The vast majority of the businesses, however,
lack fiber connectivity and can make use of circuit-bonding solutions.
Highly Efficient
The current transport network is designed for TDM voice traffic. As demonstrated in
Figure 10.14, it has very inflexible and rigid TDM increments. For example, from a T1
Figure 10.13 Prediction for the number if businesses requiring data connectivity
Number of Circuits (Millions)
2003
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
2004 2005 2006
Fiber served businesses Copper only businesses
TDM: Circuit Bonding 289
(1.544 Mbps), the next bandwidth increment is a DS3 (45 Mbps). On the other hand,
Ethernet has a much more flexible and granular bandwidth increments. Circuit bonding
can help to bond smaller TDM pipes together so it will match the smaller Ethernet
bandwidth granularity much better. In this way, circuit bonding helps reduce the cost of
leased circuits and the cost of providing these services by matching customer requirements
with the appropriate transport pipe.
The following table shows some examples of the efficiency gained by using bonded
circuits.
Customer
Requirements in Mbps
Current
Provisioning Method
Circuit
Bonded Pipe
Bandwidth
Provisioned
Bandwidth
Saved
Percentage
Bandwidth Saved
10 Mbps DS3??“45 Mbps 7 ?— T1 10.
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