B&B Electronics VFG3000 - Manual - Manual (Page 45)

A DVANCED C OMMUNICATIONS U SING E LECTRONIC M AIL
R EVISION 1 P AGE 29
useful when debugging SMTP operations, but it will tend to degrade
performance slightly.
• The Initial Timeout property is used to specify how long the mail client will wait
for the SMTP server to sent its welcome banner. Some Microsoft servers attempt
to negotiate Microsoft-specific authentication with mail clients, thereby delaying
the point at which the banner appears. You may want to extend this time period
to 2 minutes or more when working with such servers.
C ONFIGURING SMS
The SMS tab is used to configure the Short Messaging Service. This transport is used to send
text messages to cell phones via a GSM modem. Email addresses for SMS comprise an
international format telephone number, minus the introductory plus-sign. An example address
in the United States would be 17175551234, while an example in the UK would be
441246555555. In each case, the address comprises the country code, followed by the area
code and the subscriber number.
The configuration options for SMS are shown below…
• The Transport Mode property is used to enable or disable the transport. Note that
the mail manager must be enabled via the General tab before the SMS transport
can be enabled. Note also that either SMTP or SMS must be enabled if the mail
manager is to be able to deliver messages.
• The Message Relay property is used to enable or disable the Gateway’s SMS
relay feature. If this feature is enabled, a user who receives an SMS message that
has been sent to several recipients can reply to that message, and have the
Fieldbus Gateway relay the message to the other recipients. This provides a
simple conferencing facility between message recipients.
Note that for the SMS transport to operate, a GSM modem must have been installed on one of
the unit’s serial ports. Refer to later sections of this chapter for details on how to configure
such a modem, and on multiple modems will interact.