Select Sound 8028 - Key Lock Function; Troubleshooting Common Issues; No Voice or Audio Problems; Receive-Only Call Issues

› Make a call from two-touch memory
PressMEMOkey,LCDdisplay“LOAD”“-”flash,andthenpresstheNO
(NO.=0~9),thenumberisdialedautomatically.
KEY LOCK FUNCTION
 1.Locknumberledby“0”:inon-hookstate,pressnumberbutton“0”and
 lastaround50secondstillLCDdisplay“SAVE”.
 2.Locknumberledby“9”:inon-hookstate,pressnumberbutton“9”and
 lastaround50secondstillLCDdisplay“SAVE”.
 3.Allnumberlock:inon-hookstate,pressnumberbutton“2”andlast
 around50secondstillLCDdisplay“SAVE”.
Note: Tocanceltheabovesetting,followthesameway.
TROUBLE SHOOTING
› ? No voice
 Checkifthehandsetisonthephoneorlineisbroken.
› ? Receive only
 CheckifP/Tmodeisproperlyset.
› ? Noise
 Checkiftheoutletcircuitisbroken.(Changetheoutletcircuit)
 Checkiftheconnectorismoistorrust(Changetheconnector)
› ? Ring once then disconnect when receive a call. Dialing function
is available
 Checkifconnectorisinamoistenvironment.
 Checkiftoomanyextensionsareusedtogetherorthequalityofextension
 isnotgoodenough(Changethebadextension)
› ? No ring
 CheckiftheunitisinDNDstate,res