Tech Stuff - ISDN Timers
The following timers are defined by the ITU for use with ISDN.
| Name |
Started |
Stopped |
Value |
Notes |
| T301 |
ALERT |
CONNECT |
- |
- |
| T302 |
SETUP |
SETUP_ACK |
- |
Overlapped sending only |
| T303 |
SETUP |
CALL_PROC |
- |
- |
| T304 |
SETUP |
SETUP_ACK |
- |
- |
| T305 |
DISC |
RELEASE |
- |
- |
| T306 |
- |
- |
- |
- |
| T308 |
RELEASE |
REL_COM |
- |
- |
| T309 |
- |
- |
- |
How long to keep B channels when D channel goes down. |
| T310 |
CALL_PROC |
ALERT/CONNECT |
- |
- |
| T314 |
- |
- |
- |
Segmentation |
| T316 |
RESTART |
RESTART_ACK/REJ |
- |
- |
| T317 |
- |
- |
- |
- |
| T318 |
RESUME |
RESUME_ACK/REJ |
- |
- |
| T319 |
SUSPEND |
SUSPEND_ACK/REJ |
- |
- |
| T321 |
- |
- |
- |
D channel failure to restart attempts |
| T316 |
STATUS |
DISC/REL/REL_COM |
- |
- |
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