The Telecommunications Industry Association, TIA, is a forum
for manufactures, service providers, suppliers, and end-users to
develop standards that guide the Telecommunications industry.
Accredited by the American National Standards Institute,
,
TIA provides voluntary industry standards on telecommunications
equipment.
The TIA Standards and Technology department is composed of
five divisions, which are:
Fiber Optics
User Premises Equipment
Network equipment
Wireless Communications
Satellite Communications
All of the various divisions are composed of committees and
the larger committees may also be composed of various
subcommittees.
It is within the TR41.3 committee of the User Premises
Equipment division that the standards for Analog and Digital
Wireline telephones are developed. TR41.3 is currently composed
of the following five subcommittees:
User Premises Equipment (UPED)
TR-41.3 Analog and Digital Wireline Telephones
TR-41.3.1 Caller ID Working Group
TR-41.3.2 Stutter Dial Tone Working Group
TR-41.3.3 VoIP/PCM Transmission Performance Working Group
TR-41.3.4 VoIP Terminals Working Group
TR-41.3.5 Analog Terminals Working Group
Specifically it is the subcommittee TR41.3.1 which is working
to provide the industry with a comprehensive set of
specifications for any device attached to the telephone line
that is designed to receive Caller ID.
What Standards do they publish on Caller ID?
TIA currently has two documents that can be used as a
guideline for a device that is capable of receiving Caller ID.
The first standard is EIA/TIA-716 (1998) Telecommunications
Telephone Terminal Equipment – Type 1 Caller Identity
Equipment Performance Requirements. This document outlines the
requirements for any device that will receive FSK data from the
central office while it is in the "on hook" state.
This includes data sent between the first and second power
ringing cycles as well as data that is sent without any ringing
signal. The physical layer and the data layer of the interface
are described including a recommended test matrix to verify the
operation of the device under a variety of conditions.
The second standard is EIA/TIA-777(1999) Telecommunications
Telephone Terminal Equipment – Type 2 Caller Identity
Equipment Performance Requirements. This standard outlines the
requirements for any device that is designed to receive Caller
ID on Call Waiting. In order to support this service the
equipment is designed to receive the data in the off hook state.
It is the intention of the standard that any device should meet
all of the requirements for EIA/TIA-716 in addition to the
requirements of EIA/TIA-777 to be classified as a type 2 device.
An important addition to this document, which is not included
in any previous standards, is the requirement for the equipment
to support Multiple Extension Interworking or MEI functionality.
This allows the type 2 device to receive the FSK data correctly
even when more that one device is off hook. This standard also
describes a method of allowing multiple devices to ‘Flash’
the line at the same time to support the advanced feature set
available from the service provider.
These documents may be purchased from calling Global
Engineering Documents at 1-800-854-7179 or visiting www.global.his.com.
New Standards and related Working Groups
TR-41.3.1 Caller ID Working Group
The TIA working group on Caller ID is currently developing
an extension of the two existing documents. Although this
document has not yet been assigned a document number it is
being worked on under the project number PN4603. This new
standard will merge the content in EIA/TIA-716 and EIA/TIA-777
into a single document, providing a more comprehensive and
single source for the information. In addition to merging the
documents some clarifications and enhancements will be
incorporated including a new section on Call Waiting Deluxe
CWD. CWD allows the user a choice of treatment options when
they receive a type 2 transmission. These options include:
Answer
Hold
Forward
Drop
Conference
Announcement
TR-41.3.2 Stutter Dial Tone Working Group
This group has been working to produce a standard for any
device that includes Stutter Dial tone detection. The
specification clarifies the FCC waiver stipulations and
defines the criteria for meeting those stipulations. The
events that trigger a stutter dial tone check as well as the
interaction between stutter dial tone and VMWI will be
addressed. This document which is currently under the project
number PN-4159 is nearing completion and should be published
shortly.
TR-41.3.5 Analog Terminals Working Group
This working group is in the starting phase of revising the
existing document EIA/TIA-470B. The new document when it is
released will be called EIA/TIA-470C and will include new
sections that will cover:
Multi-line telephones
Telephone operation with a parallel set
Headset Performance
Reduction of the variations in test circuits
Specifications on Sidetone delay
Adopt SLR,RLR,STMR <P.79> measurement calculations
This revision is a large undertaking and the new document
will take on a tiered format. The main document will include
all the basic performance requirements and the sub documents
will include performance requirements that may no be present
in all telephones. (ie speakerphone, cordless range, answering
machine, etc.)
For more information on TIA Standards and the working groups
a good source of information is www.tiaonline.org
