Envoy ACP/XF Configuration and Management Manual

WAN Subsystem Profiles and Modifiers for
EnvoyACP/XF
EnvoyACP/XF Configuration and Management Manual—429232-003
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Optional Modifier Descriptions
When the application sets the local RNR state, the receive RNR state is unaffected.
Thus, when an application sets the local RNR state, the remote station can enter RNR
state and remain in that state long enough to cause the RNR timer to expire.
New functions are provided by the modifiers SENDRNRRETRY and RNRTIMER.
Thus, the specification of SENDRNRRETRY and RNRTIMER could cause new
behavior. In previous versions of EnvoyACP/XF, the station was not disconnected
when retries of an RNR condition were exhausted. The line was left in ITS state after
rejecting outstanding application I/O requests. Leaving the line in ITS state caused
several application-level sequencing problems. To avoid these problems, the station is
now put into an LDS state when retries are exhausted or the RNRTIMER expires.
This modifier is supported only through the WAN subsystem. There is no SETMODE
function to allow an application to dynamically modify this modifier but you can modify
the modifier by using an SCF command to the EnvoyACP/XF subsystem.
SPEED
Specifies the line speed in bits per second (bps), divided by 100. This modifier should
accurately represent the actual speed of the line. If you do not know the correct speed,
estimate a slower speed rather than a faster one. EnvoyACP/XF uses the SPEED
modifier to calculate the appropriate value for XFERTIMER. If you incorrectly specify a
value that is faster than the line can handle, XFERTIMER times out before the frames
can be transmitted. The SPEED modifier also provides line-speed information in the
display produced by the SCF INFO LINE command.
You can alter this modifier by issuing an SCF ALTER LINE command to the
EnvoyACP/XF subsystem but not by issuing a SETMODE procedure call in an
application.
SREJ/NOSREJ
Specifies support for SREJ frame transmission and reception. If SREJ is not specified
(default), SREJ is not transmitted; if an SREJ is received, a frame reject (FRMR)
response reject (RSPR) frame is transmitted, as appropriate.
You can set or override this modifier by issuing a SETMODE 19 call in an application
or by issuing an SCF ALTER LINE command to the EnvoyACP/XF subsystem.
Default: 96
Units: 100 Bits per second
Range: 1 through 32767 (100 through 3276700 bps)
Default: NOSREJ (No support for SREJ.)
Units: N/A
Range: N/A