Keypad
Inbound Blacklist & Spam Blocker
Inbound Blacklist & Spam Blocker Guide
Blocks unwanted spam callers before they reach extensions, queues, or IVR menus at trunk entry. Caller ID lookup is performed against Asterisk AstDB in sub-microseconds.
- Play Busy (17 / Busy Here): Returns busy signal (ISDN 17 / SIP 486 Busy Here).
- Congestion / No Circuit (34): Returns congestion / no circuit (ISDN 34 / SIP 503 Service Unavailable).
- Immediate Drop (16): Terminates call immediately without playing audio (ISDN 16).
- Number Not in Service (ss-noservice): Answers and plays the "number not in service" system announcement before hangup.
- Pattern Support: Use dialplan patterns to block number prefixes (e.g. _0850. or _+1800.).
| Caller Number / Pattern | Description / Reason | Block Action | Status | Actions |
|---|---|---|---|---|
anonymous
|
Hidden numbers | Number Not in Service (ss-noservice) | ||
+447700900999
|
Spam | Immediate Drop (16) | ||
+15550198
|
Survey calls | Play Busy (17 / Busy Here) | ||
+15550199
|
Robocall | Immediate Drop (16) |