CAS R2 BACK DIGITS - Revision history

Allyntree at 14:10, 7 September 2022

2022-09-07T14:10:35Z

← Older revision		Revision as of 10:10, 7 September 2022
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			{{DISPLAYTITLE:CAS R2 BACK DIGITS}}

	The default CAS R2 scripts included with Toolpack present a way to configure the sequence of tone requests sent by the backward end.		The default CAS R2 scripts included with Toolpack present a way to configure the sequence of tone requests sent by the backward end.

Luc Morissette at 15:26, 9 November 2018

2018-11-09T15:26:00Z

← Older revision		Revision as of 11:26, 9 November 2018
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	-- Matching pattern Number of called number digits to request		-- Matching pattern Number of called number digits to request
	{ "^12", 6 }, -- Expect 6 called number digits, must start with "12" to match		{ "^12", 6 }, -- Expect 6 called number digits, must start with "12" to match
	{ "^0", 10 }, -- Expect 4 digits total, start with 0		{ "^0", 4 }, -- Expect 4 digits total, start with 0
	{ "^[23456789]", 10 } -- Expect 10 digits total, start with everything except 0 and 1		{ "^[23456789]", 10 } -- Expect 10 digits total, start with everything except 0 and 1
	-- If no matching pattern works, an unlimited number of called number digits		-- If no matching pattern works, an unlimited number of called number digits

Luc Morissette: LM Added dial plan examples and end_of_called number

2018-10-22T19:34:14Z

LM Added dial plan examples and end_of_called number

← Older revision		Revision as of 15:34, 22 October 2018
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	{		{
	-- Matching pattern Number of called number digits to request		-- Matching pattern Number of called number digits to request
	{ "^12", 6 }, -- Expect 6 called number digits, must be		{ "^12", 6 }, -- Expect 6 called number digits, must start with "12" to match
	~~-- before~~ "^1" ~~because otherwise it wouldn't~~		{ "^0", 10 }, -- Expect 4 digits total, start with 0
	-- ~~be matched~~		{ "^[23456789]", 10 } -- Expect 10 digits total, start with everything except 0 and 1
	{ "^1", 4 } -- Expect 4 digits total
	-- If no matching pattern works, an unlimited number of called number digits		-- If no matching pattern works, an unlimited number of called number digits
	-- are requested until the remote equipment stops providing them.		-- are requested until the remote equipment stops providing them.
			};


			'''(2.7.36+ only)''' The default end digit is 'F' or value 15. Some variants may be using value 12 ("C") or if end digit is not used, change it to "NO_DIGIT" like this:
			VARIABLES =
			{
			-- Variable name Default value Description
			{ "BACK_DIGITS", "G5A3V", "The backward digit string." },
			{ "END_OF_CALLED_NUMBER", NO_DIGIT, },
	};		};

Allyntree at 13:31, 12 March 2018

2018-03-12T13:31:59Z

← Older revision		Revision as of 09:31, 12 March 2018
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	-- are requested until the remote equipment stops providing them.		-- are requested until the remote equipment stops providing them.
	};		};

	~~[[category:Needs revising]]~~

Allyntree: Clarifiaction

2018-03-12T13:30:59Z

Clarifiaction

← Older revision		Revision as of 09:30, 12 March 2018
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	[[File:Casr2_fwd_bwd_diagram.png]]		[[File:Casr2_fwd_bwd_diagram.png]]

	In most implementations, the information available from CAS R2 signaling is exchanged with a compelled sequences of tones. A compelled sequence ~~consists into~~ the forward end ~~emitting~~ a digit and the backward end ~~responding~~ with a second digit. The backward end confirms reception of the digit by stopping to emit, and waits for the forward end to do so as well to initiate the next sequence. In a way, the forward end is mostly passive: it responds to backward end requests, except when the requests cannot be met, or for the first sequence.		In most implementations, the information available from CAS R2 signaling is exchanged with a compelled sequences of tones. In a compelled sequence, the forward end sends a digit and the backward end responds with a second digit. The backward end confirms reception of the digit by stopping to emit, and waits for the forward end to do so as well to initiate the next sequence. In a way, the forward end is mostly passive: it responds to backward end requests, except when the requests cannot be met, or for the first sequence.

