Alcatel-Lucent 9500 MXC User Manual page 516

Chapter 9. Circuits
Vol. IV-9-8
• 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.
Example Circuit Requirements for a Ring
Figure 9-5.
WEST
DAC 155oM
63xE1
(18 pass-through & 4 drop-insert)
22xE1
Fiber
8x2 Mbps
33xE1
33xE1 unallocated Pt-to-Pt
West ports (31-63)
4xE1 drop-insert
on ring ports 12-15
Rx
DAC 16x
To map out circuits to be configured on a ring use the planning sheets in
Planning a Ring Network, Appendix A.
9500 MXC Node
22xE1 Ring on ports 1-22
Tx C2 C1
P4
Spanning-tree
4xE1
switch
LAN
EAST
RAC 30
32xE1
22xE1
8x2 Mbps
2xE1
2xE1 unallocated Pt-to-Pt
East ports (31-32)
16 Mbps Pt-to-Pt on
East ports 23-30
16 Mbps Pt-to-Pt on
West ports 23-30
DAC ES
P1
Ethernet ports
Alcatel-Lucent