Adelante.smartpos 2 - Echo Test Service
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https://connectpayadmin.co.uk/services/smartpos2/Http/Echo.ashx?Function=XXX&Format=...

FUNCTION: ECHO
- Format: JSON, XML, QueryString
- Account: Account
- User: User
- Password: Password
- Input: Text Data To Echo
RETURNS
- Result: 'OK' or 'Error Message'