Cisco Systems IGX 8400 Series manual Configuring the Port Modes of the HDM Back Cards

Making Serial Data Connections

Configuring the Port Modes of the HDM Back Cards

Small jumper boards on the back card determine whether the mode of the port is DTE or DCE. The factory-set modes of the SDI ports alternate DCE with DTE. The steps that follow describe how to change the mode of the port. For the two modes, the rows on the back card jumper connector that are occupied by the jumper card are:

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DCE=1, 2, 4, and 5 (closest to the SDI faceplate)

DTE=2, 3, 5, and 6 (1 row away from the SDI faceplate)

Note A jumper board comes with an impedance of either 100 ohms or 200 ohms. For higher port speeds, the impedance is important if you have specified Y-cable redundancy. With Y-cable redundancy on a higher-speed connection, use the 200-ohm jumper board. With no Y-cable redundancy or when the port speed is relatively low, the 100-ohm jumper board is adequate.

To change the mode on a port to DTE, position the jumper board for that port as follows:

Caution To prevent damage to the SDI cards, wear a wrist strap and clip the strap to the enclosure.

Step 1 At the back of the IGX node, remove the SDI card, as follows:

•Loosen the captive mounting screws on both ends of the faceplate.

•Operate the card extractors, then slide the card out.

Step 2 Move the jumper board one row of pins away from the SDI faceplate. (See Figure 3-12.)For DTE mode, the jumper board should occupy rows 2, 3, 5, and 6.

If a port is in DTE mode and needs to be changed to DCE, plug the jumper board into the connector receptacle pin rows closest to the SDI faceplate. (See Figure 3-12.)These rows are 1, 2, 4, and 5.

Card Installation and Node Startup 3-25