Enveloping Features; Transparency; Host Autodial - IBM 3708 Description

Enveloping Features
Transparency
Host Autodial
Two functions supported in protocol enveloping mode are data transparency and
host autodial. The following section describes their uses and how to configure the
3708 to perform them. .
With the appropriate configuration options, transparent operation can be obtained
in protocol enveloping mode. One use of transparency is file transfer. The following
configuration options are recommended for transparent operation:
Option
Transmit XONjXOFF
Receive XONjXOFF
Delay after Form Feed
Delay after CR
Full Duplex Line
Translate
Parity
Bits/Character
Full Duplex Control Unit
Delay after Receipt of CR
Recognize System Request Simulation
Send Read Prompt
Turnaround Characters
Value
OFF
OFF
000
000
Full
000000
None
8
Full
000
000
00
None
Because no line turnaround characters are defined, it may be necessary to define a
short text timeout to trigger data transfer to the host. Otherwise, data should be
padded to an RU boundary
(256
bytes) to guarantee timely transfer to the host.
While the 3708 does not explicitly support autodial, it is possible to perform autodial
through the 3708 with a programmable modem and help from a host application.
The line definition for the 3708 must be leased, and Logon Screens must be
excluded.
It
may also be necessary to turn the read prompt off. The modem should
be configured for auto dial support. The host application must send the 3708 the dial
digits including the modem dial commands. The 3708 recognizes this data as any
other data and sends the commands to the modem.
If
translation is specified, the
dial digits are translated. Call progress signals from the modem are received by the
3708 and forwarded to the host when a LTA is received or a text timeout occurs.
The host application must be able to interpret the call progress responses from the
modem.
Note: Standard switched line security features are bypassed with this function.
5-14
IBM 3708
Description