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Yes, Snom M300, 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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