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Yes, Snom M300, M400, M700, M900 support the so called differentiated ringtone feature.
Based on this feature the PBX can distinguish between different type of calls (Internal, External, etc..) using the Alert-Info SIP header.
The handset will play a melody depending on the Alert-Info SIP header value. The following table describes the supported header values and the associated melody.
| Alert-Info SIP header | Melody |
Alert-Info: <http://www.notused.com>; info=external | Melody 1 |
Alert-Info: <http://www.notused.com>; info=vip | Melody 2 |
Alert-Info: <http://www.notused.com>; info=highpriority | Melody 3 |
Alert-Info: <http://www.notused.com>; info=lowpriority | Melody 4 |
Alert-Info: <http://www.notused.com>; info=blacklist | Melody 5 |
Alert-Info: <http://www.notused.com>; info=friends | Melody 6 |
In case you need to disable this feature you can disable the Remote Ring Tone Control setting under the server configuration (this setting is available since fw version 355B16):
Path to this Menu: WUI → Server
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