Opbouw VC-2
De VC2 bestaat uit 9*12 = 108 bytes. Het eerste byte is V5 en bevat de VC2-POH:
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8
|
|---|
| BIP | BIP | FEBE | T | L1 | L2 | L3 | FERF
|
- BIP: two bit parity check
- FEBE: BIP-2 mismatch signal
- T: Path trace (optional)
- L1,L2,L3: Path signal label:
- 000: Unequiped
- 001: Equiped, non specific
- 010: Asynchronous, floating
- 011: Bit synchronous, floating
- 100: Byte synchronous, floating
- 101: equiped - unused
- 110: equiped - unused
- 111: equiped - unused (AIS)
- FERF: AIS-detected signal
Alhoewel ETSI geen C2 container heeft gedefinieerd, bestaat deze wel binnen CCITT /ITU-T,
en kan een signaal van 6.848Mbps vervoert worden.
C2 bevat VC-12
Een C2 container, kan drie VC12 bevatten
| | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12
|
| 1 | V5 | A1 | A2 | A3 | B1? | B2 | B3 | B4 | C1? | C2 | C3 | C4
|
| 2 | A4 | A5 | A6 | A7 | B5 | B6 | B7 | B8 | C5 | C6 | C7 | C8
|
| 3 | A8 | A9 | A10 | A11 | B9 | B10 | B11 | B12 | C9 | C10 | C11 | C12
|
| 4 | A12 | A13 | A14 | A15 | B13 | B14 | B15 | B16 | C13 | C14 | C15 | C16
|
| 5 | A16 | A17 | A18 | A19 | B17 | B18 | B19 | B20 | C17 | C18 | C19 | C20
|
| 6 | A20 | A21 | A22 | A23 | B21 | B22 | B23 | B24 | C21 | C22 | C23 | C24
|
| 7 | A24 | A25 | A26 | A27 | B25 | B26 | B27 | B28 | C25 | C26 | C27 | C28
|
| 8 | A28 | A29 | A30 | A31 | B29 | B30 | B31 | B32 | C29 | C30 | 31 | C32
|
| 9 | A32 | A33 | A34 | A35 | B33 | B34 | B35 | B36? | C33 | C34 | C35 | C36?
|