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C5-10
893-741-B
Network Protocols
Each LAT session has two slot groups: slot A is used for data transfer; slot B is used for out-of-band
data, containing serial port status, characteristics, and data stream attention. Slot data to and from
the session has a maximum of 256 bytes of user data.
A single packet at the virtual circuit layer can contain several slots. The LAT protocol multiplexes
data between the Model 5390 server and a particular host by combining several characters per user
in a slot, and several users in a virtual circuit packet.
Host Initiated Connections
Host initiated connections (HIC) is a network solicitation mechanism that handles printing from a
VMS host. When a VMS host needs to print, it first multicasts on the network. The responding
system either accepts the print request, or offers to place it in a queue. After the server accepts the
print request, it starts a connection to the host and begins the data transfer.
Using HIC, it is possible to print to a port that does not have an associated advertised service. All
configurations required for standard HIC printing apply, but the user does not have to edit the service
portion of the configuration file, and a service name is not required on the VMS side.
LAT and TCP/IP Gateway
A gateway enables a TCP/IP machine to Telnet to a LAT machine, and vice versa. The gateway is
configured by translation entries in the gateway section of the configuration file. Each entry specifies
the type, Telnet to LAT or LAT to Telnet. With an established connection through the gateway, the
translating Model 5390 server has two connections, one for the TCP/IP side and one for the LAT side.
NOTE:
Define the mode parameter for the Model 5390 port used for
HIC as slave (for more details, see Port Mode on page A3-5).
Summary of Contents for 5390
Page 28: ...893 741 B Figures xxviii ...
Page 44: ...893 741 B Preface xliv ...
Page 45: ......
Page 48: ......
Page 60: ...A1 12 893 741 B Introduction to the Model 5390 Server ...
Page 106: ...A3 18 893 741 B Configuring Ports ...
Page 142: ...A5 12 893 741 B Printers ...
Page 152: ...A6 10 893 741 B Modems ...
Page 168: ...A7 16 893 741 B Serial Line Internet Protocol SLIP ...
Page 224: ...A9 38 893 741 B Internetwork Packet Exchange IPX Protocol ...
Page 258: ...A11 12 893 741 B Dial up Networking ...
Page 289: ...893 741 B A12 31 Internet Protocol IP Routing that are possible ...
Page 506: ...A15 86 893 741 B Using Model 5390 Security ...
Page 507: ......
Page 544: ...B1 36 893 741 B Network Administration ...
Page 574: ...B2 30 893 741 B Simple Network Management Protocol SNMP ...
Page 575: ......
Page 606: ...C1 30 893 741 B na Commands ...
Page 676: ...C2 70 893 741 B Configuration Parameters ...
Page 772: ...C3 96 893 741 B Using the CLI Commands ...
Page 794: ...C5 12 893 741 B Network Protocols ...
Page 795: ......
Page 796: ... Appendix D1 Software Reference Part D Appendixes ...