I have seen a lot of references to SER. Currently, I have: 1 PRI to Telco 1 PRI to old PBX Several SIP phones with the intention of having approx. 200. I do have people that travel with softphones (currently X-Lite, but will be testing EyeBeam for better codec and echo cancel capabilities) Currently the traveling users have to VPN in first which I am sure is adding extra overhead to the calls. I have yet to open my server to the Internet to be accessible to travelers without VPN first. I have done some testing with VOIP provider though my firewall to FWD and VOIPSTUNT. Where might SER help? Why are people using it with Asterisk? -- -- Steven May you have the peace and freedom that come from abandoning all hope of having a better past. --- - --- - - - - - - - -- - - - --- - ------ - - --- - - -- - - - -- - - -
>I have done some testing with VOIP provider though my firewall to FWD and VOIPSTUNT. > >Where might SER help? >Why are people using it with Asterisk? > >SER's SIP implementation is very stable. It will handle a lot more phones than asterisk (but does a lot less than Asterisk too). I use SER to take care of all the SIP registration / signaling issues. Then all PSTN stuff, routing, IVRs, etc. is dealt with using Asterisk. SER also has some fairly adequate NAT helper modules. Cheers, Jean-Michel.
Hi!> 1 PRI to Telco > 1 PRI to old PBX > Several SIP phones with the intention of having approx. 200.> Currently the traveling users have to VPN in first which I am sure is adding extra overhead to the calls. > I have yet to open my server to the Internet to be accessible to travelers without VPN first. > I have done some testing with VOIP provider though my firewall to FWD and VOIPSTUNT. > > Where might SER help?Let's see what I can come up with: * Advantages: - SER supposedly has SRTP encryption support today through an add-on; Asterisk isn't there yet (TLS is missing); with SRTP you can get rid of the VPN tunnel. See: http://www.voip-info.org/tiki-index.php?page=Asterisk+encryption - with SER multiple registrations with the same (!) user credentials become possible - You get the full power of a true SIP proxy permitting you to freely modify SIP messages as you see fit * Disadvantages: - SER documentation isn't ideal especially when it comes to Asterisk integration, and you'll need to dive more closely into the SIP protocol details - SER encryption is not that easy to set up; naturally you'll also need SIP phones that can do SRTP (at this moment the SNOM 360 softphone is probably the only softphone that supports SRTP, however this is rather a test and promotion software for the real hardware phone than a permanent solution for your users) - you'll probably need the VPN anyway for web, email, database connectivity - only if you decide to go for hardware phones instead you might gain by not requiring the VPN - You'll need to get used to and manage two instead of one VoIP system, and that for a case where Asterisk alone would be totally sufficient by itself - You'll need to find a way to handle the MWI issue, see: http://www.voip-info.org/tiki-index.php?page=Asterisk+at+large Cheers, Philipp
On 1/20/06, Steven <asterisk@tescogroup.com> wrote:> I have seen a lot of references to SER. > Where might SER help? > Why are people using it with Asterisk?I simply bring it down to this: Am I service provider? If yes, then I probably want to use SER for my registrations. If not (standalone PBX -- single company), SER may not be necessary. As for the media part of it, unless I'm delivering some sort of "service" or require to listen to the media for some reason (monitoring for example), then I direct the call through Asterisk, else, I direct media directly between end points and get out of the way. Of course, its never this simple, but I find thats a good way of thinking about whether you really need SER or not. I don't really think a single company (unless its got a LOOOOOOOT of SIP phones) probably really even needs SER. Leif Madsen. http://www.leifmadsen.com http://www.oreilly.com/catalog/asterisk
You could also achieve the same result with phones that support some type of failover, such as a simple list of systems to try in order, or DNS SRV lookups. -----Original Message----- From: Jon Radon [mailto:jonr800@gmail.com] Sent: Sun 1/22/2006 4:27 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Cc: Subject: Re: [Asterisk-Users] When/whether to use SER? High availability. If you have multiple Asterisk systems, SER can really make failover a lot less painful. On 1/22/06, Leif Madsen <asterisk.leif.madsen@gmail.com> wrote: I simply bring it down to this: Am I service provider? If yes, then I probably want to use SER for my registrations. If not (standalone PBX -- single company), SER may not be necessary. As for the media part of it, unless I'm delivering some sort of "service" or require to listen to the media for some reason (monitoring for example), then I direct the call through Asterisk, else, I direct media directly between end points and get out of the way. Of course, its never this simple, but I find thats a good way of thinking about whether you really need SER or not. I don't really think a single company (unless its got a LOOOOOOOT of SIP phones) probably really even needs SER.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I have a small simple rule to start with! Di you whant to have peiple calling in with sip to you domin then you have to use SER as a SIP server, and ser as a connection to the telco world. If you are only using the phones for PBX uses - use only Asterisk My 5 cents. best regards jan Steven wrote:> I have seen a lot of references to SER. > > Currently, I have: > 1 PRI to Telco > 1 PRI to old PBX > Several SIP phones with the intention of having approx. 200. > I do have people that travel with softphones (currently X-Lite, but will be testing EyeBeam for better codec and echo cancel > capabilities) > Currently the traveling users have to VPN in first which I am sure is adding extra overhead to the calls. > I have yet to open my server to the Internet to be accessible to travelers without VPN first. > I have done some testing with VOIP provider though my firewall to FWD and VOIPSTUNT. > > Where might SER help? > Why are people using it with Asterisk? >- -- +------------------------------------------------------------------- ! Irial / YASK AB ! Att: Jan Saell ! Box 59, S-692 21 KUMLA, SWEDEN ! Tel: 019-58 25 15 Int +46-19 58 25 15 Fax +46-19 58 38 05 ! E-mail: jan@irial.com ! PGP Fingerprint: E957 23C8 9F51 0958 B9AD 7F18 404A 5DA1 F944 A08B -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFD1JZ4QEpdoflEoIsRAocNAKDJwx0pyB3Y1w2hVqRFxIh1An77jQCg61IZ emsPYxXDxM1gYeeCM8L/6VU=fG5l -----END PGP SIGNATURE-----