Appeal No. 1999-1612
Application 08/614,188
single frequency that is in a common portion of the voice
band, the standard Call Waiting tone can probably be
easily simulated by voice or noise. Therefore a CPE
designed to disable its transmitter upon receipt of this
tone might inadvertently deactivate the transmission path
when handling normal speech.”
The reader is then directed to TR-TSY-000030 for further
details. We find that Bellcore in this 1986 document5
recommended that caller identification data be transmitted to
a busy called station during a silent interval of the call
waiting cycle but also found a problem with technology
existing at that time. The skilled artisan is not told how to
modify the alerting
tone of standard call waiting so that voice or noise of normal
speech would not be confused with it. Therefore, no solution
to this problem is provided.
Bellcore’s TR-TSY-000031, Issue 2, dated June 1988,
replaced the 1986 version discussed above. Page 1, section
1.3, second paragraph; page 3, section 3.1.1.2., first
5The current version of TR-TSY-000030 on record is dated
1988 and thus could not be the document to which the 1986
version of TR-TSY-000031 refers the reader. The 1988 version
of TR-TSY-000030 replaces a 1984 version of that document.
However, the 1984 version is unavailable.
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