Titan Electronics Inc NETCOM423 Manuel D’Utilisation
Page
89
NetCom 123 WLAN, 423 WLAN,
8.1.3. O
PERATION
M
ODES BY
IP M
ODEM
The function of IP-Modem may be configured port by port. On a
NetCom with a single port there is no much of a difference. However a
NetCom with two or more serial ports operates each port independently.
In the following sections of this manual the phrase “serial port of a
NetCom, configured to operate as IP
NetCom with a single port there is no much of a difference. However a
NetCom with two or more serial ports operates each port independently.
In the following sections of this manual the phrase “serial port of a
NetCom, configured to operate as IP
Modem” is replaced by
“IP Modem” for brevity.
Two basic operation modes are available. The first and default mode is
Modem-to-Modem. This requires a serial port of a NetCom configured
as IP Modem on both ends of the connection. When one IP Modem
dials the other, the connection is established on the TCP level. Directly
afterwards both IP Modems negotiate to ensure, they are a real NetCom
IP Modem and are free for connection. If successful both issue a
“CONNECT …” response to the serial connected devices. This is
convenient for the customer to understand. The CONNECT may report
some parameters, e.g. the minimum serial speed used by both Modems.
These extra parameters are not implemented so far.
The other mode is named as Modem-to-Host. The destination is any
software, which opens a TCP port for Listen. It may be a second
NetCom configured for TCP Raw Server Mode. It may also be the
customers application, running on a certain computer. This mode offers
less features.
Two basic operation modes are available. The first and default mode is
Modem-to-Modem. This requires a serial port of a NetCom configured
as IP Modem on both ends of the connection. When one IP Modem
dials the other, the connection is established on the TCP level. Directly
afterwards both IP Modems negotiate to ensure, they are a real NetCom
IP Modem and are free for connection. If successful both issue a
“CONNECT …” response to the serial connected devices. This is
convenient for the customer to understand. The CONNECT may report
some parameters, e.g. the minimum serial speed used by both Modems.
These extra parameters are not implemented so far.
The other mode is named as Modem-to-Host. The destination is any
software, which opens a TCP port for Listen. It may be a second
NetCom configured for TCP Raw Server Mode. It may also be the
customers application, running on a certain computer. This mode offers
less features.
8.1.4. H
AYES COMMANDS
The IP Modem operates with a command set similar to those in real
Modems. All of the commands start with the character sequence
Modems. All of the commands start with the character sequence
ΑΤ.
8.1.4.1.
AT command set
The following table lists many standard commands (in alphabetical
order). The AT is omitted for brevity. The discussion of the functions is
below the tables in section 8.1.5 below.
order). The AT is omitted for brevity. The discussion of the functions is
below the tables in section 8.1.5 below.