ZyXEL Elite 2864 User Guide - Page 103

Code Bits (3) (2,1) (0) Bin. Dec. Description 0 0 CD tracks the carrier. (Default) 1 8 The CD on/off sequence follows the UNIX standard. CD is turned ON before the connection message is sent and CD is turned OFF after the last DCE response is sent. (A UNIX system needs CD ON to enable serial port receiving.) (See &C1, S21b4.) Reserved. 1 1 Enables repeat dialing of the default number if not connected. (See also *Dn, S29) S39 Bit-mapped register, default: 32: Code Bits (7,6) (5) (4) (3) (2) (1, 0) Bin. Dec. Description Reserved. 1 32 Disables scrambler/descrambler in V.26bis mode. Enables compatibility with older V.26bis modems which have no such unit. 1 16 Class 2 fax with DTE speed shifting; +FCON at current DTE rate; next phase at 19200. 1 8 Class 2 fax with Bitfax compatibility; +FCON at 2400 and shift to 19200 at next phase. 1 4 Reverses the answer; the modem answers in originate mode. Reserved. S40 Bit-mapped register, default: 0: Code Bits (7) (6) (5) (4) (3) (2) Bin. Dec. Description Reserved. 1 64 Enables type 4 ring detection. 1 32 Enables type 3 ring detection. 1 16 Enables type 2 ring detection. 1 8 Enables type 1 ring detection. 1 4 Enables caller ID detection. (See S24b2, *T) 8-17