34 S-ICX (International) issued October 2000 S-ICX-50-200Applications:• Any company that experiences short, temporary periods of high traffic and needs toensure that calls are answered• Backup support functions to cover void periods of the workdayDISA (DIRECT INWARD SYSTEM ACCESS)Description:Any number of exchange lines can be assigned to DISA lines which after being accessed, willenable the incoming caller to dial any extension within the system. Or, if the proper security codeis entered, the caller will be able to access outside lines. Remote programming can also be doneover these lines after entering a password.Benefits:• Allows internal personnel to access the system without tying up the attendant or otherlines coming into the system.• Enables people who are away from the office to access FX (Foreign Exchange),Network, etc., to make long-distance calls using less expensive means.Applications:• Field sales people, repeat customers, etc.DIRECTORY NUMBERDescription:Directory Number (DN) allows extension numbers to be used on a key basis. The same DN maybe assigned to multiple keys on the same telephone and to keys on other telephones. There aretwo types of DNs.• Primary Directory Number(PDN): A telephone’s extension number is assigned to akey on the same telephone. Up to three appearances of the PDN may be assigned tokeys on a key telephone.• Non-Primary Directory Number (NPDN): A DN is assigned to an FF key on anothertelephone. Up to three NPDN appearances of the same DN may be assigned to keyson a telephone.• Phantom Non-Primary Directory Number (PNPDN): PNPDNs are assigned to acard position that is not installed in the system. As a result, this enhancementexpands the NPDN system by allowing the user to assign multiple extensionnumbers to a single telephone without the need for additional hardware.A telephone may only have one PDN (on up to three keys) but may have multiple NPDNs with upto three appearances of any one NPDN.Benefits:• Maximum four extension incoming call can be handled.• A PNPDN can be assigned as a 2nd DN key to separate private calls from othertypes of calls.• Handling calls is easier because DN calls can be transferred by pressing one key.DISTINCTIVE RINGINGDescription:Individual exchange lines and stations can have their own unique ring pattern and frequency forincoming calls, to distinguish them from other lines or phones. If no distinctive ringing isassigned, the exchange line’s ring pattern will be heard.