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Published on: 6/30/2008
Last Visited: 6/30/2008
See the whole ... Chad Hart Richard Grigonis of of TMC (IMS Magazine, Internet Telephony Magazine) published an article on "Interoperability and Other Testing in IMS".
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A portion of the article was based on an interview I did with him several weeks ago. See the whole article here. Out-of-the-Box Compatibility? At Empirix, one of the most respected names in the testing hardware and software business, Chad Hart, Product Marketing Manager, says, "Interoperability is still a challenge.
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asks Hart."I don't think that's true on a large scale yet.Certainly some of the larger operators have pretty sophisticated interoperability labs where they're demonstrating multivendor interoperability internally, but they haven't deployed to the networks yet, though of course they have plans to do so.Another trend is that many vendors are aware of the interoperability issues and have partnered with some of the best-of-breed component vendors out there to make sure they can interoperate with at least specific vendors or devices." "There are of course economic considerations," says Hart.
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A typical operator is quite happy dealing with one vendor who controls the core network, as long as they're compliant with the IMS specification." "Also, there are vendors out there such as BEA that are working on service delivery platforms or the app server layer, and companies like Broadsoft, that has made excellent traction in this space with their IP Centrex-type business VoIP tech services," says Hart."But those are application server vendors who plug pretty neatly into the IMS architecture, at least in its simplest form today.There are things on the horizon that may muddy the picture a bit.Today, many vendors just plug into an IMS core via an ISC interface. [IMS architecture identifies the interface between a SIP applications server and the S-CSCF as an ISC or ‘IMS Service Control' interface, to perform multimedia session control.] There are other interfaces specified in the IMS architecture and those interfaces are getting to be much more complex and there are things that allow application servers to talk to other application servers or to have app servers ‘share' common elements amongst them, such as presence.The interoperability of devices with those interfaces is probably a few years off, so it won't be commercially viable for a while yet.' "There's also data sharing among these applications servers," says Hart."The IMS architecture allows applications to store user profile information and application-specific information on the HSS [Home Subscriber Server] user database in the IMS architecture.But it doesn't appear that very many vendors are supporting that capability today, and the specifications for actually putting and sharing that user data in a common location is not a mature practice yet.More standardization work needs to be done." "The MSF, or MultiService Forum (News - Alert) holds an event every two years called the GMI, or Global MSF Interoperability event," says Hart.
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Aside from in-depth testing based on key GMI interoperability scenarios such as the optimal media routing of IMS interconnection between subscribers in the MSF R3 domain and legacy networks, the MSF NGN Test Bed will provide demonstration and test facilities supporting MSF members' in-house laboratories. "Our test and monitoring equipment at Empirix continues to be refined, and we help quite a bit with the challenges of IMS interoperability testing, such as complexity," says Hart.
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We did not identify this element in the book or poster and now it seems to be ... Chad Hart
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Here are some excerpts from the article: While interoperability is a core value, this situation makes it exceptionally hard to get vendors from diverse backgrounds and with conflicting commercial ... Chad Hart I recently did an interview with Daniele Tricarico of IMS Vision.
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Here are some excerpts from the article: While interoperability is a core value, this situation makes it exceptionally hard to get vendors from diverse backgrounds and with conflicting commercial interests to interwork. Chad Hart, Product Marketing Manager at Empirix, a US based testing, monitoring and performance solutions provider, believes that complexity and standards ambiguity are the greatest challenges for the true realisation of IMS. "The complexity of the IMS architecture is the main obstacle to real deployment together with standards ambiguity, ev
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How else will it route incoming INVITE requests addressed to ... Chad Hart
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2008-05-01T23:46:39-04:00 I came across this article on Acme Packet today where Seamus Horihan was defending the SBC as a stand-alone network element commenting: "If you look at the history of communications equipment, while many people have pursued [multi-function, all-in-one] 'God' boxes, ... Chad Hart
I came across this article on Acme Packet today where Seamus Horihan was defending the SBC as a stand-alone network element commenting: "If you look at the history of communications equipment, while many people have pursued [multi-function, all-in-one] 'God' boxes, none were ever bought or delivered," he said.
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Then I clicked the link and remembered this article was based on the IMS market research study ... Chad Hart
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I have noticed a trend where many of these operators, especially the smaller ones, are not doing much testing of ... Chad Hart
Nearly all the operators I have talked to who are deploying IMS networks are using SBC's (mainly from Acme Packet).
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On the "IMS Core Testing Reference Guide" section, in the P-CSCF Test section, we show ... Chad Hart
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One side of this poster focuses on Testing- highlighting an example IMS ... Chad Hart Dan Teichman, Empirix's Monitoring Product Marketing Manager, and I put together a new poster covering IMS Testing and Monitoring.
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Most of these are due to inconsistencies between different R7 specifications, so they are not necessarily wrong, just outdated or not yet synchronized: Chapter 3 Section 3.2.6 and Section ... Chad Hart
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