Grandstream DP715 IP phones

[ReallyRotten]

Anyone on this forum ever set up a DP715 as a 3rd party SIP device? Have you set up multiple devices with the same handset base? I can get the first phone to register but subsequent phones that share the same base - no go. They don't ring or authenticate to call manager (10.5.2). Further to that, I've added one phone that receives a "registration rejected" from call manager and even after deleting the phone, there is no way to get it registered.

Any suggestions are welcome. I'm maxed out. Shared lines on these phones don't seem to work either.

 

[JKodikara]

Hey ReallyRotten,
I have not configured a DP715 with UCM, but recently evaluated a GrandStream HT503 FXO/FXS adapter as a voice gateway with CUCM 9.1.2. I also needed help in doing this, but GrandStream's tech support was very helpful. You may get some help from them by opening an online trouble ticket.