	One way of representing such exchanges can be expressed as follows:		One way of representing such exchanges can be expressed as follows:

Allyntree at 18:04, 8 March 2018

2018-03-08T18:04:20Z

← Older revision		Revision as of 14:04, 8 March 2018
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	[[File:Casr2_fwd_bwd_diagram.png]]		[[File:Casr2_fwd_bwd_diagram.png]]

	In most implementations, the information available from CAS R2 signaling is exchanged ~~through~~ compelled sequences of tones. A compelled sequence consists into the forward end emitting a digit and the backward end responding with a second digit. The backward end confirms reception of the digit by stopping to emit, and waits for the forward end to do so as well to initiate the next sequence. In a way, the forward end is mostly passive: it responds to backward end requests, except when the requests cannot be met, or for the first sequence.		In most implementations, the information available from CAS R2 signaling is exchanged with a compelled sequences of tones. A compelled sequence consists into the forward end emitting a digit and the backward end responding with a second digit. The backward end confirms reception of the digit by stopping to emit, and waits for the forward end to do so as well to initiate the next sequence. In a way, the forward end is mostly passive: it responds to backward end requests, except when the requests cannot be met, or for the first sequence.

	One way of representing such exchanges can be expressed as follows:		One way of representing such exchanges can be expressed as follows:

Alexandre Tremblay: Added dial plan extension

2013-06-03T21:25:06Z

Added dial plan extension

@@ Line 57: / Line 57: @@
 '''(2.7+ only)''' The 'G' symbol may be used to indicate that '1's should be sent until no digit or a 'F' is received. The BACK_DIGITS thus becomes the following:
   BACK_DIGITS = "G5A3V"
 [[category:Needs revising]]

Alexandre Tremblay: Added 'G' symbol from release 2.7

2013-04-22T21:07:39Z

Added 'G' symbol from release 2.7

← Older revision		Revision as of 17:07, 22 April 2013
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	With such a string, the only thing to worry about is the length of the called number. If the called number length may vary, the number of '1's must match the longest possible number. In the case where the forward end receives a '1' when it has sent all its digits, the conventional way of handling this is for the forward end to not emit anything for a while, until the backward end detects this condition and requests something else. In this case, the default scripts in Toolpack will handle this case gracefully and skip the remaining '1's found in the BACK_DIGITS variable.		With such a string, the only thing to worry about is the length of the called number. If the called number length may vary, the number of '1's must match the longest possible number. In the case where the forward end receives a '1' when it has sent all its digits, the conventional way of handling this is for the forward end to not emit anything for a while, until the backward end detects this condition and requests something else. In this case, the default scripts in Toolpack will handle this case gracefully and skip the remaining '1's found in the BACK_DIGITS variable.

			'''(2.7+ only)''' The 'G' symbol may be used to indicate that '1's should be sent until no digit or a 'F' is received. The BACK_DIGITS thus becomes the following:
			BACK_DIGITS = "G5A3V"

	[[category:Needs revising]]		[[category:Needs revising]]

Lucas Trottier at 19:22, 13 December 2011

2011-12-13T19:22:23Z

← Older revision		Revision as of 15:22, 13 December 2011
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	The default CAS R2 scripts included with Toolpack present a way to configure the sequence of tone requests sent by the backward end.		The default CAS R2 scripts included with Toolpack present a way to configure the sequence of tone requests sent by the backward end.

	To learn how to set a CAS R2 variable in Toolpack, refer to the [[Web_Portal]] Tutorial Guide.		To learn how to set a CAS R2 variable in Toolpack, refer to the latest [[Web_Portal]] Tutorial Guide.

	''The digit meanings in this article are the ones defined in the [[CAS R2 ITU specification]]. Digit meanings may vary depending on the variant specification.''		''The digit meanings in this article are the ones defined in the [[CAS R2 ITU specification]]. Digit meanings may vary depending on the variant specification.''

Lucas Trottier: Add link to web portal tutorial

2011-12-13T19:21:56Z

Add link to web portal tutorial

← Older revision		Revision as of 15:21, 13 December 2011
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	The default CAS R2 scripts included with Toolpack present a way to configure the sequence of tone requests sent by the backward end.		The default CAS R2 scripts included with Toolpack present a way to configure the sequence of tone requests sent by the backward end.

	To learn how to set a CAS R2 variable in Toolpack, refer to the [[~~Setting CAS R2 variables~~]] ~~article~~.		To learn how to set a CAS R2 variable in Toolpack, refer to the [[Web_Portal]] Tutorial Guide.

	''The digit meanings in this article are the ones defined in the [[CAS R2 ITU specification]]. Digit meanings may vary depending on the variant specification.''		''The digit meanings in this article are the ones defined in the [[CAS R2 ITU specification]]. Digit meanings may vary depending on the variant specification.''