ZyXEL Communications U-1496 series - Page 49

S39 Bit-mapped register, default = 000
(7) =0; Does not include resync information in recorded voice data.
=1; Includes resync information in recorded ADPCM file.
Note: When the resync function is enabled, the modem sends a resync symbol -
<DLE><DC2>(hex 10 and 12) every 50 ms. ADPCM data can be edited without losing sync if
enabled.
(6) =0; DTMF detection is enabled only in voice PLAY or RECORD
mode.
=1; DTMF detection is enabled when command "AT+VLS=2" is
received.
Note: AT auto baud detection is disabled when DTMF detection is enabled.
(5) =1; Disables scrambler/descrambler in V.26bis mode. Enables
compatibility with older modems which have no V.25bis scrambler/descrambler unit.
(4) =1; Class 2 fax with DTE speed shifting; +FCON at current DTE rate
and shift to 19200 at next phase
(3) =1; Class 2 fax with Bitfax compatibility; +FCON at 2400 and shift to
19200 at next phase.
(2) =1; Reverse Answer; answer in originate mode.
(1,0) Reserved.
S40 Bit-mapped register, default = 000
(7) Reserved.
(6) =1; Enable type 4 ring detection.
(5) =1; Enable type 3 ring detection.
(4) =1; Enable type 2 ring detection.
(3) =1; Enable type 1 ring detection.
(2) =1; Enable caller ID detection. (See also S24b2, *T)
Q2 (1) =1; ATQ2, modem does not return result code in answering. No
RING or CONNECT message.
(0) Reserved.
Note: Bits (6,5,4,3) enable ring detection on a combination of four ring types. All 0's enable ring
detection on any ring longer than 100ms.
S41 Bit-mapped register, default = 000
(7) =1; Ignore calling tone. Not to be used as fax detection.
(6) =1; Do not answer on the first ring, force S0=2.
(5) =1; DSR follows DCD, off for 0.5 sec on DCD on-off transition. (See
&Sn).
(4) =1; In X2-X7 setting, modem waits for S6 seconds before dialing
and ignores dial tone detection.
(3) =1; Enable CCITT signals 140 and 141 on EIA-232D interface.
(2) =1; Extend the retrain time-out timer to 5 minutes. (See *Qn,
S27b6).
(1) =0; Flag idle in V.25bis HDLC. (See *I1, S17b6)
=1; Mark idle in V.25bis HDLC.
(0) =1; Special MNP compatibility (See also &Kn, S27b0, S38b5).
S42 Bit-mapped register, default = 000
(7) =1; DCD pulses off for 0.5 sec at carrier loss, always on otherwise.