Subject: Keeping all the bits and bytes straight

From: "Steve Klein (254-5623)" <[email-masked]>
Date: Thu, 8 Sep 94 14:50:26 EDT

As we have added control bytes to the SSP header, keeping track of
which control bytes are valid for which SSP message type has become
more complicated.  Does anyone see a value in adding a table like
the one below to the document?  An 'X' indicates that the field
for that column is valid for the message type.  A blank indicates
that the field is not valid for the message type.  A '?' indicates
that I'm not sure whether it's valid or not.

If you would like to see this table in the document, please review
it for accuracy.

Steve

+-------------------------+---------+---------+-------+----------+
|          (14)           |  (15)   |  (20)   | (21)  |   (22)   |
|         Message         |  Flow   | Largest |  SSP  | Circuit  |
|          Type           | Control |  Frame  | Flags | Priority |
|                         |  Byte   |  Size   |       |          |
+-------------------------+---------+---------+-------+----------+
| 0x03 - CANUREACH        |    X    |    X    |   X   |    X     |
| 0x04 - ICANREACH        |    X    |    X    |   X   |    X     |
| 0x05 - REACH_ACK        |    X    |         |       |    X     |
| 0x06 - DGRMFRAME        |    X    |         |       |          |
| 0x07 - XIDFRAME         |    X    |         |       |          |
| 0x08 - CONTACT          |    X    |         |       |          |
| 0x09 - CONTACTED        |    X    |         |       |          |
| 0x0A - INFOFRAME        |    X    |         |       |          |
| 0x0E - HALT_DL          |         |         |       |          |
| 0x0F - DL_HALTED        |         |         |       |          |
| 0x10 - RESTART_DL       |    ?    |         |       |          |
| 0x11 - DL_RESTARTED     |    ?    |         |       |          |
| 0x12 - NETBIOS_NQ       |         |    X    |   X   |          |
| 0x13 - NETBIOS_NR       |         |    X    |   X   |          |
| 0x14 - DATAFRAME        |    ?    |         |       |          |
| 0x19 - HALT_DL_NOACK    |         |         |       |          |
| 0x1A - NETBIOS_ANQ      |         |         |       |          |
| 0x1B - NETBIOS_ANR      |         |         |       |          |
| 0x20 - CAP_EXCHANGE     |         |         |       |          |
| 0x21 - IFCM             |    X    |         |       |          |
| 0x7A - TEST_CIRCUIT_REQ |         |         |       |          |
| 0x7B - TEST_CIRCUIT_RSP |         |         |       |          |
+-------------------------+---------+---------+-------+----------+