ISUP v2 Functions
Basic Call Requirements
Function | Implemented | Notes |
---|---|---|
Speech/3.1KHz Audio | YES | – |
En Bloc Address Signaling | YES | |
Transit Network Selection | YES | |
Continuity Check | YES | |
Compatibility Procedure | NO | A method will be implemented to determine the type of exchange (A/B) based on the call destination. |
Confusion Procedure | NO | |
Simple Segmentation | NO | |
Tones and Announcements | YES | |
Simple Echo Control Signaling Procedure | Partial | |
Automatic Repeat Attempt | Partial | Only in case of dual seizure |
Block/Unblock of circuits/groups | YES | |
Circuit Group Query | YES | |
Dual Seizure | YES | Handled |
Transmission Alarm Handling for Inter-Exchange circuits | NO | |
Reset of circuits/groups | YES | |
Receipt of unreasonable signaling information | NO | |
Access Delivery Information | NO | |
Transportation of User Teleservice Information | NO | |
Suspend and Resume | NO | |
ISUP Signaling Congestion Control | YES | |
Automatic Congestion Control | YES | |
Unequipped Circuit ID Code | – | |
MTP Pause and Resume | NO | |
Hop Counter Procedure | YES |
Generic Signaling Procedure for Supplementary Services
Function | Implemented | Notes |
---|---|---|
End-to-End signaling: Pass Along Method | NO | ————————————————————————————————————————— |
Generic Number Transfer | YES | |
Generic Digit Transfer | YES | |
Generic Notification Procedure | YES | |
Service Activation Procedure-Transited only | NO | |
Remote Operations Services (ROSE) capability-Transited only | NO |
Supplementary Services Requirements (partly handled by Asterisk)
Function | Implemented | Notes |
---|---|---|
Direct Dialing in (DDI) | YES | ——————————————————————————————— |
Calling Line Identification Presentation (CLIP) | YES | |
Calling Line Identification Restriction (CLIR) | YES | |
Terminal Portability (TP) | YES | |
CFU, CFB, CFNR | YES | |
Call Deflection | YES | |
Call Waiting (CW) | YES | |
Call Hold (HOLD) | YES | |
Three-party Service (3PTY) | YES |