Specifications

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Cisco IGX 8400 Series Provisioning Guide, Release 9.3.3 and Later Releases
OL-1166-04
Chapter 2 Cisco IGX 8400 Series Cards
High-Speed Data Module
HDM Control Buttons
The HDM front card faceplate has two control buttons used to assist monitoring tasks (see Figure 2-36).
The scroll control button allows you to select one of the four data ports on the SDI back card for
monitoring. Information displayed by the front card faceplate LEDs applies to the selected back card
data port only.
For example, if you use the scroll control button to select data port 1 (which has a local loopback
present), the port 1 and LL LEDs will come on. If you use the scroll control button to select data port 4
(which has a transmit data signal), the port 4 and TXD LEDs will come on.
The loopback control button allows you to select one of three different loopback states (no loopback,
local loopback, or remote loopback) for the selected port. For example, if port 1 is lit and you use the
loopback control button to specify local loopback, the port under test LED and the LL LED will become
lit to indicate that data port 1 now has a local loopback present.
SDI Back Card
The SDI back card provides data connections for the HDM front card. Each SDI back card model has
four connectors with the connector type depending on the interface supported by the back card (see
Table 2-47). Each connector provides the physical interface for one data ports. These data ports
correspond to the Port LEDs of the same number on the HDM front card faceplate (see Figure 2-36).
Each port is separately configurable.
SDI Clocking
You can use three different clocking modes on the SDI back card for clocking transmit data and receive
data. Since the SDI back card can operate as either a DCE or a DTE, six different clocking combinations
are possible (see Figure 2-37 and Figure 2-38).
Table 2-47 SDI Back Card Models by Interface and Connector Types
SDI Back Card Interface Type Physical Connector
SDI,
EIA/TIA-232D
EIA/TIA-232D,
V.2 4
4 DB-25 subminiature (female)
SDI,
EIA/TIA-449
EIA/TIA-449,
X.21
4 DB-37 subminiature (female)
SDI, V.35 V.35 34-pin MRAC type (winchester, female)