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Cisco ONS 15310-MA SDH Reference Manual, Release 9.1 and Release 9.2
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Chapter 2 Card Reference
ML-100T-8 Card
Note Although the VC4 frames are multiplexed into an VC4-4c frame, the frame carries at most an VC4-2c
payload, leaving half of the VC4-4c bandwidth free.
In the egress direction (SDH-to-Ethernet), the mux/demux extracts the first and second VC4 SPEs from
the VC4-4 frame it receives from the BTC-48 before sending it to the POS mapper. The VC4 SDH SPEs
carrying GFP or PPP/HDLC encapsulated Ethernet frames are then extracted and buffered in the POS
mapper external memory. This memory is used for providing alignment and differential delay
compensation for the received high-order VCAT payloads. After alignment and delay compensation
have been done, the Ethernet frames are decapsulated with one of the framing protocols (GFP or
PPP/HDLC). Decapsulated Ethernet frames are then passed onto the network processor for QoS
queuing, traffic scheduling, packet switching, and multiplexing. The network processor switches the
frame to one of the corresponding PHY channels and then onto the Ethernet port for transmission to the
external clients.
2.5.3 ML-100T-8 Card-Level Indicators
The ML-100T-8 card faceplate has two card-level LED indicators, described in Table 2 -8.
2.5.4 ML-100T-8 Port-Level Indicators
The ML-100T-8 card has two LEDs embedded into each of the eight Ethernet port RJ-45 connectors.
The LEDs are described in Tabl e 2- 9.
Table 2-8 ML-100T-8 Card-Level Indicators
Card-Level LEDs Description
SF LED (Red) The red FAIL LED indicates that the card processor is not ready or that a
catastrophic software failure occurred on the ML-100T-8 card. As part of the
boot sequence, the FAIL LED blinks until the software deems the card
operational, then it turns off.
ACT LED (Green) The ACT LED provides the operational status of the ML-100T-8. When the
ACT LED is green, it indicates that the ML-100T-8 card is active and the
software is operational; otherwise, it is off.
Table 2-9 ML-100T-8 Port-Level Indicators
Port-Level Indicators Description
ACT LED (Amber) A steady amber LED indicates a link is detected, but there is an issue
inhibiting traffic. A blinking amber LED means traffic is flowing.
LINK LED (Green) A steady green LED indicates that a link is detected, but there is no
traffic. A blinking green LED flashes at a rate proportional to the level
of traffic being received and transmitted over the port.
Both ACT and LINK LED
OFF
Unlit LEDs indicate no traffic.