ESPA 4.4.4: Difference between revisions
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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 wireless pager transmitter either due to manual or automatic action. | * '''Output''': Sends a “start paging” message to a [[Pocket Paging|wireless pager transmitter]] either due to [[Pocket_Paging#Feature_description|manual action by a user]], or by automatic action such an activation of an input (alarm). | ||
* 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. ( | * '''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 interface via ESPA444|Fire Alarm protocol]]”). The ESPA 4.4.4 message is finally forwarded to one of the AlphaCom’s pager protocol outputs. | ||
== Message example == | == Message example == | ||
Typical example of a ESPA 4.4.4 message which AlphaCom will send to a paging system (checksum not | Typical example of a ESPA 4.4.4 message which AlphaCom will send to a paging system (checksum not shown): | ||
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 | 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 | ||
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== Reference == | == Reference == | ||
[http://www. | [http://www.osca-uk.com/ESPA%20444.pdf www.osca-uk.com/ESPA%20444.pdf] | ||
[[Category: | [[Category: Pocket pager]] | ||
[[Category: Protocols]] | |||
Latest revision as of 09:36, 20 June 2018
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 pager transmitter either due to manual action by a user, or by automatic action such an activation of an input (alarm).
- 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”). The ESPA 4.4.4 message is finally forwarded to one of the AlphaCom’s pager protocol outputs.
Message example
Typical example of a ESPA 4.4.4 message which AlphaCom will send to a paging system (checksum not shown):
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).