M1 Messenger is a free messenger supporting SIP protocol

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Use M1 Messenger instead of desktop IP phones.

Works with any SIP based PBX.

A push mode to save battery life.

SIP supporting advantages:

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Easy routing audio and video calls from M1 Messenger's users to any Contact Center or IP PBX

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You can make and receive calls to M1 Messenger using any IP phone or VOIP gateway

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You can call to any M1 Messenger’s user from web page using WebRTC service

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You can easily route any virtual phone number (DID) to  M1 Messenger  using SIP URI functionality