aluVoiceSignalingLeadsState is an array of two bytes used to indicate the current state of the output (or drive) and input (or scan) signaling leads (AluVoiceSignalingLead). This object is valid for em channels only. This object is invalid for em channels whose aluVoiceSignalingMode is 'transmissionOnly'. The byte arrangement is as follows: byte array index: | 0 1 | signaling lead: | M E | Each byte represents the state of the respective signaling lead. Valid byte values are: 1 = ON (or high as per AluVoiceSignalingLead) 2 = OFF (or low as per AluVoiceSignalingLead) All other byte values are undefined.