DCHI installation for all systems
Page 91 of 188
ISDN PRI Installation
D-channel parameter downloading
Beginning with X11 release 14, system upgrades often contain changes to
D-channel parameters. The Meridian 1 software automatically downloads the
new parameters to each D-channel Interface (DCHI) circuit card upon
SYSLOAD. When this occurs, the D-channel is temporarily disabled and
then automatically reenabled.
Three situations require manual disabling and reenabling of each DCHI to
ensure parameter downloading:
— Performing a parallel load and switching over to the second CPU
— Following an alarm condition for the T1 loop carrying the D-channel (but
the D-channel is still operational)
— Following SYSLOAD when using ISDN Signaling Link (ISL)