Skip to content

POLARITY()

Synopsis

Set or get the polarity of a DAHDI channel.

Description

The POLARITY function can be used to set the polarity of a DAHDI channel.

Applies only to FXS channels (using FXO signalling) with supporting hardware.

The polarity can be set to the following numeric or named values:

  • 0

  • idle

  • 1

  • reverse However, when read, the function will always return 0 or 1.

Example: Set idle polarity
same => n,Set(POLARITY()=0)
Example: Set reverse polarity
same => n,NoOp(Current Polarity: ${POLARITY()})
same => n,Set(POLARITY()=reverse)
same => n,NoOp(New Polarity: ${POLARITY()})
Example: Reverse the polarity from whatever it is currently
same => n,Set(POLARITY()=${IF($[ "${POLARITY()}" = "1" ]?0:1)})

Syntax

POLARITY()
Arguments

Generated Version

This documentation was generated from Asterisk branch 16 using version GIT