Why should the POS machine sign in?

POS machine sign in
Regarding signing in to different POS machines, the account number and password are different, for example:

1. ICBC POS machine, operator: 201; password: 000000

2, Agricultural Bank POS machine, operator: 01; password: 0000

Sometimes by logging in the account number and password, the online check-in is not triggered (that is, the POS machine does not dial the host and jumps directly to the standby interface). This only implements the login of the account. When you make the first online transaction, the POS machine First check in by default, then online transactions.

For example, if the POS machine does not sign in, the direct card swiping will be particularly slow, because the POS machine first signs in by default, and then reads the bank card for consumer transactions.

Sign-in purpose
The two purposes of the POS machine are:
1, the link host proves that the high pos device is legal
2. Download the latest work key steps:
1. Set legal work key, bank card center number, merchant number, terminal number
2, dial-up online
3, return to sign in success or failure