Cyan Z-Series Engineering and Planning Guide Release 5.0
Page 134 © 2013 Cyan, Inc. – All Rights Reserved. 700-0023-05-00 Rev. 1
2.19 Line Card SYNC LED
A Z-Series line card SYNC LED indicates the state of the phase-locked loop (PLL) synchronization to the
shelf active controller card (Z77 BOSS/BOSS2 or Z22/Z33 CEMi). The line card PLL can be locked to the
clock coming from the active controller card or it can be in Hold-over or Free-run mode if a
BOSS/BOSS2/CEMi card is not available.
The SYNC LED color assignments for the DTM-8, DTM-8G, DTM-100G, FLX-216i, PME-412,
PME-216i, PSW-10G10, PSW-618, and MSE-1482 line cards are as follows:
• Locked: Solid
BLUE
• Hold-over: Solid
AMBER
• Free-run: Off
• Acquiring (tracking): Blinking
BLUE
Note that Z-Series line cards control their SYNC LEDs even if the timing subsystem (TSS) is not
provisioned. For example, the TSS on the BOSS/CEM controller cards can be running in Free-run mode
(indicated by the BOSS/BOSS2/CEMi SYNC LED being OFF), but a line card SYNC LED is solid
BLUE to
indicate it is locked to the active BOSS/BOSS2/CEMi controller card clock.
Note: In this Release, the PSW-10G10 and PSW-618 line cards are only supported in the Z77 platform.
MSE-1482 Line Card SYNC LED
MSE-1482 line card SYNC LED indications are slightly dissimilar from other Z-Series line cards due to the
differences in operation. MSE-1482 line cards are designed to operate in pairs where one MSE-1482 line
card is "active" and the other MSE-1482 line card in the pair is "standby." In this configuration, the standby
MSE-1482 line card recovers its clock from the active MSE-1482 line card. The active MSE-1482 line card
recovers its clock from the active BOSS/BOSS2/CEMi controller card.
The SYNC LED on the active MSE-1482 line card indicates whether the active MSE-1482 line card is
locked to the active BOSS/CEMi controller card or in Hold-over or Free-run mode. When the active
MSE-1482 line card PLL is locked to the active BOSS/BOSS2/CEMi controller card, the active MSE-1482
line card SYNC LED is solid
BLUE.
The SYNC LED on the standby MSE-1482 line card indicates whether the standby MSE-1482 line card is
locked to the active MSE-1482 line card (its peer) or in Hold-over or Free-run mode. When the standby
MSE-1482 line card PLL is locked to the active MSE-1482 line card, the standby MSE-1482 line card
SYNC LED is solid
BLUE.
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