CCT - Communication Control Table

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This table provides definitions used by the ISC (Inter System Communication) component to build up connections with remote systems, either UNIX, VSE or MVS.

To define an entry in this table the directive define partner is used.

define connection

Defines a connection entry in the XCICS/TS terminal table (TCT).

define connectionsysid=<value>,
type=(tcp|sna|alias),
[netname=<value>,]
[mode=<value>,]
[os=(ebcdic|ascii),]
[acquire,]
[syncpoint=(simple|implied_forget|explicit_forget),]
[symbolic_destination=<value>];

 

sysid

Is an identifier for intercommunication links and corresponds to the name specified in the SYSIDNT parameter of the DFHTCT TYPE=SYSTEM macro in the IBM CICS configuration

type

It refers to the transport type for the connection:

sna - SNA/APPC connection through APPC APIs
tcp - APPC over TCP/IP

SNA connections are operated by means of a vendor dependant communication software such:

Dataconnection SNAP/IX
IBM Communication Server
HP SNAplus 2

and can be established between XCICS/TS and another system speaking APPC (i.e IBM CICS regions, another XCICS/TS region or any other APPC software) 

TCP connections do bot require other third party software, but are supported only between XCICS/TS regions.

symbolic_destination

Only for alias connection, the CPI-C symbolic destination identifing the partner.

netname

Only for sna connections, Name of the LU identifing the partner: normally it should coincide with the name of the CICS region with which it wants to converse.

mode

Only for sna connections, Name of the Dialog Mode used in the conversation.

acquire

If specified, XCICS tryes to acquire the connection automatically on startup.

os

Specifies OS encoding, for automated data conversion. Possible values:

ascii
ebcdic

By default, EBCDIC is assumed.

syncpoint

Specifies syncpoint transmission type. Possible values:

simple
implied_forget
explicit_forget

By default, implied_forget is assumed.

For further information about syncpoint propagation, please refer to the "Distributed Transaction Processing" chapter in the "Intersystem Communication" section.