Zte ZXC10 CBTS O1, Technical Manual

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Chapter 1 - System Overview
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Adopt the IP-based cUDP/PPPMux/MultilinkPPP for its Abis interface for
higher transmission efficiency at a lower cost.
Use the multi-frequency digital intermediate frequency technology to
make do with less RF modules.
Support transmission diversity, intelligent antenna and linear pre-
distortion amplifier.
High channel efficiency.
Support different configurations such as 4-carrier 3-sector, 2-carrier 6-
sector and 1-carrier 12-sector.
Adopt high reuse-efficiency transmission system between its BDS and
RFS subsystems and data of 24 carrier sectors can be transmitted over
one fibre pair.
Support dynamic downl oading of board softw are, making upgrade and
maintenance convenient.
High Reliability
Advanced EMC (Electromagnetic Compatibility) and EMI
(Electromagnetic Interference) design.
The RRFS supports ring networking through fibres and link backup for
switchover when necessary. Link switchover is independent of board
switchover to enhance transmission reliability.
The clock system is compatible with the GPS and GLONASS system.
All important boards are configured in 1+1 hot backup mode.
The GCM provides reliable clock for a short term and ensures the
locked status of clock during 72 hours after the GPS synchronous
signal is lost.
Flexible Networking
Abis interface for flexible networking:
Support Ethernet direct connection for when BTS and BSC are installed
in the same room or not far from each other.
Support star, chain, tree and ring networking.
Support 75 Ω / 120 Ω E1 interface, 100 Ω T1 interface, and built-in
SDH transmission interface.
The BTS can use 220V AC or –48V DC and it has the built-in primary
power supply.
Smooth Expansion and Upgrade
All boards support hot swapping, convenient for online upgrade and
maintenance.
The Channel Module (CHM) can be configured easily as a subcard.