Sokkia SRX1 Operator's Manual page 46

8. CONNECTING TO EXTERNAL DEVICES
5. When "Authentication" is set to "Yes", input the
same passkey as that for the intended companion
device. Even if "Authentication" is set to "No", a
passkey is requested when authentication is set
on the companion device being used.
• Up to 16 numeral characters can be input. Input
characters will be displayed as asterisks (e.g.
"*****"). The passkey was set to "0123" at the
factory.
6. Press [OK] to finish settings.
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