Envoy ACP/XF Application Programming Manual

Contents
EnvoyACP/XF Application Programming Manual–132179
iv
2. Asynchronous Balanced Mode (ABM)
Protocols (continued)
2. Asynchronous Balanced Mode (ABM) Protocols (continued)
Extended Address Field 2-6
Extended Control Field
2-6
Timers and Number of Retries
2-7
Reject (REJ)
2-9
Selective Reject (SREJ)
2-10
Activating a Line
2-10
Transferring Data
2-11
Transmitting I-Frames
2-11
Accepting Incoming I-Frames
2-11
Queuing I/O Requests
2-11
Message Control Word (MCW)
2-11
Shutting Down a Data Link
2-11
Pseudocode Examples
2-13
Initiating and Terminating an HDLC Link
2-13
Initiating and Terminating an ADCCP-ABM Link
2-14
3. Normal Response Mode (NRM) Protocols
NRM Features 3-1
NRM Application Process Interface
3-2
Opening a Line
3-2
Setting Line Capability Characteristics
3-2
Primary or Secondary Station
3-3
NRM Address Verification
3-3
ADCCP-NRM Extended Addressing
3-3
Extended Control Fields
3-4
IBM Extended Control Fields
3-4
Polling Interval
3-5
Timers and Number of Retries
3-6
Two-Way Alternate (TWA) Versus Two-Way Simultaneous (TWS) Operation
3-10
ASCII/EBCDIC Line Code
3-11
Reject (REJ)
3-12
Selective Frame Reject (SREJ)
3-12
Initializing a Link
3-12
Establishing and Controlling a Data Link
3-13
Standard Link Establishment and DM
3-13
Link Establishment with IBM SDLC Loop Controller
3-14
Transferring Frames
3-16
Message Control Word (MCW)
3-17