Download TR41.1.1-05-08-004-HP-Ring-Voltage

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;