Maxim Integrated 73M2901CE AT Command - Manual (Page 51)

UG_2901CE_027 73M2901CE AT Command User Guide
Rev. 2.0 51
4.4.118 S121 – Answer Tone Qualify Time
(Default = 0)
The value of this register extends the answer tone qualification time beyond the 155ms minimum in 10ms
units. For example a value of 10 would yield a total answer tone qualification time of 255ms (100ms +
155ms).
4.4.119 S122 – Parallel Pick Up Debounce Timer
(Default = 0)
Sets the duration of the parallel pick debounce timer in 10ms increments.
4.4.120 S123 – Soft Ring Detect
(Default = 0)
This register controls the ring amplitude threshold and selects hardware or software ring detection.
Bit Map:
Bits 0-6
Ring Amplitude Detection Threshold. Lower value detects lower amplitude ring signal.
Bit 7 1 = No frequency checking, enables Phonex operation.
0 = Frequency and amplitude checking, normal operation.
Special Values:
S123 = 0
Disable soft ring detect, use hardware ring.
S123 = 255 Auto detect phonex mode, the modem will automatically detect an user phonex system
and configure itself accordingly.
S123 = 1-127 Force soft ring detection with frequency qualification for non-phonex operation.
Recommend value of 7 (or 2 for very Low Amplitude and Frequency detection).
S123 = 128-254 Force soft ring detection with no frequency qualification for phonex operation.
Recommend value of 170.
4.4.121 S124 – V23 Half Duplex Enable
(Default = 0)
Bit 0
Selects V.23, 1200 bps Half Duplex mode.
Bit 1-7 Reserved
5 Related Documentation
The following 73M2901CE documents are available from Teridian Semiconductor Corporation:
73M2901CE Data Sheet
73M2901CE Demo Board User Manual
6 Contact Information
For more information about Teridian Semiconductor products or to check the availability of the
73M2901CE, contact us at:
6440 Oak Canyon Road
Suite 100
Irvine, CA 92618-5201
Telephone: (714) 508-8800
FAX: (714) 508-8878
Email: [email protected]
For a complete list of worldwide sales offices, go to http://www.teridian.com.