I looks like it is on page 217 of the Administrators guide. It appears the default is 3600 seconds which should work. You may want to try something a little bit shorter and see if the phone stay up.
Registration timer value * This field determines whether the phone sends an expires header in the REGISTER messages that it sends, and if so, to what value it sets it. The expires header in a REGISTER is a suggestion to the Registrar server of how long it should be before the phones registration expires. To stop its registration from expiring, the phone has to send another REGISTER to the Registrar before its current one has expired. The ex- pires value which the phone sends is only a suggestion - the actual val- ue to be used will be supplied to the phone by the Registrar in the OK message that it sends in response to the REGISTER. Normally this will be the same as the value that the phone has suggested, but if the sug- gested value is outside the Registrars range of acceptable values, then it could be different. * The phone actually adds 60 seconds to the value that is puts into the expires header, so that if the REGISTERs that it sends get delayed be- cause of a congested network, they will still arrive at the Registrar be- fore the registration expires. * As an example, if 10 seconds is entered as the Registration Timer val- ue, the REGISTER messages that the phone sends will have an expires header of 70 seconds (10 + 60). If 70 seconds is lower than the Regis- trars lowest acceptable value, it will ignore the suggested value and send back its lower limit value, e.g. 90 seconds. The phone will sub- tract 60 seconds from this, and use that as the amount of time to wait before sending its next REGISTER, so 30 seconds (90 - 60) later it will send out its next REGISTER. * If the Registration Timer is set to 0, the phone will not put an Expires header into the REGISTER messages that it sends - i.e. it will not make any suggestion to the Registrar of how long it would like the registra- tion to remain valid. * Value range table: Permitted values alphanumeric Range 0, 10 ... 4320 seconds Default value 3600 seconds * Editing by phone: Number Editor page 163. From: Gilmour, Scott [mailto:[email protected]] Sent: Friday, March 20, 2009 4:38 PM To: Becker, Jesse Subject: RE: [sipx-users] sipx version 3.11 Jesse, I cannot find the information about the registration timer on my Siemens Optipoint 410 advance Phones. I will keep on looking for that info. Scott From: Becker, Jesse [mailto:[email protected]] Sent: Friday, March 20, 2009 4:34 PM To: Gilmour, Scott Cc: [email protected] Subject: RE: [sipx-users] sipx version 3.11 Scott, You can add customer options to Windows DHCP. I had to add options 150 for our Cisco phones. Open DHCP under Administrative Tools. Right click your server and left click Set Predefined Options. Give the options a name, enter code 120, and specify what type of value it will contain. Once that is done you can configure the global scope option or individually for each scope. Also, what register expiration timer are you using on your phones? Jes From: [email protected] [mailto:[email protected]] On Behalf Of Gilmour, Scott Sent: Friday, March 20, 2009 3:55 PM To: [email protected] Subject: Re: [sipx-users] sipx version 3.11 Hi, I just want to add some information to this question. If I am behind a router could this issue have anything to do with DHCP Option 120. I notice that this could be needed in some cases. But my phones worked when I first brought them up then they lose contact overtime and I am unable to make calls. So I was wondering if DHCP Option 120 would help? The only problem I don't see this option on my Windows 2003 server R2. How would I configure this if this is needed? Thanks Scott From: Gilmour, Scott Sent: Thursday, March 19, 2009 9:28 PM To: '[email protected]' Subject: sipx version 3.11 Hi, I have sipx version 3.11. On a daily bases I need to reset the sipx server in order for my phones to come up so I can make a call.. I reset the server and the Siemens optipoint 410 phones come up and go right from saying they are registering to coming up so I can make a call. I am not sure how long it takes for the phones to go from being up to trying to register. I have been waiting for 4.0 so I can upgrade to the latest sipx server. Has anybody else had this issue. I am wondering if it has something to do with dns. Is there anything special I need to do on my dns server. I have created forward and reverse lookups but this hasn't helped my issues. Thanks Scott
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