I configured UC540 in my network and its working. I have connection to all endusers. In my company use Alcatel swichboard. Now i want use old numbers from Alcatel. I dont know how can i configure the device with cisco. Both devices are in the same network and i can send the ping.
To integrate the two systems you would need significat support from the PBX techicians to configure and troubleshoot .You would also need specialized support for the Cisco.. Most often due to cost and complication, the best decision is to replace the old system completely instead.