Clear-Com HB-704 - Manual (Page 12)

H B - 7 0 2 / H B - 7 0 4 T W O - A N D F O U R - C H A N N E L H E A D S E T 1 - 6
Figure 1-3 HB-702 and HB-704 Cable Wiring
9. Option Board Jumpers: The two jumper plugs, P1 and P3, must be
installed when optional modules are not used. When the optional
four-wire or TW modules are used, both P1 and P3 must be removed.
Save these jumper plugs for possible future use.
Note: The HB-702 and HB-704 will not operate without either these
jumper plugs or the optional modules installed. The orientation
of P1 in J1 and P3 in J3 does not matter.