Advanced Comms - Walchem WebMaster ONE Instruction Manual

6.47

Advanced Comms

Internet Dialup (only appears if PSTN modem is installed)
Wait for dial tone before dialing
Click to place a check in the box if you want the modem to wait for a dial tone before calling out.
In some countries the dial tone may not be recognized. If the modem will not recognize the dial
tone, uncheck the box.
Modem Baud Rate
Click on the arrow of the pull-down to select different modem baud rates. The WebMaster modem
is 38400. Normally there will be no reason to change the baud rate. The baud rate may be reduced
if the process monitor is having problems at the higher speed due to poor phone line conditions. In
the future, external modems may be supported that may not have the same baud rate.
Controller Telco Location
Click on the arrow of the pull-down to select the country where the process monitor is located.
Cellular Modem (only appears if cellular modem is installed)
Modem Initialization String
Type in the text box the modem initialization string required for your cell service. It will be in the
format AT+CGDCONT=1,"IP","APN" where APN is the Access Point Name provided by the cell
service provider.
SIM Card Number
For information only. The number is read from the SIM card.
Modem Type
Select between North America and Outside North America to specify the band of the cell modem.
Modem Band
Display the band of the modem.
Modem Baud Rate
Click on the arrow of the pull-down to select different modem baud rates. The baud rate will be
negotiated at power-up. Normally there will be no reason to change the baud rate. The baud rate
may be reduced if there are problems at the higher speed due to poor signal conditions.
Maximum PPP MTU Size
Normally the PPP MTU packet size will be negotiated with the cell service. Some services require
a manual setting of a smaller size. Type this in the text box if necessary.
Network Settings
Primary and Secondary DNS IP Address
These text boxes contain the address of a valid Domain Name Server, which allows the WebAlert
to send the emails using the name of the email server rather than the numeric SMTP IP address.
The DNS IP addresses should never need to be changed, unless the server is experiencing
problems.
Ethernet MAC Address
This field displays the MAC address of the Ethernet circuit, in case it is needed by the network IT
administrator to identify the controller.
145