS have a different template for a primary phone vs a SCA phone? If so I am thinking something is missing on the SCA template that is on the primary.

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PoE Switches
by colton.conor＠gmail.com April 22, 2015

April 22, 2015

Which low cost 24 and 48 port gigabit PoE switches are most VoIP providers deploying to small business customers? I have heard many are using the Cisco Small Business switches, but some of these are now EOL.

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Easy ways to measure PDD
by beckman＠angryox.com April 22, 2015

April 22, 2015

So after a recent discussion about how to quickly diagnose SIP calls from packets (tcpdump + sngrep for the win!), I'm now wondering if there is a tool I don't know about that would be able to parse the same .pcap file that contains all of my port 5060 traffic and output the PDD time for each call found within. Bonus points if I can specify a time/date range. I don't want to manage yet another server or metrics repository in order to hold all of this call data, so some of the larger (and pricier) tools mentioned before are out for me. I've contacted the author of sngrep and though the packet capture code is already there, he reasonably doesn't want to turn sngrep into sipawk or sipsed. Beckman --------------------------------------------------------------------------- Peter Beckman Internet Guy beckman at angryox.com http://www.angryox.com/ ---------------------------------------------------------------------------

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