NEC DT900 ITK-6D-1P Non NEC SIP Firmware

[Hussam_Refai]

I have over 100 NEC DT900 ITK-6D-1P telephone i want to connect them to Grandstream UCM
I opened the phone web interface and did all configuration, in the UCM its shows that the phone is registered and online
but in the phone screen shows ( SIP Server Not Found ) and the phone can't send or receive calls.
someone told me that there is SIP Firmware for None NEC platform, anyone have this firmware ?

 

[DoubleDriveLine]

You need the NEC 3C Standard SIP software and the IP Phone Manager to install the software.

Post your email address and someone will send you the files or a link to them.

Use caution. Test on 1 phone before you go updating all of them. The NEC 3C firmware seems to work in all DT phones but I have not seen a firmware that will take the 1P phones back to NEC SIP.