Operation; Configuration Profiles And S-Registers; Configuration Profiles - Thermo Scientific V.22/212A User Manual

3.0 OPERATION

This section provides descriptions and procedures for the configuration and operation of the
V.22/212A Modem Card. It is assumed that the operator is familiar with the basic operation of an
IBM compatible personal computer and a telecommunication software package that utilizes AT
Commands, such as ProComm
When power is applied, the V.22/212A modem card is initialized to a set of configuration
parameters stored internal to the modem chip-set or the non-volatile memory (NVMEM) on the
board. This configuration data is written to the volatile memory (RAM) and becomes the current
configuration parameters (Active Profile).
The manufacturer stores configuration parameters in the modem chip-set. This configuration set is
referred as the Factory Profile and cannot be changed. Two additional configuration sets can be
stored in the board's NVMEM (identified as Stored Profiles 0 and 1). During production tests of the
units, parameters are stored in both Stored Profiles. The modem initializes using the Stored Profile
0, if present. If not, the modem defaults to the Factory Profile.
Using AT commands, the operator can modify the Active Profile to meet specific communication
needs and store it in NVMEM as Stored Profile 0 or 1. The Active Profile can be reset to any of the
stored sets. Because the Active Profile is in volatile memory, it is lost if modem power is removed,
or if the modem goes into standby mode.

3.1 CONFIGURATION PROFILES AND S-REGISTERS

3.1.1 Configuration Profiles

The configuration parameters in the Current and Stored Profiles 0 and 1 can be viewed using the
AT&V command. To view the Factory Profile, it must first be written to the Current Profile using
the AT&F command, then viewed as the Current Profile using AT&V. The configuration parameters
are displayed in an AT Command format and includes values of the S-Registers. The Factory
Profile is set as: B1 E1 L2 M1 Q0 V1 X4 Y0 &C0 &D0 &G0 &J0 &L0 &P0 &Q0 &R0 &S0 &X0
&Y0. Factory Stored Profiles 0 and 1 are set as: B1 E0 L2 M1 Q0 V0 X0 Y0 &C1 &D0 &G0 &J0
&L0 &P0 &Q0 &R0 &S0 &X0.
Because AT Commands are used to modify the profile set, refer to the AT Commands to determine
the value of the profile. The Factory Stored Profiles are interpreted as follows:
C
B1: sets modem in Bell 212A operation mode
C
E0: disables the character echo in command mode
C
L2: speaker volume set to medium level
C
M1: speaker on during connect only
C
Q0: modem returns result codes
C
V0: display result codes in numeric form (as numbers)
C
X0: enables features presented by result codes 0-4
C
Y0: disable long space disconnect
TM TM
or CrossTalk .
13