Sure, if the phones are SIP you can try, though they may not necessarily work.
For the integration I would start with looking to see if SIP or H323 trunk is an option on your NEC side, if so that should be your preference as that will not require any additional equipment on Cisco side (cannot speak for NEC). If that is not an option then PRI (ideally QSIG) integration is always an option, that would require PRI port on Cisco Voice GW and PRI port on NEC side with a cross-over PRI cable connecting the 2.
Here is an example config guide for CUCM to NEC integration:
I know this is an old post but I would love to know as well. I have a NEC SV8300 that I would like to use the DT310/710 6 and 12 line phones for my CUCM since they are SIP. I've tried converting to the phones to SIP but I could never get the phone to connect as a 3rd party device.
IntroductionCUCM Routing RulesDial String implementation PolicyCUCM Routing LogicSIP URI Call Routing Analysis+++ Case Study: 1 ++++++ Case Study: 2 +++Conclusion
Over the last few months, I have had the privilege of working on SI...
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...