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This page describes the protocol implemented for Westpay's Pay@Table component.  This is the protocol that operates between the terminal and the restaurant's server that manages tables and orders.

Note that SEQR support is now obsolete, and will be removed from this protocol at some future stage.  It is kept here for reference only to support existing installations.

Message wrapper

The protocol is implemented as XML messages in a simpler wrapper.  The wrapper consists of a four byte header that gives the length of the data to follow.  If the data is 171 bytes long (0xAB) then the first four bytes of the message will be: