o  incompatible data sizes

    The level 2 link service provider has not been configured for a
    sufficiently large data size. The level 2 link service data size
    must be at least 260 and at least the DTE maximum packet size +4.

 o  incompatible profiles

    There is a mismatch between the x25 protocol dte profile and the
    link service provider profile.

 o  insufficient information

    inbound dte class, link service provider or x25 address
    characteristics necessary for the successful completion of the
    operation has not been set.

 o  link service provider error

    Level 2 link service provider has flagged an error.

 o  link service provider in use

    Another network layer entity is already using the specified link
    service provider.

 o  no such link service provider

    The link service provider specified in the DTE does not exist.