21 Large corporate network using circuit bonding
Data center
Central office
Corporate
Corporate
LAN
TDM voice
Kiosk
Circuit-
bonding
NxT1 Circuit-
bonding
hub
Voice network
??? Connect remote sites over copper T1s
??“ No fiber build cost included in customer pricing
??? Drop-in network element at each branch site
??? Standard T1 circuit provisioning and OAM&P
MSPP
Data center
T1
Ethernet NxT1
NxT1
NxT1
NxT1
LAN
TDM voice
Kiosk
Circuit-
bonding
NxT1
T1
Ethernet
Central office
Circuit-
bonding
hub
Voice network
MSPP
Corporate
294 Chapter 10
Ongoing Developments
Circuit bonding is based on a set of ITU-T standards approved several years ago. The
development of these standards was initiated by large telecommunications carriers
seeking to gain more benefits from their existing infrastructure and to provide a more
efficient transport environment for data traffic over existing SONET/SDH-based transport
system. The following table shows the standards involved:
ITU Standard Description
G.7041/Y.1303 Generic framing procedure (GFP)
G.7043/Y.1343 Virtual Concatenation of Plesiochronous Digital Hierarchy (PDH) signals
G.
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