TRENDnet TFM-560PCI Manual - Page 31

A2.2.6.2 +ITF, Transmit Flow Control Thresholds

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I101 V.90 PCI MODEM USER'S MANUAL Decimal number which specifies the bit sequence transmitted by the modem when a transmit data buffer underrun condition occurs immediately after a flag, while operating in Framed sub-Mode. The options are: 0 In Framed sub-Mode, modem transmits HDLC flags on idle (default and fixed). Decimal number which specifies the actions undertaken by the modem when a transmit data buffer underrun or overrun condition occurs immediately after a non-flag octet, while operating in Framed sub-Mode. 0 In Framed sub-Mode, modem transmits abort on underrun in middle of frame. (Default.) 1 In Framed sub-Mode, modem transmits a flag on underrun in middle of frame, and notifies DTE of underrun or overrun. Decimal number which specifies whether or not, in V.34 half-duplex operation, additional procedures besides those specified in § 12/V.34 will be performed by the modem when switching from primary channel to secondary channel operation, and vice versa. This subparameter should not be com manded. Decimal number which specifies the CRC polynomial used while operating in Framed sub-Mode. The options are: 0 CRC generation and checking disabled. (Default and fixed.) Decimal number which specifies if Non Return to Zero Inverted (NRZI) encoding is to be used by the modem for transmit and receive data. The options are: 0 NZRI encoding and decoding disabled (default and fixed). , Decimal number which specifies the octet value(s) to be used while performing characteroriented framing. is to be commanded to 255 (FFh); is not to be commanded. Reporting Current or Selected Values Command: +ESA? Response: ESA: ,,,,,,, Reporting Supported Range of Parameter Values Command: +ESA=? Response: +ESA: ( range), ( range),( range), ( range), ( range), ( range),( range), ( range) A2.2.6.2 +ITF=[[,[,]]] - Transmit Flow Control Thresholds In V.80 Synchronous Access Mode, this optional compound parameter allows the DTE to determine the effective input buffer size in the modem for data on transmit data from the DTE, to control the thresholds used for flow control of such data, and to control how often the modem reports to the DTE the number of octets in this buffer. Note that the DTE can adjust its own thresholds for flow control of data on received data from the modem. P.31 44

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I101 V.90 PCI MODEM USER'S MANUAL
44
P.31
<framed_idle> Decimal number which specifies the bit sequence transmitted by the modem when a transmit data
buffer underrun condition occurs immediately after a flag, while operating in Framed sub-Mode. The
options are:
0
In Framed sub-Mode, modem transmits HDLC flags on idle (default and fixed).
<framed_un_ov> Decimal number which specifies the actions undertaken by the modem when a transmit data
buffer underrun or overrun condition occurs immediately after a non-flag octet, while operating in
Framed sub-Mode.
0 In Framed sub-Mode, modem transmits abort on underrun in middle of frame. (Default.)
1 In Framed sub-Mode, modem transmits a flag on underrun in middle of frame, and notifies DTE of
underrun or overrun.
<hd_auto> Decimal number which specifies whether or not, in V.34 half-duplex operation, additional procedures
besides those specified in ยง 12/V.34 will be performed by the modem when switching from primary
channel to secondary channel operation, and vice versa. This subparameter should not be com
manded.
<crc_type> Decimal number which specifies the CRC polynomial used while operating in Framed sub-Mode.
The options are:
0 CRC generation and checking disabled. (Default and fixed.)
<nrzi_en> Decimal number which specifies if Non Return to Zero Inverted (NRZI) encoding is to be used by the
modem for transmit and receive data. The options are:
0 NZRI encoding and decoding disabled (default and fixed).
<syn1>, <syn2> Decimal number which specifies the octet value(s) to be used while performing character-
oriented framing. <syn1> is to be commanded to 255 (FFh); <syn2> is not to be commanded.
Reporting Current or Selected Values
Command: +ESA?
Response: ESA: <trans_idle>,<framed_idle>,<framed_un_ov>,<hd_auto>,<crc_type>,<nrzi_en>,<syn1>,<syn2>
Reporting Supported Range of Parameter Values
Command: +ESA=?
Response: +ESA: (<trans_idle> range), (<framed_idle> range),(<framed_un_ov> range), (<hd_auto> range),
(<crc_type> range), (<nrzi_en> range),(<syn1> range), (<syn2> range)
A2.2.6.2 +ITF
=[<off>[,<on>[,<report_period>]]]
- Transmit Flow Control Thresholds
In V.80 Synchronous Access Mode, this optional compound parameter allows the DTE to determine the effective
input buffer size in the modem for data on transmit data from the DTE, to control the thresholds used for flow control of
such data, and to control how often the modem reports to the DTE the number of octets in this buffer. Note that the DTE
can adjust its own thresholds for flow control of data on received data from the modem.