If you know your phone system model you can select it under phone systems heading or you can browse down the page to find it by pictures.
DX 80
DX80 time
and date instructionsDX 120
DX120
time and date instructionsSBX IP 320
SBXIP320
time and date instructionsFXII / MP5000
FX
time and date instructionsDSU / DSUII
DSU
time and date instructionsExecutech XE
Extectech
time and date instructions219 West Commercial
Lebanon, MO 65536
Phone 417-532-9819
Fax 417-588-4258