![US Robotics USR3520 User Manual Download Page 61](http://html1.mh-extra.com/html/us-robotics/usr3520/usr3520_user-manual_1063482061.webp)
Modemulator User Guide
Page
61
of
113
S1
Ring Count
S1 is read-only. The I4 command will display the number of RINGs received so far in the S1
register.
S2 * ASCII Code for Escape Character (default=43, 0x2B=+)
This is the programmable character used for the escape sequence. The default character for the
escape sequence to terminate a data connection is '+' (ASCII code decimal 43).
Issuing
+++
during a data connection will cause the Modemulator to disconnect a cellular
connection, and return to AT command mode.
If connected using the attached analog modem, it may enter local online command mode
(depending on configuration). Issue ATH to disconnect.
S7 * NO ANSWER Timeout (default=60 seconds)
In analog calls, if the remote modem doesn't answer within this many seconds, the local
Modemulator will report
NO CARRIER
.
In cellular calls:
If no RINGBACKs were received within half of this time, then the local Modemulator will report
BUSY
.
If at least one RINGBACK has been received, the local Modemulator will report
NO ANSWER
when
S7 expires.
S7 will also control the connection attempt timeout in answer mode.
S8 * Comma Delay (default=2 seconds)
Each comma in the dial string will cause an extra delay before the
CONNECT
message is displayed
(for applications that may require it).
S19 * Inactivity Timeout (minutes, default=0, disabled)
If no characters are sent or received for this many minutes, the local and remote Modemulator will
disconnect and report
NO CARRIER
.
The Disconnect Reason will be
INACTIVITY TIMEOUT
.
S21 * Break Length (default=10, which is 100 ms)
Controls the length of the break signal (in 10 ms increments) generated and sent to the local DTE
when a break token is received from the remote Modemulator. Set S21=0 to disable generation of
break signals.