On Tue, Feb 16, 2010 at 10:47 AM, Ken Fulmer < kenful...@icstechnologysolutions.com> wrote:
> Dale, > > That's why we're having to use the ITSP functionality of the sipXbridge. > Based on price, we'd like to use the Adtran voice gateway but they don't > handle the SIP REFER messages any better than the Cisco router. > > Any suggestions on an affordable voice gateway that handles SIP REFER > messages? > > Thanks, > > Ken > > > -----Original Message----- > From: Dale Worley [mailto:dwor...@avaya.com] > Sent: Tuesday, February 16, 2010 9:42 AM > To: Ken Fulmer > Cc: sipx-users@list.sipfoundry.org > Subject: Re: [sipx-users] Phones that don't use SIP REFER messages > > On Tue, 2010-02-16 at 09:28 -0600, Ken Fulmer wrote: > > We’ve had some problems with the Polycom phones use of SIP REFER > > messages with Cisco and Adtran voice gateways. Call transfers and > > holds fail due to incompatibilities in the way the Cisco and Adtran > > routers handle these events. My understanding is the routers use a > > mid-call INVITE rather than SIP REFER messages. This forces us to send > > calls through the sipXbridge, like Asterisk, and that limits > > scalability. > > > We’ve noticed other phones in the list like Grandstream , Aastra, > > Snom, etc. Do you guys know which phones in the sipX list work well > > with Cisco and Adtran voice gateways? > > For a phone to work with sipXecs, it must use REFER to execute > transfers. > > Similarly, sipXecs assumes that any PSTN gateway can handle REFER. (The > exception being gateways that are treated as ITSPs, that is, which are > accessed through sipXbridge.) > > If a gateway doesn't handle REFER correctly, it won't work natively with > sipXecs, regardless of the phones that you're using. Tell the > manufacturer that their product is deficient. > > Dale > > > > _______________________________________________ > sipx-users mailing list sipx-users@list.sipfoundry.org > List Archive: http://list.sipfoundry.org/archive/sipx-users > Unsubscribe: http://list.sipfoundry.org/mailman/listinfo/sipx-users > sipXecs IP PBX -- http://www.sipfoundry.org/ > There are a lot: Audiocodes and Patton both support it. What type/density are you looking for? FXO? number of ports? PRI? You're not providing much information.
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