Difference between revisions of "ESPA 4.4.4"
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'''ESPA 4.4.4''' is a protocol controlling wireless pagers. It uses ISO 1745, point-to-point on RS232 as data link layer. The AlphaCom can use this in two ways: | '''ESPA 4.4.4''' is a protocol controlling wireless pagers. It uses ISO 1745, point-to-point on RS232 as data link layer. The AlphaCom can use this in two ways: | ||
| − | * Output: Sends a “start paging” message to a | + | * Output: Sends a “start paging” message to a wireless pocket pager transmitter either due to manual or automatic action. |
* Input: The AlphaCom can be set up to look like a pager transmitter. The AlphaCom inspects the display text and generates events to the Event Handler which do a range of actions. (“Fire Alarm protocol”). | * Input: The AlphaCom can be set up to look like a pager transmitter. The AlphaCom inspects the display text and generates events to the Event Handler which do a range of actions. (“Fire Alarm protocol”). | ||
Revision as of 11:32, 21 May 2010
ESPA 4.4.4 is a protocol controlling wireless pagers. It uses ISO 1745, point-to-point on RS232 as data link layer. The AlphaCom can use this in two ways:
- Output: Sends a “start paging” message to a wireless pocket pager transmitter either due to manual or automatic action.
- Input: The AlphaCom can be set up to look like a pager transmitter. The AlphaCom inspects the display text and generates events to the Event Handler which do a range of actions. (“Fire Alarm protocol”).
Message example
Typical example of a ESPA 4.4.4 message which AlphaCom will send to a paging system (checksum not show):
SOH 1 STX 1 US 550 RS 2 US CALL ME 101 RS 3 US 3 RS 4 US 3 RS 5 US 3 RS 6 US 3 ETX
Same message, written as hex-values:
01 31 02 20 31 1F 35 35 30 1E 32 1F 43 41 4C 4C 20 4D 45 20 31 30 31 1E 33 1F 33 1E 34 1F 33 1E 35 1F 33 1E 36 1F 33 03
It is configurable if AlphaCom requires a “Status information” message in return. It is also configurable which callstatus value which is required to consider the call to be successful (Recordtype 7).