Services
7750 SR OS Services Guide Page 73
Network Migration Caveats
CDMA 2000 EVDO offers Ethernet or T1 interfaces at base stations.
GSM A bis interface is TDM-based and carried over E1/T1 links.
Circuit emulation is required for Ethernet transport.
UMTS R5 Has an all-IP access network option.
Suitable for carrier Ethernet, depending on base station configuration.
UMTS R99 ATM connections are carried over E1/T1 IMA links.
Circuit emulation or pseudowires are required for Ethernet transport.
Mobile Core Towards IP/Ethernet
Split MSC architecture with IP/Ethernet interfaces.
IP/Ethernet links between media gateways and MSC servers.
For more information about Circuit Emulation Services and the Mobile Infrastructure, refer to
Circuit Emulation Services (Cpipe) on page 185.
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