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Re: [Megaco] Pulse Metering



Hello Bruno,

Please see my responses below.

Regards, Christian



I have a question about the Metering Pulse Burst signal defined in H.248.26 (01/2005). This signal has two parameters: Burst Pulse Count & Pulse Repetion Interval. The Burst Pulse Count parameter specifies the number of metering pulses to be applied as a burst on the line. The description of this parameter says that "The type, duration and pulse repetition interval for the metering pulses comprising the burst are provisioned in the MG".

[CNG] I checked the original contribution (AVD-2496 from Beijing May 2004 <http://wftp3.itu.int/av-arch//avc-site/2001-2004/0405_Bei/AVD-2496.zip> ) and "Repetition Interval" being specified as provisioned wasn't there. I suspect is crept in during editing along the line.

Considering that the pulse repetition interval is provisioned in the MG, I don't understand the reason why this signal has a "Pulse Repetition Interval" parameter. Furthermore the default value for the "Pulse Repetition Interval" parameter is "1" rather than "provisioned".

[CNG] I think it should essentially follow what has been defined by the RPI parameter in 6.3.1.1.2. It assumes that a value must be specified. So in fact in 6.3.1.1.2 with "Optional: No" there is no default because a value must always be sent. It follows then that 6.3.2.1.2 should say "Optional: No", "Default: None". This seems to align with the original intent.

Can someone shade some light on this?

[CNG] I've cc'd Kevin as he was editor and contributor on this.

Thanks
Bruno

*6.3.2.1.1 Burst Pulse Count*
Parameter name: Burst Pulse Count
Parameter ID: bpc (0x0001)
Description: This parameter specifies the number of metering pulses to be applied as a burst on the line. The type, duration and pulse repetition interval for the metering
pulses comprising the burst are provisioned in the MG.
Type: Integer
Optional: Yes
Possible values: 1 or more pulses
Default: 1 *
6.3.2.1.2 Pulse Repetition Interval*
Parameter name: Pulse Repetition Interval
Parameter ID: pri (0x0002)
Description: Interval from the leading edge of a metering pulse to the leading edge of the
next metering pulse.
Type: Integer
Optional: Yes
Possible values: 1 or more milliseconds
Default: 1 _______________________________________________
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