February 2011 - VoiceOps - lists.voiceops.org

Dumping and sorting out SIP sessions
by ldardini＠gmail.com Feb. 11, 2011

Feb. 11, 2011

Hello, I found a very interesting utility, pcapsipdump https://sourceforge.net/projects/pcapsipdump/ allowing to dump and save on the disk as many .pcap file as many SIP sessions are created in the day. This tool is invaluable to sort out problems with client complaints. Even if the problem has happened few hours ago, you can read all the SIP packets flow and even listen to the audio stream (never tried, but I think wireshark can read such pcap and play you the audio part). The problem is this tool is not working on some of my servers (especially 64bit one). So, is there an alternative? If you do it, what do you use for dumping the SIP sessions? Thank you Leandro

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tradeshow season
by hiersd＠gmail.com Feb. 10, 2011

Feb. 10, 2011

A couple of interesting tradeshows are on the radar: SIPNOC www.sipnoc.org FISPA/WISPA http://fispawispaspring2011.eventbrite.com I'm headed to sipnoc, anyone else going? Thanks, David

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h.323 breech and toll fraud case
by carlos＠televolve.com Feb. 8, 2011

Feb. 8, 2011

A company we work closely with, but is not our customer, had their Cisco Call Manager hacked due to some h.323 vulnerability that I don't have full details on yet. There were a number of calls placed to: 881835211540 881835211556 881835211547 My findings indicate these are Globalstar satellite numbers that cost somewhere between $4 and $7/minute to call, depending on carrier. The victim's carrier is billing them at $6.50. The total bill for the event is around $13k. This is a small company that can't really afford this. I am not an interested party in the sense that it wasn't on our network, but it's a company we work with a lot and want to help. I also want to learn from this to potentially protect our own network. Some questions... 1. What is the scam here? The recipient of those calls doesn't gain anything, and placing a few calls to three specific satellite phones seems to have little purpose. Many of the calls were concurrent. It all happened in the span of just a few hours. 2. Anyone experienced the same thing with those numbers or similar numbers? 3. About a year ago I attended an FBI presentation on VoIP fraud and there was a VoIP specialist who gave his contact info, but I can't find it. What is the best way for this company to report this crime? -- Carlos Alvarez TelEvolve 602-889-3003

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Level 3 issues Tennesse?
by ujjval＠simplesignal.com Feb. 8, 2011

Feb. 8, 2011

We had some customer complains in the east coast & all our gear tested clean. Calling into Level 3 we were told about a fiber cut in Nashville but now there is no acknowledgement from Level 3. Anyone saw call failures, lomg pdds one way audio issues. Issues started about 315 pm mst & went away about 4 pm mst by itself. Ujjval Karihaloo

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DID Exchange
by clec＠cygnustel.com Feb. 7, 2011

Feb. 7, 2011

Does anyone here use DIDX or some other similar service to sell DIDs? We are considering this to make a bit of money, not expecting to get rich, but seems to be a useful revenue stream? Any advice or pitfalls concerning this plan? Thanks! -Eric

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L3 Audio Issues in DC Area
by robert.dawson＠mindshift.com Feb. 7, 2011

Feb. 7, 2011

Anyone experiencing no/one way audio issues for calls terminating into DC on Level 3? Thanks, Rob

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Verizon Business Contact
by clec＠cygnustel.com Feb. 3, 2011

Feb. 3, 2011

Does anyone have a good contact with Verizon Business/MCI? We are looking to do LOA/CFA at some of their sites, will they even sell this service? Thanks a million, -Eric

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Carriers that allow CNAM dips via SIP Subscribe?
by victor＠impulse.net Feb. 2, 2011

Feb. 2, 2011

Hello VoIP Gurus! I'm hoping one of you might be able to help narrow my search. Has anyone had any experience, either good or bad, with any particular carriers in getting CNAM queries working using SIP Subscribes? I have seen a few offer it via HTTP, but that won't work for my platform without developing a custom proxy to translate the SIP to HTTP and back again. Any leads would be greatly appreciated, either on or off list. Thanks! -- Victor Breen, VoIP Systems Administrator Impulse Advanced Communications (805) 456-5800

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CommPartners call failures
by carlos＠televolve.com Feb. 2, 2011

Feb. 2, 2011

We're seeing upwards of 70% call failures with them. Anyone else? Sent from my iPhone

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Good source for international UTC offset/dialing prefix data.
by gmina＠connectfirst.com Feb. 1, 2011

Feb. 1, 2011

Hello, Wondering if anyone can suggest a good source for a table which correlates international dialing prefix to a UTC offset. Thanks, Geoff

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