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342-86400-498PS
Issue 1.2
April 2012
Page 20
Copyright
GE Multilin Inc. 2010-2012
OC-48 Ring
E1000
E1000
E
1000
E
1000
E
1000
E
1000
E
1000
E
1000
Site A
Site H
Site G
Site F
Site E
Site D
Site C
Site B
TDM Pipe #4
(4 x STS-1)
TDM Pipe #1
(2 x STS-1)
TDM Pipe #2
(8 x STS-1)
TDM Pipe #3
(10 x STS-1)
OC-48 Ring
E1000
E1000
E
1000
E
1000
E
1000
E
1000
E
1000
E
1000
Site A
Site H
Site G
Site F
Site E
Site D
Site C
Site B
TDM Pipe #4
(4 x STS-1)
TDM Pipe #1
(2 x STS-1)
TDM Pipe #2
(8 x STS-1)
TDM Pipe #3
(10 x STS-1)
Figure 6:
Four TDM pipes accessed at every ETHER-1000 unit
The example in Figure 7 shows an application where each TDM pipe is accessed
by a different set of ETHER-1000 units. In particular, the TDM pipe #1 is
accessed at all sites, the TDM pipe #2 is accessed at sites A and E, the TDM
pipe #3 is accessed at sites C and G, while the TDM pipe #4 is accessed at sites
B, C, D, F, G and H. Note that the total amount of STS-1s for all 4 TDM pipes
can now exceed 24.
In Figure 8, there are two ETHER-1000 units at each of the sites A and E (e.g.
main and backup control centers), where potentially more than 1 Gb/s of
Ethernet traffic may need to be added/dropped. The TDM pipe #1 is accessed at
all sites, the TDM pipe #2 at sites A and E, the TDM pipe #3 at sites A, B, C, D
and E, and the TDM pipe #4 at sites A, E, F, G and H. Note that at sites A and E
the two ETHER-1000 units need to be connected to different CBW ports to allow
access to the required bandwidth (total of 44 STS-1s).