Patch-ID# 100464-01
Keywords: dsr, spc, modem, serial, cu, tip, lck, glitches, dcd, line, spc/s, 
Synopsis: SPC 1.1: glitches on DCD line causes spc/s to incorrectly handle modem control lines
Date: 18/Dec/91

SunOS release: 

Unbundled Product: Sun SPC

Unbundled Release: 1.1

Topic: glitches on DCD line

BugId's fixed with this patch: 1065018

Architectures for which this patch is available: sun4c

Patches which may conflict with this patch: 

Obsoleted by: 

Files included with this patch: whole product

Problem Description: 

bugid: 1065018
A customer has a 2400 Hayes modem that produces a glitch on the DCD line 
when he tries to end his cu session. The spc/s port, to which the modem
is atached, is configured for dialin/dialout modem use. When the customer 
exits his cu session, the small glitch his modem produces on the DCD line
is just enough to confuse the spc drivers.  As a result, cu does not 
completely clean up its processes or lock file in /var/spool/locks.  The 
cu receive (child) process exits, but the original transmit process is hung
on a close.  No error messages are produced.

Other:
This jumbo patch contains several other fixes.

Install Instructions: 

The patch is in the form of the original product and cdmanger can
be used to install this product. There is a README under the CDROM
directory that has further information as how to install this software.