Can you tell what the B&O model number on the BeoLine base is?  Should be a seven-digit number on the manufacturing label of the base, either on its back or bottom.  I take it you have a BeoLine base that has two Line-In sockets, as the BeoCom is two-line capable?    Thank you.

To reset your handset: MENU > HANDSET/BASE > REMOVE BASE.  Later you should SELECT or REGISTER BASE.

when i try to remove the handset...it says "failed"

it is a beoline 2 line unit TO84149..the O could be zero....thanks for helping

OK, looks like you do have the right 2-line base and I assume your new handset is also a Becom 1 with LINE 1 and LINE 2 as the two top leftmost buttons.  Did you make sure and unplug the BeoLine , wait 2 seconds, and plug it again?  The BeoLine should flash red for a couple of minutes, signaling open to registration.  Try two things:

1. Technically, you should be able to REGISTER BASE even without first removing the new handset's previous base (Beocom 6000, for instance, can register to more than 1 base).

2. Did you try AUTO REGISTER?

Good luck,

You are correct the handset is a two line unit. I tried the process from the manual, both registering from the handset and the 2 second unplugging. I have also unpugged the battery for one hour and retried....now what is the AUTO REGISTER? By the way I doubt that the Beocom 1 is the same as the 6000 when it comes to registering two bases.....is a trip to the dealer the only thing left?

What happens if (while the red light on the BeoLine is blinking) you just try 'Register to Base' on the handset?

it says "registration failed"

Try resetting the handset to factory defaults:

press 9#9#9*HOLD

turn wheel till it says ‘reset handset’

press ok and turn wheel to ‘yes’ press ok

it will reset, power down, then power up again. 

This clears out everything and allows you to register it to a different base.