Ah, I just responded in another email. As a general deployment rule we designate remote phones. If you follow the wiki you hard code the phones line pramters to use the external natted ip of the pbx in the outbound proxy. This allows remote phones to work without any dns.
Now, if you want to be able to move phones in and out without any changes, then yes, you need SRV records because the outbound proxy is by default set to "domain.com" which makes polycom phones do a dns lookup. Our general deployments typically dont involve roaming users (in and out) but more of the home office worker that keeps his phone remote. Also, if your not running a clustered sipx, you can modify the phone profile for polycoms to prefill in the outbound proxy as "server.domain.com" which will work both inside and outside without SRV. You just lose the benefit of SRV records. -M >>> Nathaniel Watkins <[email protected]> 03/19/12 6:35 PM >>> I like for my users to be able to take their hard phones anywhere and they just work – can this be achieved by not using SRV records on the outside (assuming you are using SRV records inside the network)…? For example, if the phone is looking for voipdomain.com (SRV) on the inside – I want to plug it into my home internet connection and not have to push a new config or manually change anything for it to work. From: Matt White [mailto:[email protected]] Sent: Monday, March 19, 2012 6:18 PM To: Nathaniel Watkins; [email protected] Subject: Re: [sipx-users] External DNS provider for sipXecs/openUC users? >>> Nathaniel Watkins <[email protected]> 03/19/12 5:23 PM >>> >>Would anyone be interested in providing external DNS services for sipXecs/openUC users? Would end users be willing to pay a small annual fee for this >>service? This would eliminate the headache of setting up SRV records thru a public hosting platform. What benefit is there in having external SRV records? I'm just wondering what your use case is. SRV records are not used for remote workers. The only case I could see would be if sipx had an external ip (no nat) and so the typical remote worker setup wouldnt work. We have a DNS cluster in your datacenter and could host it if there’s a benefit. -m This message and any files transmitted with it are intended only for the individual(s) or entity named. If you are not the intended individual(s) or entity named you are hereby notified that any disclosure, copying, distribution or reliance upon its contents is strictly prohibited. If you have received this in error, please notify the sender, delete the original, and destroy all copies. Email transmissions cannot be guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. Garrett County Government therefore does not accept any liability for any errors or omissions in the contents of this message, which arise as a result of email transmission. Garrett County Government, 203 South Fourth Street, Courthouse, Oakland, Maryland 21550 www.garrettcounty.org
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