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

Table 2-45 shows the front and back cards supported for the high-speed data module (HDM).

The HDM consists of an HDM front card and a synchronous data interface (SDI) back card. There are

three different models of the SDI back card, depending on the desired interface type (see Table 2-45 and

Table 2-47). Depending on the chassis type, the IGX can support up to 29 HDMs for up to

232 full-duplex data connections.

The HDM supports the following features:

• Support for four high-speed synchronous data channels

• Separately-configurable channels, with configurable clocking, data rate, and interface type

• Support for multiple protocols (asynchronous, binary synchronous, and bit synchronous)

• Port speeds from 1.2 kbps up to 1344 kbps

• Configuration and monitoring of control leads

• Support for loopback testing

• Support for Y-cable redundancy

HDM Front Card

The HDM front card faceplate shown in Figure 2-36 has both LEDs and control buttons to assist with

loopback control and signal monitoring tasks. See Table 2-46 for more information about the HDM front

card faceplate LEDs and the “HDM Control Buttons” section on page 2-78 for more information on

HDM front card faceplate control buttons.

Table 2-45 High-Speed Data Module Front and Back Cards

Front Card Back Cards

HDM SDI, EIA/TIA-449 (for X.21 also)

SDI, EIA/TIA-232D (for V.24 also)

SDI, V.35