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Operation By Battery
If the power cord is not plugged into the unit, and the battery is available, the unit enters
Battery Operation Mode. In this mode, the unit fully supports all operational features,
except the intercom call function and cordless handset.
NOTE: Under battery operation mode, the RF module (optional for use with cordless handset)
is not supported.
Operation without Power
If the power cord is not plugged into the unit and no battery is installed, the unit enters
into No Power Operation mode. in this mode, the user may:
1) use the handset to manually make a call on line 1 only,
2) answer a call on line 1 with the handset.
Cordless Phone Option
It is possible to enhance your phone to a cordless feature with the additional purchase of
the H5401 accessory handset and module. The H5401 is packaged with an RF module, when
the module is properly inserted into the back of the 25425 base, the antenna icon on the
display will illuminate.
Troubleshooting Guide
No dial tone
• Check or repeat installation steps:
• Make sure the telephone line cords are connected to the phone and the wall jack. Make
sure the line cords are not damaged.
• Make sure the hook switch pops up when the handset is lifted.
• Check the SPEAKER button. Make sure the indicator is off.
• Disconnect the phone from the wall jack and connect another phone to the same jack.
If there is no dial tone in the second phone, the problem might be your wiring or local
service.
You cannot be heard by the other party.
• Make sure the handset or headset cord is inserted properly and securely.
• Make sure the MUTE feature is not turned on.
Troubleshooting Guide