Here are the BSP references:

502-541-404 iss 4.

563HB, HBM. (modular) No speakerphone compatibility.

502-542-400 iss 1

1563HB. No speakerphone compatibility.

502-543-400 iss 4

2563HB, HBM (modular)No speakerphone compatibility.

In all of the above, the line cord leads associated with speakerphone are stored on vacant screw terminals, or insulated & stored.


Arthur P. Bloom
"30 years of faithful service...15 years on hold"