156 CHAPTER 7: POS INTERFACE CONFIGURATION COMMANDS
Description Use the flag command to set the SONET/SDH overhead bytes.
Use the undo flag { j0 | j1 } sdh command to restore the default SONET/SDH
overhead bytes.
By default, the default SDH overhead bytes are used.
The default overhead bytes are as1 follows.
■c2: 0x16
■j0 (SDH): 15 hexadecimal numbers, each of which has the value of 0x0
■j1 (SDH): 15 hexadecimal numbers, each of which has the value of 0x0
■j0 (SONET): 0x01
■j1 (SONET): 62 hexadecimal numbers, each of which has the value of 0x0
Inconsistency between the c2 and j0 settings of a sending POS interface and the
receiving POS interface causes alarms.
Related command: display interface pos.
Example # Set the SDH overhead byte J0 of POS1/0 interface.
<Sysname> system-view
[Sysname] interface pos 1/0
[Sysname-Pos1/0] flag j0 sdh ff
frame-format
Syntax frame-format { sdh | sonet }
undo frame-format
View POS interface view
Parameter sdh: Sets framing format to synchronous digital hierarchy (SDH).
sonet: Sets framing format to synchronous optical network (SONET).
Description Use the frame-format command to configure framing on the POS interface.
Use the undo frame-format command to restore the default, that is, SDH.
Example # Set the framing format on interface POS 1/0 to SDH.
<Sysname> system-view
[Sysname] interface pos 1/0
[Sysname-Pos1/0] frame-format sdh