Configuring Background Tones for SBC Calls

You can configure the device to play a background tone (defined in the PRT file) to the call parties in an SBC call. The tone can be played to one or both of the call parties (caller and/or callee). When played to both parties, the tone is played simultaneously. The device can play the tone after call establishment or during early media.

For playing background tones, you need to configure a Message Manipulation rule (see Configuring SIP Message Manipulation) with the following special options:

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'Action Subject' field: Var.Call.Dst|Src.PlayBackgroundTone - enables background tone on the configured side (Dst) or peer side (Src)

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'Action Value' field: <side>,<tone ID>,<time between play>, where:

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<side> defines the call party to which the device plays the tone – both (caller and callee) or single (only on side according to Var.Call.Dst|Src.PlayBackgroundTone).

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<tone ID> defines the user-defined tone to play, by index in the PRT file (acUserDefineTone<ID>). For an explanation on the PRT file, see Uploading a Prerecorded Tones File.

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<time between play> defines the duration (1 to 600,000 msec) of no tone play between each play of tone. For example, you can use this option to play a beep every 3 seconds (periodically). Alternatively, if you want the device to play the tone continuously, don't configure this option.

For example:

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The value "both,5,3000" means that the device plays the acUserDefineTone5 tone (in the PRT file) every 3000 msec to both caller and callee.

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The value "single,5" means that the device plays the acUserDefineTone5 tone (in the PRT file) continuously to the configured party only.