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T.38 version 3 industry support?
by nathana＠fsr.com March 27, 2017

March 27, 2017

Way back when we started looking into FoIP, it was hard to find good ATAs with a quality T.38 implementation (or at least it seemed that way to us). And that's even before touching on all of the interop issues due in part to a poorly-written spec that can be interpreted many different ways. Over the years, things seemed to have mostly settled when it comes to T.38 version "0". ATAs are fairly abundant, and it's not hard to find direct-IP orig and term carriers that can gateway T.38, either. But there are a lot more "Super G3" (V.34) fax terminals out there in the wild these days, and I'm getting tired of us having to explain to end-users that they need to turn that crap off. And my perception (whether accurate or inaccurate) is that most carriers still by-and-large only support version 0 of the protocol, which has no support for V.34 modulation. Is this accurate, or are things gradually changing on this front as well? I haven't even bothered to shop around for and test T.38 version 3 TAs because it's pointless to go to that trouble if nobody can carry that traffic (and we are not really interested in buying a bunch of circuits and gatewaying it ourselves), though even there it sure feels like there are few options. Not even the venerable Adtran line will do anything other than v0 (last I checked). -- Nathan

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Sending CNAM to T-Mobile
by caalvarez＠gmail.com March 24, 2017

March 24, 2017

One of our customers is claiming that when they call their T-Mobile cell phones, the CLID is correct, but they get CNAM such as "Reception1" and "Lab2". Those are the internal names of the phones. This seems impossible. Anyone heard of this being possible? The calls were sent via Onvoy.

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Multicast Paging Device
by robert.j＠bendtel.com March 24, 2017

March 24, 2017

Does anyone have recommendations on a SIP Multicast paging device that would connect to a pre-existing paging amplifier.

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Maximum latency
by caalvarez＠gmail.com March 22, 2017

March 22, 2017

One of our larger customers is about to launch a new call center in Malaysia. The connection there is fast, the trace looks surprisingly clean and short, but latency is consistently at 239-245ms. We've never knowingly had a connection over 130ms. Does anyone have experiences, good or bad, with latency approaching a quarter second? The jitter level seems fine, so I believe they'll just have a delay but decent call quality.

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SecureLogix
by ivan.kovacevic＠startelecom.ca March 17, 2017

March 17, 2017

Anyone using SecureLogix and can comment on their ability to ?Prevent service abuse and malicious or unwanted voice traffic to lower expenses and boost your security and compliance efforts. ? http://www.securelogix.com/Telephony-Denial-Of-Service/index.htm It sounds like it isn?t just an SBC-type prevention of SIPVicious-style attacks, but also TDM blocking based on ? policy fields? call type; absence or blocking of caller ID, call source and destination numbers; call direction; time of call; call length; and certain VoIP call attributes, such as excessive media rate? I understand this can sound appealing, but having had to deal with a few TDOS attacks, I am not sure how well does this would work in practice. Anyone able to comment? Best Regards, Ivan Kovacevic Vice President, Client Services Star Telecom | www.startelecom.ca | SIP Based Services for Contact Centers | LinkedIn <https://www.linkedin.com/company/star-telecom-www-startelecom-ca-?trk=biz-c…>

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What does you use for Hosted PBX and why?
by colton.conor＠gmail.com March 16, 2017

March 16, 2017

What service or soft-switch do use externally to provide to your customer, and why? What do you like and dislike about the platform. Personally, I have used both Broadsoft and NetSapines platforms both through wholesalers. On Broadsoft, I like the feature set and stability of the platform, but I dislike the user interfaces and complexity of setting up simple things like an auto attendant. I also dislike the cost of the platform as simple features like auto attendants incur an additional cost, and many other platforms and competitors these day offer unlimited auto attendants for example. On Netsapines, I like the UI as a basic user can configure most items without ever having to call us, but I dislike the stability of the platform. Might just be the reseller we are using, but they have had over 10 outages now in a couple of month time-frame, and have blamed it on a Netsapins bug. Some of the backend databases for Netsapiens are also not what I consider professional.

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SIP ladder diagram builder
by abalashov＠evaristesys.com March 15, 2017

March 15, 2017

Hello, Is there a nice SIP ladder diagram building utility these days into which one can feed a packet capture and get a ladder diagram out? I see the decaying skeletons of several such ventures online, but what's the new news? sngrep is fantastic for live troubleshooting, but unfortunately its rendering is not export-orientated and doesn't lend itself to automaton. Either image or ASCII output is fine. Just needs to be automatic and exportable. Many thanks! -- Alex -- Alex -- Principal, Evariste Systems LLC (www.evaristesys.com) Sent from my Google Nexus.

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HD / G722
by nick＠flhsi.com March 15, 2017

March 15, 2017

Anyone have a test number that will answer in G722? Looking to do some HD testing. Furthermore, Anyone have any success sending an HD call to any of the wireless guys? VZW/ATT/TMO all seem to support AMR-WB (G722.2) at least on the UE to IMS side. Surely they won't transcode for me 722>722.2? Nick Olsen Sr. Network Engineer Florida High Speed Internet (321) 205-1100 x106

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VoIP Providers and direct NANP access
by peeip989＠gmail.com March 10, 2017

March 10, 2017

Hello VoiceOp'rs In 2015 the FCC released an order which allows non-CLEC VoIP providers to get numbers directly from the NANP: https://www.fcc.gov/document/fcc-releases-voip-direct-access-numbering-repo… This document describes in great detail, well, not much; it doesn?t really get to the heart of the matter ? the *how*. I can think of several ways it * *could** be done, but don't know how it actually **is** done, Is anyone out there doing this today or was part of the trial and willing to discuss and/or maybe point me toward more engineering-y documentation or maybe even (*gasp*) a reference architecture? Thanks, Pete

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Consultants with HPBX platform migration experience?
by Chris.Carabello＠metaswitch.com March 10, 2017

March 10, 2017

Does anyone have recommendations for consultants/organizations with experience in migrating HPBX subscribers across from one call control/softswitch platform to another? Thanks

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