• While on-hook, press TRSF and then dial 100.• Dial your four digit station passcode.• Dial 1 for locking outgoing, 2 for locked all calls or 0 to unlock.• Press TRSF to store your selection.NOTE: When your keyset is locked for outgoing, the HOLD key will flash.When your keyset is locked for all calls, the HOLD key will light steady.MANUAL SIGNALLING [L VERSION ONLY]Use this feature when you want to send a brief 500ms ring burst to anotherstation, regardless of the status of your phone (on-hook, off-hook, hands-free, DND or ringing).To send a signal to another station:• Press the Manual Signalling (MS) key.• You may press the MS key repeatedly to send multiple signals to the des-ignated station.NOTE: Your phone must have a Manual Signalling (MS) key with a stationnumber extender assigned to it.OFF-HOOK VOICE ANNOUNCEKeysets may receive a voice announcement while on another call. The call-ing station must have an OHVA key. When you are in DND, you cannotreceive OHVA calls. The OHVA feature will work with intercom calls andtransferred calls.To make an off-hook voice announcement:• Dial the extension number or press the DSS key.• When you receive a busy signal, press the OHVA key.• After the attention tone, begin speaking.• Finish the call by replacing the handset or pressing the ANS/RLS or theMONITOR key if you are using a 7B phone.NOTES:1. When you are voice announcing to a station close to you, use the hand-set to avoid an echo effect.2. You cannot off-hook voice announce to single line telephones.37GROUP LISTENINGWhen you are engaged on a call and you are using the handset, you maywant other people to hear the distant party’s voice over the speaker:• Press the LISTEN key to turn on the speaker. The microphone is not inuse, so the distant party does not hear other parties present in your of-fice.• Press LISTEN again to turn the speaker off and resume private conver-sation.• Repeat if necessary.NOTE: Depending on speaker volume and the acoustics of your office, itmay be advisable to turn the group listening feature off before hanging up.This will eliminate a momentary squeal.ACCOUNT CODES [L VERSION ONLY]When equipped with optional equipment, your iDCS 500 system will allowcalls to be charged to a specific account:• During any outside C.O. call, press the account (ACCT) key.• Enter the account code (maximum 12 characters including ✱ and #).Press the ACCT key again. Your conversation will not be interrupted.NOTE: If you make an error before you complete the account code, pressthe ACCT key twice and redial the correct code. Only the last account codedialed will be printed.LOCKING YOUR KEYSETYou can lock your keyset to control misuse of your phone while you areaway. You can unlock it when you return. Your default station passcode is1234.36Make outside calls YES NO NOACCESS DENIEDReceive outside calls YES YES NOMake intercom calls YES YES NOReceive intercom calls YES YES NO0 1 2UNLOCKED LOCKED OUTGOING LOCKED ALL CALLS