When an alarm occurs in the Mercury modem, the modem will call the host computer.
After detecting the call-in, ACM will:
The detection of a call-in is a two-step process. After the call-in is detected, ACM must identify the Mercury device that initiated the call by sending a poll request. The modem connection must be maintained to complete these steps successfully. This requires the use of a Hang Up delay in the Modem setup for the port assigned to the Mercury devices. Just a few seconds should be sufficient.
A: To make ACM poll for items during a call-in, the option to ‘Perform a demand poll during a call-in’ must be enabled. This option is on the Configuration tab of the Mercury setup. B: To make ACM poll for historical data during a call-in, the option to ‘Retrieve historical data during a demand poll’ must be enabled. This option is on the Configuration tab of the Mercury Setup. C: To make a device accept the call-in, it must have the “Unsolicited messages from device” option checked on the Logging tab. |
To make ACM poll data during a call-in, create a dummy Mercury device to accept the initial call-in.
This dummy Mercury device will have to:
When an alarm occurs in the Mercury device, the device will call the host computer.
After detecting the call-in, ACM will:
The detection of a call-in is a two-step process. ACM will identify the Mercury device that initiated the call. The modem connection must be maintained to complete these steps successfully. This requires the use of a Hang Up delay in the Modem setup for the port assigned to the Mercury devices. Just a few seconds should be sufficient.
A: To make ACM poll for items during a call-in, the option to ‘Perform a demand poll during a call-in’ must be enabled. This option is on the Device page of the Mercury setup. B: To make ACM poll for historical data during a call-in, the option to ‘Retrieve historical data during a demand poll’ must be enabled. This option is on the Options page of the Mercury Setup. |