Flag | Address | Control | Information | CRC | Flag |
Address (2 octets) | |||||||
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
SAPI (6 bits) | C/R | EA0 | |||||
TEI (7 bits) | EA1 |
SAPI | Description |
0 | Call control procedures |
1 | Packet Mode using Q.931 call procedures |
16 | Packet Mode communications procedures |
32-47 | Reserved for national use |
63 | Management Procedures |
Others | Reserved for Future Use |
TEI | Description |
0-63 | Fixed TEI assignments |
64-126 | Dynamic TEI assignment (assigned by the switch) |
127 | Broadcast to all devices |