This commit allows create call flow extension with some feature code (e.g. `*401`) Then on the phone you can configure BLF like `flow+*401` and use `call_flow_subscribe` to track current status of this call flow. BLF like `*401` will also works but only if use `call_flow_monitor` script. Also it is possible dial `flow+*401` as well as `*401` to toggle call flow state. |
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