Hi, under “Service Passthrough” the SIP ALG mode is selectable between “Standard Mode” and “Compatibility Mode”. The 5.2.0 user manual (section 18.4) doesn’t say much more. Operationally what exactly changes (i.e. what makes “standard” less compatible) between the two modes?
From the manual:
Session Initiation Protocol, aka SIP, is a voice-over-IP protocol. Peplink Balance can act as a SIP Application Layer Gateway (ALG) which binds connections for the same SIP session to the same WAN connection and translate IP address in the SIP packets correctly in NAT mode. Such passthrough support is always enabled and there are two modes for selection: Standard Mode and Compatibility Mode