X-Account-Key: account1 X-UIDL: 139763 X-Mozilla-Keys: Return-Path: X-ListServer: CommuniGate Pro LIST 5.1.3 List-Unsubscribe: List-ID: List-Archive: Precedence: list Message-ID: Reply-To: "OS/2 Wireless Users Mailing List" Sender: "OS/2 Wireless Users Mailing List" To: "OS/2 Wireless Users Mailing List" X-Original-Message-ID: <475639CF.2050109@2rosenthals.com> Date: Wed, 05 Dec 2007 00:40:31 -0500 From: "Lewis G Rosenthal" MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Subject: Re: [OS2Wireless] OT: Switch problem Hi, Jeff... On 12/05/07 12:22 am, Jeffrey Race thus wrote : > Due to excess of accessories over number of ports on my dsl modem/router > (Speedstream 5681) I have interposed a GigaFast EZ500-S 10/100 Mbps > NWay Switch to serve a printer and computers. These work fine, but my two > VoIP adapters cannot complete the login process so the VoIP numbers do > not function when their adapters' lan cables pass through the switch instead > of to the router directly. The diagnostic message on the Linksys IP phone > display suggests it is stalling at a DNS lookup. > > I'd appreciate if someone could either tell me what I am doing wrong, what > is the simple fix, or what more I need to read or do to educate myself to > diagnose and solve this kind of problem on my own. > > Are the phones configured for DHCP? If so, are they able to obtain leases? If they are configured for static IP, can you ping them from something else on the network when they are connected to the switch? In very rare instances, devices will refuse to work properly with particular switches. I have seen this with otherwise perfectly usable HP ProCurves, where certain Compaq (or HP!) Proliant servers simply refused to properly negotiate full duplex, forcing me to lock them down to half (switches are inhernetly full duplex capable devices, whereas hubs are half duplex). It is possible that the switch ports on your router are able to allow the phones to properly negotiate link speed and duplex, and the ports on the GigaFast for some reason are not. You might try substituting a different switch, but as long as you can get traffic to pass the switch, I see no valid reason why DNS (typically TCP port 53, or UDP port 53) would fail going through: a switch is not a firewall. HTH -- Lewis ------------------------------------------------------------ Lewis G Rosenthal, CNA, CLP, CLE Rosenthal & Rosenthal, LLC Accountants / Network Consultants New York / Northern Virginia www.2rosenthals.com eComStation Consultants www.ecomstation.com Novell Users Int'l www.novell.com/openenterpriseserver Need a managed Wi-Fi hotspot? www.hautspot.com ------------------------------------------------------------ =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= This message is sent to you because you are subscribed to the mailing list . To unsubscribe, E-mail to: To switch to the DIGEST mode, E-mail to To switch to the INDEX mode, E-mail to Send administrative queries to To subscribe (new addresses), E-mail to: and reply to the confirmation email. Web archives are publicly available at: http://lists.2rosenthals.com This list is hosted by Rosenthal & Rosenthal, LLC P.O. Box 281, Deer Park, NY 11729-0281. Non- electronic communications related to content contained in these messages should be directed to the above address. (CAN-SPAM Act of 2003) =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=