Alcatel-Lucent 7750 SR OS - Figure 16: MC-APS with ATM VLL Redundancy

Interface Configuration
7750 SR OS Interface Configuration Guide Page 89
An example of a customer application in the mobile market is displayed in Figure 16.
Figure 16: MC-APS with ATM VLL Redundancy
In the application show in Figure 16, 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
OSSG145-7710
GSM/GPRS
HSxPA
R99
ATM
Switch
E1 TDM
E1 ATM
E1 IMA ATM
E1 IMA ATM
Or xDSL
IP MPL Core
Layer 3 VPNs
Convergent
Packet Network
RNC Cluster
T-PE
Active/Standby
Pseudo-wire
Multi-chassis
Protection
Pseudo-wire
Segments
T-PE
S-PE
7710
7710
PW
PW
7710
PW
7710
7710
PW
PW