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TR41.1.1-05-08-004 DOCUMENT SUBMITTED TO: TR-41.1.1 Meeting The document to which this cover statement is attached is submitted to a Formulating Group or sub-element thereof of the Telecommunications Industry Association (TIA) in accordance with the provisions of Sections 6.4.1-6.4.6 inclusive of the TIA Engineering Manual dated March 2005, all of which provisions are hereby incorporated by reference. SOURCE: CONTACT: Hewlett Packard Bharat Singh Hewlett Packard 16399 West Bernanrdo Dr 8-90 San Diego, CA 92127 Telephone: 858-655-4891 Fax: 858-655-3961 Email: [email protected] TITLE: Modification to Ring Voltage requirement of TR41.1.1 draft document PROJECT NUMBER (PN): DISTRIBUTION: INTENDED PURPOSE OF DOCUMENT: TR 41.1 TIA TR41.1.1 __X_ ___ ___ FOR INCORPORATION INTO TIA PUBLICATION FOR INFORMATION OTHER (Please describe)__ ________________________ ABSTRACT: Battery Voltage changes have been proposed to be incorporated in the TR41.1.1 draft. Abstract It is proposed to change the minimum and maximum ring voltage requirement to cover the entire burst of ring On period of 600 or 800 ms as defined in section 5.1.4.3 Item 1 The ring on a analog phone is a straight function that uses the AC signal on tip/ring to generate sound to alert the user for an incoming call. More sophisticated equipment such as fax machines and possibly digital answering machines algorithmically qualify the frequency and cadence (ring ON and OFF period) to reliably detect the ring to auto start the fax functions. Thus, it is very important that all the cycles in the ring ON period shall have minimum 40V rms throughout the burst. Proposal Change section 5.1.4.1 (1) (2) To (3) (4) The magnitude of the ac component of the ringing signal into a load of 5 REN applied at the analog telephone port shall be greater than 40 V rms and should be greater than 55 V rms. For testing purposes, the impedance of a load of REN n should be a resistor of (6930/n) ohms in series with a capacitance of (8*n) µF; The magnitude of the ac component of the ringing signal into a load of 0 REN applied at the analog telephone port shall not exceed 106 V rms; The magnitude of the ac component of the ringing signal into a load of 5 REN applied at the analog telephone port shall be greater than 40 V rms and should be greater than 55 V rms for the entire ring burst ON period as specified in 5.1.4.3. For testing purposes, the impedance of a load of REN n should be a resistor of (6930/n) ohms in series with a capacitance of (8*n) µF; The magnitude of the ac component of the ringing signal into a load of 0 REN applied at the analog telephone port shall not exceed 106 V rms during any part of the ring burst On period;