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9.4 Intercom Control PDU<br />

9.4.1 Control Type<br />

560<br />

Section 9<br />

Radio Communications family<br />

This section specifies the 8-bit enumeration <strong>for</strong> the Control Type field in the Intercom Control PDU.<br />

Field Value Control Type<br />

0 Reserved<br />

1 Status<br />

2 Request - Acknowledge Required<br />

3 Request - No Acknowledge<br />

4 Ack - Request Granted<br />

5 Nack - Request Denied<br />

6-255 Reserved<br />

9.4.2 Communications Type<br />

This section specifies the 7-bit enumeration <strong>for</strong> the Communications Type sub-field of the<br />

Communications Channel Type field in the Intercom Control PDU.<br />

Field Value Communications Type<br />

9.4.3 Comm<strong>and</strong><br />

0 Reserved<br />

1 Connection FDX<br />

2 Connection HDX - Destination is Receive Only<br />

3 Connection HDX - Destination is Transmit Only<br />

4 Connection HDX<br />

5-255 Reserved<br />

This section specifies the 8-bit enumeration <strong>for</strong> the Comm<strong>and</strong> field in the Intercom Control PDU.<br />

Field Value Comm<strong>and</strong><br />

0 No Comm<strong>and</strong><br />

1 Status<br />

2 Connect<br />

3 Disconnect<br />

4 Reset<br />

5 On<br />

6 Off<br />

7-255 Reserved<br />

9.4.4 Transmit Line State<br />

This section specifies the 8-bit enumeration <strong>for</strong> the Transmit Line State field in the Intercom<br />

Control PDU.<br />

Field Value Transmit Line State<br />

0 Transmit Line State not applicable<br />

1 Not Transmitting

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