Sutron Corporation X-Link Operations & Maintenance Manual, Rev 1.63 5/24/2016 pg. 95
7.2.1.6. Max Tx Time
The Max Tx Time setting dictates how long X-Link will continue to attempt to
make a transmission. The default value is 10 minutes. The goal of this setting is
to reduce power consumption when there is a transmission problem, such as no
network for cellular stations or no satellite view for Iridium stations.
This setting was introduced in version 1.57. Prior to that, X-Link would retry
from either 50% or 80% of the Tx Interval, depending on the X-Link model.
7.2.2. Cell Phone Settings
The following settings are used to set up GPRSLink, HSPALink, and CDMALink.
7.2.2.1. Tx Mode
If Tx Mode is set to Internet, X-Link will use the modem to get an internet
connection. Once the connection is established, X-Link will connect to the Main
Server in order to deliver data. Failing that, it will try the Backup Server.
If Tx Mode is set to SMS, X-Link will send transmission data via SMS (messages)
to up to three telephone numbers, as specified by SMS Tx Phone.
If Tx Mode is set to Internet Fallback SMS, and X-Link will first try to connect to
the Main Server. If that fails, it will try the Backup Server. If it cannot establish an
internet connection or if it cannot reach both servers, X-Link will deliver the
sensor data via SMS (text messages). The SMS will be sent to up to three
telephone numbers, as specified by SMS Tx Phone.
7.2.2.2. Main Server
When it is time to make a scheduled transmission, if Tx Mode is set to Internet or
Internet Fallback SMS, X-Link will connect to the destination specified by Main
Server. The server may be expressed as a name (such as www.sutronwin.com) or
an IP address (such as 10.0.0.1).
See the section called TCP/IP Session for details on the connection. (page 153)
7.2.2.3. Backup Server
If X-Link is unable to connect to the Main Server, but it does have an internet
connection, it will try to deliver data to the Backup Server.
7.2.2.4. Server Port
What TCP/IP port to connect to on the Main and Backup Servers.
7.2.2.5. Server Password
If the Main and Backup Servers are protected by a password (sometimes called a
shared secret), it must be entered in this field. If it is not, X-Link will not be able
to deliver sensor data.
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