Grandstream Networks UCM6102 User Manual page 31

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Note:

UCM6100 FXS ports lifeline functionality:
The UCM6100 FXS interfaces are metallic through to the FXO interfaces. If there is power outage,
FXS1 port will fail over to FXO 1 port, FXS 2 port will fail over to FXO 2 port. The user can still access
the PSTN connected with the FXO interfaces from FXS interfaces.
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Firmware Version 1.0.9.26
60950, AS/ACIF S002 and ITU-T K.21 (Basic Level)

UL 60950 (power adapter)
UCM6100 Series IP PBX User Manual Page 30 of 305