Product data

USRobotics
Command Reference
Data Command Set - 66
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 § 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 commanded.
<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>
Example: +ESA: 0,0,0,,0,0,255, For the defaults.
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)
Example: +ESA: (0),(0),(0-1), ,(0),(0),(255)