System synchronization commands for 7210 SAS-R6 and 7210 SAS-R12

config
    - system 
        - sync-if-timing
            - abort
            - begin
            - bits1
                - input
                    - no shutdown
                    - shutdown
                - interface-type {ds1 [{esf | sf}] | e1 [{pcm30crc | pcm31crc}]}
                - no interface-type
                - output
                    - line-length {110 | 220 | 330 | 440 | 550 | 660}
                    - no shutdown
                    - shutdown
                - no ql-override
                - ql-override {prs | stu | st2 | tnc | st3e | st3 | prc | ssua | ssub | sec}
                - ssm-bit sa-bit
            - commit
            - ref-order first second [third] [fourth]
            - no ref-order
            - ptp
                - ql-override {prs | stu | st2 | tnc | st3e | st3 | prc | ssua | ssub | sec}
                - no ql-override
                - [no] shutdown
            - ref1
                - ql-override {prs | stu | st2 | tnc | st3e | st3 | prc | ssua | ssub | sec | eec1 | eec2}
                - no ql-override
                - [no] shutdown
                - source-port port-id
                - no source-port
            - ref2
                - ql-override {prs | stu | st2 | tnc | st3e | st3 | prc | ssua | ssub | sec | eec1 | eec2}
                - no ql-override
                - [no] shutdown
                - source-port port-id
                - no source-port
            - [no] ql-selection
            - [no] revert