NTD12 Dual-port DTI/PRI card description and installation Page 135 of 188
ISDN PRI Installation
Figure 34 - Clock Controller - Option 3
Clk 0
CC for CPU0
DDP1
Port 0
J1 Sec
J2 Pri
Clk 1
Port 1
Clk 0
Clk 1
CC for CPU1
J1 Sec
J2 Pri
Secondary Ref 1
Secondary Ref 2
Primary Ref 1
Both References from Port 1
J1 Ref 1
J2 Ref 2
Secondary Ref 1
Secondary Ref 2
Clk 0
DDP2
Port 0
Clk 1
Port 1
Clk 0
Clk 1
QPC720
A QPC720 may
be configured
as an alternative
to DDP 2
Primary Ref 2
Primary Reference
Secondary Reference