|
| | ITU-X29
X29 format: call user data field
| bits 8 7 6 5 4 3 2 1 |
user data field |
| octets 1-4 |
Protocol identifier |
| octets 5-n |
Call data field |
| bits 8 7 6 5 4 3 2 1 |
protocol identifier |
| 0 0 0 0 0 0 0 1 |
for CCITT use |
| 0 1 0 0 0 0 0 0 |
for national use |
| 1 0 0 0 0 0 0 0 |
reserved for international user bodies |
| 1 1 0 0 0 0 0 0 |
for DTE-DTE use |
|
