* AT command definitions

&E0-9	Set outgoing EAZ/MSN register
&E0-9=	Set definition for outgoing EAZ/MSN register
&E*	Set magic EAZ/MSN ( ! Only for incomming calls ! )
&Ex	Set no OAD mode
&E?	Display actual EAZ/MSN settings

&F	Set factory settings
&FS	Set max valid frame size
&D0-1	Set DTR mode
&W	Save unit parameters
&V	Display current settings

Z	Set last saved settings

Ex	Set ECHO mode
Vx	Set VERBAL mode
Qx	Set QUIET mode

&XA=	Set x.75A address
&XB=	Set x.75B address

BOxx	Set outgoing B channel protocoll
BIxx	Set incoming B channel protocoll

  00=	X.75
  10=	T.70/BTX
  20=	T.90
  30=	V.110
  40=	V.120	(DO NOT USE)
  50=	RAW HDLC (DO NOT USE)
  60=	(DO NOT USE)
  70=	PPP sync-to-async (DO NOT USE)
  80=	(DO NOT USE)
  90=	AUTOMATIC DETECKT

* S register definitions

S00	Ring counter
S01	Hangup timer
S02	ESC code
S03	CR code 13
S04	LF code 10
S05	Backspace code
S06	X mode
S07	Bittmap register
  0	DTR option
  1	Date/Clock option
  2	Echo indicator
  3	Verbal indicator
  4	Quit indicator
  5	Autoanswer indicator
  6	BUSY indicator
 
S08	x.75A
S09	x.75B
S10-11	AT&FS= value of max frame size 
S12	1TR6 Service Indicator
S13	1TR6 Additional Info byte
S20	Outgoing Service Protocoll select
S21	Outgoing Service Sub Protocoll select
S22	Incoming Service Protocoll select
S23	Incoming Service Sub Protocoll select

S127	Select outgoing unit EAZ/MSN