Transferor::createCallerId

static function createCallerId($targetType, $targetId)
{
	if($targetType === Target::USER || $targetType === Target::QUEUE)
	{
		return $targetType . ':' . $targetId;
	}
	if($targetType === Target::PSTN)
	{
		return CVoxImplantPhone::stripLetters($targetId);
	}

	throw new ArgumentException('Unknown target type ' . $targetType);
}