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$$server.1: Primary SIP Server of Account 1
$$userId_1: SIP User ID of Account 1
$$authenId_1: Authenticate ID of Account 1
$$pw_1: Authenticate Password of Account 1
$$server.2: Primary SIP Server of Account 2
$$userId_2: SIP User ID of Account 2
$$authenId_2: Authenticate ID of Account 2
$$pw_2: Authenticate Password of Account 2
The corresponding item contents are shown as below: