Cisco Model D-PCG1000 PowerKEY CAS Gateway Release Notes

 

4 

4013491 Rev C 

Adding and Splitting QPSK Modulators for System Releases 2.5, 3.5, and 4.0 (part number 
4002549, published September 2005) 

Adding and Splitting QPSK Modulators for System Releases 2.7/3.7 or SR 4.2 (part 
number 4015109, expected publish date: early 2007) 

 

An issue with QPSK C81 and earlier releases can cause an "artificial sign-on limit," 
an arbitrary sign-on limit for DHCTs, much less than the advertised 16000. In this 
condition, the QPSK sets a dynamically reducing limit to the number of DHCTs it 
can sign on and hence allocate IP addresses. When this limit becomes less than the 
DHCTs signed on to the QPSK, a new DHCT will not get an IP address unless 
another DHCT is released.  

This "artificial sign-on limit” takes months to exhibit. Due to a significant reduction 
in reboots with C81, this error became more prominent on that release. Replacing 
C81 with QPSK E14 fixes this issue. 

 

In QPSK C81, QPSK modulators would occasionally lock up if new modulator code 
was downloaded due to unintentional reboot during a period of high traffic. In this 
situation, the workaround was to revert to the older code from the DNCS, wait 15 
minutes, and then intentionally reboot the modulator to download the new code. 
This issue has been corrected with QPSK E14. 

 

In earlier releases, the QPSK modulator's Ethernet MAC RX process could freeze.  If 
this occurred, the out-of-band path was cut off, and the modulator needed to be 
rebooted.  CR 54139 adds functionality to keep the Ethernet MAC RX process from 
freezing.