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X.25 User Facility Set Parameters The X.25 User Facility Set Parameters screen (#161) in figure 7-7 is displayed when you press the [Add] or [Modify] function key at the X.25 User Facility Sets screen (figure 7-6). It is also displayed when you type the path name: @NETXPORT.NI.NIname.PROTOCOL.X25.FACSET.fsetname in the Command window of any screen and press the [Enter] key, where NIname is a configured X.25 NI and fsetname is a configured X.25 facility set.Figure 7-7. X.25 User Facility Set Parameters Press the [Save Data] function key to transfer the data displayed on the screen to the configuration file. Verify that the data record has been created by checking that the Data flag is set to Y. Fields Packet size negotiation (Required.) Enter Y if you want to implement packet size negotiation. Enter N if you do not wish to implement packet size negotiation. Default: N Range: Y or N Packet size negotiation These are the packet sizes that will be values negotiated for incoming and outgoing packets if packet size negotiation is set to Y. Default: 128 Range: 16, 32, 64, 128, 256, 512, 1024, 2048, 4096 Window size negotiation (Required.) Enter Y if you want to implement window size negotiation. Enter N if you do not wish to implement window size negotiation. Default: N Range: Y or N Window size negotiation These are the window sizes that will be values negotiated for incoming and outgoing packets if window size negotiation is set to Y. Default: 2 Range: 1-7 Throughput class (Required.) Enter Y if you want to implement negotiation throughput class negotiation. Enter N if you do not wish to implement throughput class negotiation. Default: N Throughput class Throughput class negotiation values depend upon negotiation values the speed of the link. Table 7-1 shows the throughput classes and associated link speeds. Table 7-1. Throughput Class and Line Speed ------------------------------------------------------------------------------------------- | | | Throughput Class Line Speed | | | | 7 1200 | | | | 8 2400 | | | | 9 4800 | | | | 10 9600 | | | | 11 19200 | | | | 12 48000 | | | ------------------------------------------------------------------------------------------- ______________________________________________ CAUTION Answer Y (Yes) to negotiation only if you subscribed for negotiation. Some networks will reject a call with negotiation if you did NOT subscribe for negotiation. Also, if you did subscribe for negotiation, it is preferable to answer Y because certain networks will clear a call if you subscribe for negotiation but answer N (No) for negotiation. ______________________________________________ Range: 7-12, depending upon the speed of the link. Default: 11 (19200 bps) Use of D-bit (Required.) Enter Y if you want to enable delivery confirmation with this set of circuits. Enter N if you either do not subscribe to this facility, or do not want delivery confirmation enabled for this set of circuits. Accept reverse charge (Required.) Enter Y if you wish to configure (collect) call the link to receive reverse charge calls on this set of circuits. Enter N if you either do not subscribe to this facility, or do not want to accept reverse charging on this set of circuits. Default: N Range: Y or N Make reverse charge (Required.) Enter Y if all calls sent by this (collect) call set of switched virtual circuits (SVC) request reverse charging. Enter N if you either do not subscribe to this facility, or do not want reverse charging capabilities enabled for this set of circuits. Default: N Range: Y or N Closed user group (CUG) (Required.) The closed user group (CUG) facility enables a group of DTE devices to communicate only with other members of the same CUG and prevents access from any device or user that is not in this CUG. Answer Y if you subscribed to a CUG using the basic format and if you want to use this CUG with this SVC set. Answer N if you did not subscribe to a CUG using the basic format or if you do not want this SVC set to belong to a CUG. Default: N Range: Y or N Fast select Answer Y if you wish to make or receive a fast select call with this set of circuits. Enter N if you either do not subscribe to this facility, or do not want fast select capability enabled for this set of circuits. Default: N Fast select restricted Enter Y if you want the remote node(s) to reject any call made with the fast select facility. You can answer Y in this field only if you answered Y in the fast select field. Enter N to enable the remote node(s) to accept or reject fast-select calls. Default: N Range: Y or N CUG number If the closed user group facility is enabled for this set of circuits, specify the number of the CUG to be used. Default: 0 Range: 0-99
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