85
6620-3201
Link retries:
The router will normally make multiple attempts to connect to the GPRS network in the event that the
signal is lost. In some cases, this can result in a “lock-up” situation where the GSM network is unable
to attach the GPRS device due to the multiple attempts. The
Link retries
parameter speci
fi
es the
number of attempts at connection that the unit should make before power cycling the internal GPRS
module. Power cycling the GPRS module forces it to re-register and reattach to the network. The
default setting of 10 is the recommended value. Setting this parameter to 0 will prevent the router
from power cycling the GPRS module if it cannot obtain an IP address.
Status retries:
The router will periodically collect status information from the internal GPRS module. This information,
which may be viewed on the
Status
>
GPRS module
web page, includes details of the signal
strength and network attachment status. As a safeguard against problems communicating with the
GPRS module, the
Status retries
parameter may be used to specify the number of unsuccessful
attempts to retrieve status information from the GPRS module before power cycling it. The default
setting of 30 is the recommended value. Setting this parameter to 0 will prevent the router from power
cycling the GPRS module if it cannot read the GPRS status information.SMS message centre:
This is the number of the SMS message centre (sometimes referred to as the Service Centre
Address), to be used to relay SMS messages or alarms. This number must include the international
dialling code, e.g. 44 for the UK, but not the “+” pre
fi
x or leading 0’s, e.g. 44802000332. SMS alarms
are generated when the
SMS trigger priority
is greater than 0 and an event of this priority or higher
occurs. SMS messages may be edited and sent using the
Confi gure
>
SMS Edit
page.
If no number is speci
fi
ed it is possible that the unit will operate using the default message centre for
the GSM service to which you have subscribed.
SMS polling interval (mins):
This speci
fi
es the interval in minutes that the unit will wait in between checks for incoming SMS
messages. Setting this interval to 0 turns off checking.
SMS command caller ID:
This parameter speci
fi
es a number that is compared with the trailing digits of the SMS sender’s
phone number. If the numbers match, then the SMS text is treated as if it were a text command being
entered via one of the serial ports. If the parameter is left blank, SMS messages are logged in the
event log but are not treated as commands.
SMS command separator:
This parameter speci
fi
es the character to be used to separate multiple command lines when a remote
SMS sender is controlling the unit. The default separator is <CR><LF> but some SMS capable
devices are not equipped with <CR> and <LF> keys so an additional means of separating multiple
lines is required.
SMS access level:
The access level for SMS commands. The access level set here will need to match the level required
by the command sent by SMS for the command to be accepted.
SMS replies:
This parameter enables or disables replies to SMS commands.
SMS concatenation limit:
This parameter concatenates replies to SMS commands, thereby limiting the number of messages
sent. A value of 1 (default) means no concatenation. Zero means no limit, which at present means the
fi
rst 1500 bytes of a command response (i.e. 10 messages).
Enable Mux / Disable Mux:
The two buttons at the bottom of the page labelled
Enable Mux
and
Disable Mux
are used to enable or disable 0710 multiplex mode for the GPRS module. When this
mode is enabled (which it is by default), several additional parameters become effective on the
Confi gure
>
ISDN LAPB
page under the heading “Async Mux 0710 Parameters”. Refer to the
description of this page for further information.
