vFrame relay direct network: Allows data that uses SNA, TCP/IP, or IPX communications over a
vBridged frame relay network: Allows AS/400 to communicate over a
For more information, see Frame relay.
Integrated services digital network
You can connect your AS/400 to an Integrated Services Digital Network (ISDN) for faster, more accurate data transmission. An ISDN is a public or private digital communications network that can support data, fax, image, and otherservices over the same physical interface. Also, you can use other protocols on ISDN, such as ISDN data link control (IDLC), PPP, fax, and X.25.
ISDN provides benefits that are not found in more conventional types of communications. These include the following:
vHigh speed, low error rate communications
vSwitched, high speed communications
vSwitched, digital networking
vAdvanced networking functions
vIntegration of voice and data transmissions
vIntegrated support of packet switching (X.31)
For more information on ISDN, see the topics ISDN on AS/400 and ISDN data link control network.
ISDN data link control network
You can use ISDN data link control (IDLC) to connect two systems to exchange information over an ISDN
IDLC complies with the data link control protocols that are defined in CCITT Recommendations Q.921 and Q.922. IDLC defines a set of protocol rules and formats for use on
Similar to other data link protocols, IDLC has special considerations for operation:
vIDLC parameters used to establish the logical connection
vDelayed contact for permanent connection
vFrame size related to performance
vDisconnect parameters for a switched IDLC controller
Synchronous data link control network
SDLC has the following meanings:
vA form of communications line control that uses commands to control the transfer of data over a communications line.
vA communications discipline that conforms to subsets of the Advanced Data Communication Control Procedures (ADCCP) of the American National Standards Institute (ANSI) and
SDLC is used for transferring synchronous,
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