Product Description - Release 5.1.9
Release 5.1.9 is a maintenance host release for the 5.1 platform. The functional enhancements
involve more efficient router cache updates during redundant CPU switching. In order for
routers to more quickly update their ARP cache, a NULL APR request is sent out upon boot
time. Routers should if they already have the IMACS'' MAC address in their cache, update it
even though the request is not directed to the router itself. Using this update mechanism, the
IMACS should automatically update the cache of nearby routers upon redundant CPU
switching. This should remove thedelay needed forrouters to age outtheir old cache entry for
the CPU being switched out.
The new 5.1.x features are described below.
New System Features
New features added to the 5.1 major release are:
•T1 HDSL WAN card based on PairGain HDSL module (802060 w/ 82100)
•10Base2 IP Router Card (883060)
•10BaseT IP Router Card (883160)
New features added to the 5.1.4 maintenance release are:
•Supports new FXO card, 813970, adding two new states machines, FXO_GS2 and
FXO_GS2-A, that improve the Ground Start function, while automatically maintaining
813960 functionality;
•Improves distinctive ring patterns;
•Corrects GS handshaking and GS OHD operation;
•Simplifies screen selection of OHD Timeout for FXO;
•Improves operation of Trunk Conditioning;
•Improves Loop Start and Ground Start ring detect circuits.
New features added to the 5.1.6 maintenance release are:
Host features:
•Answer Supervision has been added to FXS and FXO Loop start and Ground start
signaling types. The selection of Answer Supervision will always use Forward
Disconnect.
•The new FXS/FXO types are as follows:
•Lp-fa- Loop start with Answer Supervision and Forward Disconnect.
•Gs-fa- Ground start with Answer Supervision and Forward Disconnect.
