7.4 TROUBLESHOOTING GUIDE162 SYSTEM MAINTENANCE AND TROUBLESHOOTING7.4 TROUBLESHOOTING GUIDETable 36PROBLEM PROBABLE CAUSE POSSIBLE SOLUTIONThe VPS does not operate. • Bad printed circuit board.• Bad connection with PBX.• Card was inserted into thewrong slot.• Incomplete card insertion.• Change the printed circuitboard.• If the phone works properlywhen the SLT is connectedinstead of the VPS, change thePort card. If the phone still failsto work properly, check theconnection between the VPSand PBX.• Insert the card firmly into thenormal card slot.• Insert the card firmly into theback board.Dialing is not registered. • A pulse phone is being used bymistake.• Improper setting of integrationmode.• Change to a touch tone phone.• Adjust the integration modeproperly between the VPS andyour PBX.Line disconnection occurswhile transferring an outsidecall.Outside calls cannot betransferred.• Improper setting of thesequence.• Improper setting of thehooking time.• Improper setting of the CPCsignal.• Adjust the transfer sequence tothat of the connected PBX andreset.• Adjust the hooking time to thatof the connected PBX and reset.• Adjust the CPC signal to that ofthe connected PBX and reset.Unable to make outside calls. • Improper setting of the outsidecall dial mode.• Improper setting of the outsidecall dial procedure.• Reset the outside call dial mode(tone/pulse) properly.• Reset the outside line accesssequence of the connectedPBX.Unable to call an extension. • Improper setting of extensionnumbering plan.• Adjust the extension numberingplan properly.Unable to access themailbox.• Improper setting of the numberof digits in the mailboxnumber.• Readjust the number of digits inthe mailbox number.
