SIHOT ←→ Telephone (PABX)
For telephone systems we define two levels. The differences are the supported operation codes (OC). As soon as all the OCs defined for a level are supported, this level is reached by the interface.
Level I
These OCs need to be supported:
| Operation Code | Description |
|---|---|
CI |
Check-In |
CO |
Check-Out |
COS |
Class of Service |
RM |
Room Move |
ACK |
Acknowledge |
PS |
Posting (Simple) |
PCO |
Pre Check-Out |
Level II
Level I and
| Operation Code | Description |
|---|---|
WU |
Wake Up Message |
WA |
Wake Up Answer |
MS |
Message Status |