X25AM Programming Manual

Contents

X25AM Programming Manual—527201-001

1. Introduction (continued)

Packet-Layer Subscription Parameters 1-15

Per Call Facilities 1-16

Closed User Group (CUG) Facility 1-16

Reverse Charging 1-16

Packet-Size Negotiation 1-16

Window-Size Negotiation 1-17

Throughput-Class Negotiation 1-17

Fast-Select Facility 1-17

DATAPAC Priority Call Facility 1-18

TELENET Facilities for Flow-Control Negotiation 1-18

Bilateral Closed User Group (CUG) Facilities 1-18

Recognized Private Operating Agency (RPOA) Facilities 1-18

Transit Delay Selection and Indication Facility 1-18

Annex G CCITT-Specified DTE Facilities 1-19

Call Redirection Notification Facility 1-19

Modified Called Line Address Notification Facilities 1-19

Other X25AM Connection Methods 1-19

Expand-Over-X25AM 1-19

SNAX-Over-X25AM 1-20

The Modem Interface 1-20

2. ITI Applications

ATP6100 I/Os Compared to X25AM 2-1

High-Level View of the Application and X25AM 2-1

The ITI File-System Interface 2-2

File-System Procedures Supported by ITI 2-2

The Remote Terminal and the Subdevice File 2-3

Phases of a Connection 2-3

Initiating a Call 2-3

Waiting for a Call 2-4

Initial PAD Parameter Configuration 2-4

Exchanging Data 2-4

Clearing a Call 2-6

The PACKET ASSEMBLER/ DISASSEMBLER (PAD) 2-7

Packet Exchange between the PAD and ITI 2-9

PAD Parameters 2-10

Terminal Operation 2-13

Changing the Terminal Mode with SETMODE 2-14