Envoy Application Programming Manual

ADM-2 Multipoint Supervisor Protocol
Envoy Application Programming Manual—427159-001
7-27
READ Procedure
Continuation READ (Line in READ State)
A READ following the initial READ is a continuation READ. A continuation READ
(Example 7-10
) causes Envoy, on behalf of the application process, to send the proper
acknowledgment for the preceding message and read the EOT indication from the
terminal. Following the receipt of the EOT indication, Envoy resumes polling the
network on behalf of the application process.
176 Poll sequence ended with no responder.
The specified number of passes have been
made through the poll list and no mes-
sage has been received. This error may
also indicate that an empty poll list was
specified.
CONTROL
177 Text overrun. The length of the message
received exceeds the length specified in
the read count parameter. Envoy retries
the READ (without sending a NAK) the
number of times specified by the retry
value.
CONTROL
178 No address list was specified.
CONTROL
Example 7-10. Continuation READ (Line in READ State)
Application Process Terminal
line state = READ
CALL READ(...)
| ACK -->
| <-- EOT
|
polling sequence resumes (see "Initial READ")
Table 7-8. Initial READ File-System Errors (page 2 of 2)
Error Numbers Description Resultant Line Number