posted 01 November 2000 09:11 PM
In WRB #17, Andrew experienced difficulties getting ViaVideo to connect to an IP-based ViewStation and other IP-based systems. Got an IP connection or ViaVideo experience you'd like to share?
Posts: 2 From: Seoul, Korea(South) Since: Nov 2000
posted 02 November 2000 05:57 AM
Andrew, you tried connection between ViewStation at DSL and ViaVideo at cable modem. I worry if it was dynamic IP to dynamic IP connection. I was surprised a lot reading your article that you regard the reason of disconnection as some fault from ViaVideo, not as a network issue. I would like to introduce you my experience. We,KPCom Co., is one of Polycom resellers in Korea. All our staffs have ViaVideo on their Desktop PC for adhoc meeting, with our server connected to an ISP at 1.5Mbps. I received a video call this Monday from a gentleman. He was a professor in California State University at Haywood. He was just touring around in the Polycom directory server, which shows the list of ViaVideo users over the world that are automatically registered at installation of this unit. He called me at 384Kbps through Internet from his campus intranet. He said "Wow, it's unbelievable. Can I reach you through internet with this clear audio and perfect video quality? I just installed ViaVideo and I am just trying a call to anybody available on the directory. I think I'll have no problem at all in setting up a distance learning class with Asian Countries." We had 15 miniutes conference, but we found no disconnection, nor any audio and video clipping. Yesterday one of our staffs carried his ViaVideo to his home to have a test call from his home ADSL to the ViaVideo at the office. He tried the connection test more than 10 times for 2 hours with 100% success. One of my friends in Hong Kong told me yesterday that he did the same from his home ADSL to his office successfully.
If you were just gathering information from the ViaVideo users about the long response time from the Polycom customer support compared to the quick reply from PictureTel as described in your previous issue, I was misunderstood. But if not, my experience can be a good example to potential ViaVideo users.
Thanks, Sewoon
[This message has been edited by sewoon_park (edited 11-02-2000).]
posted 02 November 2000 09:19 AM
Andy, While I do not have a videoconferencing system attached to the network, it has been my experience that Cable Modem connections unlike DSL, ADSL, or any dedicated bandwidth connection are not consistant in the bandwidth available for the customer. The owner of a cable modem should contact their cable company to find out if realtime communications are supported by the network. Also setting the link speed to a lower speed may allow the connection to stay connected. I enjoy reading your newsletter. Keep up the good work. Regards, Rich Rodberg
Posts: 1 From: Worthington, Ohio, USA Since: Nov 2000
posted 02 November 2000 12:12 PM
Andrew, In regards to your Via Video issue. All IP Video Conferencing is greatly affected by the network. When it comes to Cable modems, different cable companies have different guarantees. Some may guarantee 1.5 down but only 384 up. And with your IP overhead you may encounter problems with a 384k Video call. With DSL the same issue applies depending on the flavor of DSL you have(ADSL, SDSL, IDSL etc.). The other major problem you may encounter when Videoconferencing over the Internet is when you start crossing ISP's. When you call from one Video Node on one ISP to another Node on a different ISP, No single ISP can guarantee QOS. We have several clients that Videoconference over the Internet without issue, however they are all using the Same ISP. We have had extensive experience putting these solutions together and welcome any questions you may have.
Regards, Steven A. Brown SBrown@CamSysCo.com www.CamSysCo.com (614) 436-1777 x 11
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posted 01 November 2000 09:11 PM
