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Table 27
D-channel port address switch settings for PRI (Part 2 of 2)
Port Number
2
4
6
8
10
12
14
D-channel parameter downloading
2
Off
5
Off
7
Off
9
On
11
On
13
On
15
On
The system software automatically downloads 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 enabling 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)
ISDN Primary Rate Interface
DCH installation
Port Address Switch Settings
Off
On
On
Off
Off
On
On
Installation and Configuration
Page 115 of 396
On
Off
Off
Off
On
Off
Off
Off
On
Off
Off
Off
On
Off
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