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The On Hook Dial function allows you to dial while listening to the tone from the internal speaker.
You can send a fax checking the connection.
You can send only one page at a time when scanning using the exposure glass.
For SP 3610SF, you cannot scan two-sided originals when using this function.
You can only use the number keys to specify the destination.
Place the original, and then select the scan settings you require
Press [On Hook Dial]
You will hear a low tone from the internal speaker.
If you want to cancel this operation, press the [On Hook Dial] key again.
Enter the fax number manually using the number keys
The machine immediately dials the destination.
If you make a mistake, press the [On Hook Dial] or [Reset] key, and then try again.
When the line is connected and you hear a high-pitched tone, press [Start]
If you want to cancel a transmission, press the [Clear/Stop] key, and then remove the originals.
If you have an external telephone on the fax machine, you can speak with the other party when you hear a voice. If you hear a voice before pressing the [Start] key, pick up the external telephone and tell the receiver you want to send a fax document (ask them to switch to facsimile mode).
When the original is placed on the exposure glass, press [Start TX]
This function is unavailable in some countries.
Press the [
] or [
] key to adjust the volume of the on-hook sound in four levels. At the maximum volume level, changes to 
. Similarly, at the minimum level (off), changes to 
. The volume can also be preprogrammed in [Adjust Sound Volume] in [General Settings/Adjust] under [Fax Features].The [Fax Features] menu contains the [On Hook Release Time] setting, which allows you to specify the time after which On Hook mode is deactivated. See General Settings/Adjust.
(mainly North America)
You can also use the optional handset as an external telephone.
