Source: http://www.google.com/patents/US5903602?dq=%22virtual+interaction+configuration%22
Timestamp: 2017-01-17 18:09:19
Document Index: 792757342

Matched Legal Cases: ['§ 4', '§ 5', '§ 5', '§ 5', '§ 5', '§ 5', '§ 4', '§ 5', '§5', '§ 5', '§ 5', '§ 5', '§ 6', '§ 5', '§ 6', '§ 6']

After receiving the answer tone for a period of at least 1 s as specified in Recommendation V.25, the modem shall be connected to line (see Note 1 below) and shall condition the scrambler and descrambler in accordance with § 4.1.
The modem shall be conditioned to detect (see Note 2 below) one of two incoming tones at frequencies 600±7 Hz and 3000±Hz, and subsequently to detect a phase reversal in that tone.
On detection of one such phase reversal, the modem shall be conditioned to detect a second phase reversal in the same tone, start a counter/timer and change to repetitively transmitting state C as shown in FIG. 2-5/V.32 bis. The time delay between the reception of this phase reversal at the line terminals and the transmitted AA to CC transition appearing at the line terminals shall be 64±2 symbol periods.
When the modem detects an incoming S sequence (see § 5.2), it shall proceed to train its receiver, and then seek to detect at least two consecutive identical 16-bit rate sequences as defined in Table 5/V.32 bis.
After this period has expired (see Note 3 below), the modem shall transmit the receiver conditioning signal as defined in § 5.2, starting with an S sequence for 256 symbol intervals.
After the TRN segment, the modem shall apply ON condition to circuit 107 and transmit a rate signal (R2) in accordance with § 5.3 to indicate the currently available data rates. R2 shall exclude rates not appearing in the previously received rate signal R1. It is recommended that R2 take also account of the likely receiver performance with the particular GSTN connection. It appears that satisfactory performance cannot be attained at any of the available data rates, then R2 should be used to call for a GSTN cleardown in accordance with Table 5/V.32 bis.
Transmission of R2 shall continue until an incoming rate signal R3 is detected. The modem shall then, after completing its current 16-bit rate sequence, transmit a single 16-bit sequence E in accordance with § 5.3.2 indicating the data rate called for in R3. If, however, R3 is calling for GSTN cleardown in accordance with Table 5/V.32 bis, then the call modem shall disconnect from time and effect a cleardown.
On detecting an incoming 16-bit E sequence as defined in § 5.3.2, the modem shall condition itself to receive data at the rate indicated by the incoming E sequence. After a delay of 128 symbol intervals, it shall apply an ON condition to circuit 109, and unclamp circuit 104.
On connection to line, the modem shall condition the scrambler and descrambler in accordance with § 4.1, and transmit the Recommendation V.25 answer sequence. Means, defined in Recommendation V.25 of disabling network cancellers and/or truncating the answer tone may be employed.
After alternate states A and C have been transmitted for an even number of symbol intervals greater than or equal to 128 and an incoming tone has been detected at 1800±7 Hz for 64 symbol periods (see Note 5 below), the modem shall be conditioned to detect a phase reversal in the incoming tone, start a counter/timer, and change to transmitting alternate carrier states C and A for an even number of symbol intervals.
On detecting a phase reversal in the incoming tone, the modem shall stop the counter/timer and, after transmitting a state A, revert to transmitting alternate states A and C. The time delay between the reception of this phase reversal at the line terminals and the transmitted CA to AC transition appearing at the line terminals shall be 64±2 symbol periods.
When an amplitude drop is detected in the incoming tone, the modem shall cease transmitting for a period of 16 symbol intervals and then (see Note 3 below) transmit the receiver conditioning signal as defined in § 5.2.
After the TRN segment, the modem shall transmit a rate signal (R1) in accordance with §5.3 to indicate the data rates currently available in the answer modem and associated DTE.
After training its receiver, the modem shall seek to detect at least two consecutive identical incoming 16-bit rate sequences as defined in § 5.3.
On detection of a rate signal (R2), the modem shall apply ON condition to circuit 107 and transmit a second receiver conditioning signal as defined in § 5.2.
When the modem detects an incoming 16-bit E sequence as defined in § 5.3.2, it shall condition itself to receive data at the rate indicated by the E sequence.
Notes to § 6
Note 1--Once an incoming tone is detected at 600±7 Hz or 3000±7 Hz, the calling modem may proceed with the start-up sequence even if no 2100 Hz tone has been detected.
Note 3--The TRN segment in the receiver conditioning signal is suitable for training the echo canceller in the transmitting modem. Alternatively, it is acceptable to proceed the receiver conditioning signal by A sequence which can be used specially for training the echo canceller, but which need not be defined in detail in the Recommendation. The echo cancellation sequence (if used) must maintain energy transmitted to line to hold network echo control devices disabled (as required). In order to avoid confusion with Segments 1 or 2 of the receiver conditioning signal defined in § 5.2, the echo cancellation sequence shall produce a transmitted signal such that the sum of its power in the three 200 Hz bands centered at 600 Hz, 1800 Hz and 3000 Hz is at least 1 dB less than its power in the remaining bandwidth. This applies for the relative power averaged over any 6 ms time interval. The duration of this signal must not exceed 8192 symbol intervals.
Note 5--The answering modem may disconnect from the line if the 1800±7 Hz tone is not detected following transmission of the segment AC. However, to assure compatibility with manual originating data stations, it shall not disconnect for at least 3 seconds after the segment AC has been transmitted.
Following detection of unsatisfactory signal reception or detection of one of two tones at frequencies 600±7 Hz and 3000±7 Hz for more than 128 symbol intervals, the modem shall turn OFF circuit 106 clamp circuit 104 to binary one and repetitively transmit carrier state A as shown in FIG. 2-5/V.32 bis. It shall then proceed in accordance with § 6.1 beginning with the third paragraph.
Following decision of unsatisfactory signal reception or detection of a tone of frequency 1800±7 Hz for more than 128 symbol intervals the modem shall turn OFF circuit 106, clamp circuit 104 to binary one and transmit alternate carrier states A and C for an even number of symbol intervals not less than 128. It shall then proceed in accordance with § 6.2 beginning with the third paragraph.
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ClassificationH04M11/06European ClassificationH04M11/06Legal EventsDateCodeEventDescriptionMay 23, 1996ASAssignmentOwner name: NOKIA TELECOMMUNICATIONS OY, FINLANDFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:TORKKEL, JARI;REEL/FRAME:008151/0665Effective date: 19960220Sep 19, 2002FPAYFee paymentYear of fee payment: 4Oct 20, 2006FPAYFee paymentYear of fee payment: 8Dec 13, 2010REMIMaintenance fee reminder mailedMar 10, 2011FPAYFee paymentYear of fee payment: 12Mar 10, 2011SULPSurcharge for late paymentYear of fee payment: 11RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services