Feature Explorer AI 
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| Feature hierarchy | Feature Name |
|---|---|
| SONET/SDH Interfaces / | Cisco High-Level Data Link Control encapsulation |
| SONET/SDH Interfaces / | Class-of-service features on the SONET/SDH OC3/STM1 (Multi-Rate) MICs with SFP |
| SONET/SDH Interfaces / | High-Level Data Link Control (HDLC) |
| SONET/SDH Interfaces / | Per-MIC SONET/SDH framing |
| SONET/SDH Interfaces / | SONET or SDH framing |
| SONET/SDH Interfaces / | SONET/SDH |
| SONET/SDH Interfaces / | SONET/SDH APS using container interfaces |
| SONET/SDH Interfaces / | Support for Layer 2 features on the SONET/SDH OC3/STM1 (Multi-Rate) MICs with SFP |
| SONET/SDH Interfaces / | Support for channelized SONET/SDH OC3/STM1 (Multi-Rate) MIC with SFP |
| SONET/SDH Interfaces / | Support for configuring HDLC idle cycle flag |
| SONET/SDH Interfaces / | Support for configuring High-Level Data Link Control (HDLC) payload scrambling |
| SONET/SDH Interfaces / | Support for crc-16 and crc-32 HDLC CRC checking modes |