Alcatel-Lucent 7750 - Figure 19: MC-APS with ATM VLL Redundancy

Port Features
Page 98 7750 SR Interface Configuration Guide
Figure 19: MC-APS with ATM VLL Redundancy
In the application show in Figure 19, 2G and 3G cell sites are aggregated into a Tier 2 or Tier 3
hub site before being backhauled to a Tier 1 site where the radio network controller (RNC) which
terminates user calls is located. This application combines MC-APS on the RNC access side and
pseudowire redundancy and pseudowire switching on the core network side. pseudowire switching
is used in order to separate the routing domains between the access network and the core network.
OSSG145
GSM/GPRS
HSxPA
R99
ATM
Switch
E1 TDM
E1 ATM
E1 IMA ATM
E1 IMA ATM
Or xDSL
7750
SR-7
IP MPL Core
Layer 3 VPNs
Convergent
Packet Network
RNC Cluster
PW
T-PE
Active/Standby
Pseudo-wire
Multi-chassis
Protection
Pseudo-wire
Segments
T-PE
S-PE
7750
SR-7
7750
SR-7
7750
SR-7
7750
SR-7
PW
PW
PW
PW