Issue is, if 2nd call comes in - instead of ringing Line 2 on the phone, it rings Line 1 again (flashing, indicating there is another call on line1, instead of rolling down to line 2).
Would someone be so kind as to test this on their SPA504 or 525s and let me know if it works properly? If so, could you tell me the hardware/firmware version of your SPA?
Thank you very much!! Would be a huge help.