Chapter 9. Circuits
Vol. IV-9-8 Alcatel-Lucent
• The maximum possible ring-protected capacity on the node is therefore 32xE1
(the lesser of the two capacities).
• Actual ring-protection capacity required is 22xE1. This leaves 41xE1
non-ring-protected capacity towards the west, and 10xE1 towards the east.
• The DAC 16x is configured for 4xE1 drop-insert circuits from the ring, which
means there are 18xE1 pass-through circuits.
• The DAC ES is configured for 8xE1 (8x 2.048 Mbps) to support a 16 Mbps
LAN via a spanning-tree switch; 8x2 Mbps point-to-point circuits towards the
west, and 8x2 Mbps east.
• This leaves spare point-to-point capacity of 33xE1 towards the west, and 2xE1
east.
The circuits screen for this example is shown in Figure 9-6 on page 9-9.
Figure 9-5. Example Circuit Requirements for a Ring
WEST
DAC 155oM
63xE1
EAST
RAC 30
32xE1
4xE1 drop-insert
on ring ports 12-15
DAC 16x
22xE1 Ring on ports 1-22
(18 pass-through & 4 drop-insert)
Rx Tx
C1C2
P1P4
16 Mbps Pt-to-Pt on
East ports 23-30
16 Mbps Pt-to-Pt on
West ports 23-30
DAC ES
2xE1 unallocated Pt-to-Pt
East ports (31-32)
33xE1 unallocated Pt-to-Pt
West ports (31-63)
Ethernet ports
Spanning-tree
switch
LAN
4xE1
Fiber
22xE1
22xE1
8x2 Mbps
8x2 Mbps
33xE1
2xE1
9500 MXC Node
To map out circuits to be configured on a ring use the planning sheets in
Planning a Ring Network, Appendix A.
To Next Page
Loading...
