Turns out this was not the manual i was looking for. The concertmate 670 keyboard i have is a "Realistic" model made for Radio Shack and none of the diagrams on the owners manual i received matches up. HOWEVER, I must say the service Owners Manual provides was fast and efficient by being available online. The manual was in good readable condition and easily downloaded.
Thank´s for your help, I already recived these manual from you
Text excerpt from page 9 (click to view)
Using the Intercom (if there are at least 2 handsets)
This feature allows you to make free internal calls, transfer external calls from one handset to another, use the conference option and the babysit feature (room monitoring).
Press to call the selected handset + handset number (for example Hang up. Note: if the handset does not belong to the Philips DECT 521/525 range, this function may not be available. ).
.ast call transfer when on line
During a call you can transfer the call without waiting for the other handset to pick up. All the handsets will then ring. Press to call the other handset. Hang up. Note: the person on hold hears music. A press on allows you to switch between the 2 calls.
Call transfer to a specific handset when on line
During a call you can transfer the call to a specific handset. Press to call the selected handset + handset number (for example Hang up. Note: the person on hold hears music. A press on allows you to switch between the 2 calls. ).
Call transfer via the in-call options
During a call you can transfer the call via the in call options. Press to enter the options (with handset 1). Scroll to Intercom and press to select. the one you want to transfer the
If there is only one additional handset, it rings automatically. Otherwise: Browse through the handset list and select with call to. 8 Intercom