**Mandatory.** Should be implemented by all level I devices.

This is a response frame for the read/write page command. The Sequence number goes from 0 up to the last sent frame for a read page request. 

 | Data byte | Description      | 
 | :---------: | -----------      | 
 | 0         | Sequence number. | 
 | 1-7       | Data.            | 

The following format can be used for nodes on a Level II segment as a midway between a full Level II handling as specified in Class=1024 and Level I. 

 | Data byte | Description      | 
 | :---------: | -----------      | 
 | 0-15      | GUID.            | 
 | 16        | Sequence number. | 
 | 17-…    | Data.            | 

Data count can be as many as the buffer of the Level II node accepts. 
