X.25 User Facility Set Parameters

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 values

These are the packet sizes that will be 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 values

These are the window sizes that will be negotiated for incoming and outgoing packets if window size negotiation is set to Y.

Default: 2

Range: 1-7

Throughput class negotiation

(Required.) Enter Y if you want to implement throughput class negotiation. Enter N if you do not wish to implement throughput class negotiation.

Default: N

Throughput class negotiation values

Throughput class negotiation values depend upon the speed of the link. Table 7-1 "Throughput Class and Line Speed" shows the throughput classes and associated link speeds.

Range: 7-12, depending upon the speed of the link.

Default: 11

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.

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 (collect) call

(Required.) Enter Y if you wish to configure 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 (collect) call

(Required.) Enter Y if all calls sent by this 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