I have a OS7070 PBX with 7 DS5007S phones.

The first incoming calls to this 7 extensions can be attended, but the second calls can't be attended. Just 1 call can be attended at the same time.

The phones have been configured with CALL 1 and CALL 2 in the buttons 1 and 2, but only work the 1st button.

Why can it be?

DB ATTACHED HERE

Help please!