Glossary
876 FTBx-88000 Series
OBSAI
Application Layer: Provides message sampling and mapping based on
payload type (ex: WCDMA/FDD, LTE, GSM/EDGE and 802.16 also
known as Wi-Max).
Transport Layer: End-to-End delivery message including routing based
on RP3 Address defined in the messages.
Data Link Layer:
Message framing and link synchronization.
Scrambling/Descrambling (6.144G only).
Physical Layer:
8B/10B Coding/Decoding (or 10B/8B Coding).
Create serial bit stream.
Transmit/Receive bit stream on the interface..
Physical Interface
OBSAI offers 4 rates based on a multiple of 768 Mbit/s. All OBSAI rates use
8B/10B line coding. Scrambling is mandatory for the 6.1Gbit/s rate. When
using OBSAI with Framed L2, the line rate and scrambling are normally
negotiated following the operation of the TX and RX state machines at the
BTS and RRH nodes.
Multiple (i) Rate Line Coding Scrambling
1x 768 Mbit/s 8B/10B None
2x 1.536 Gbit/s
4x 3.072 Gbit/s
8x 6.144 Gbit/s Configurable (enabled by default)
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