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3-5
Clear Channel 6-Port T3 (DS3) Line Card Installation and Configuration
OL-3449-02
Chapter 3 Removing and Installing Line Cards
Connecting a T3 SMB Cable
Connecting a T3 SMB Cable
On a 6T3 line card, you can use six T3 SMB cables (one for each T3 link).
Each T3 link requires separate receive and transmit connections to your external T3 equipment.
To connect the T3 SMB cables to the 6T3 line card, follow these steps:
Step 1 Attach the T3 SMB cables directly to the SMB ports on the 6T3 line card. Attach the SMB ends of the
cable to the ports labeled TX and RX. (See Figure 3-2.)
Note If you build your own cables, we strongly recommend that you fasten together your transmit and receive
cables along their entire length, as shown in Figure 3-2. Doing so reduces the effects of EMI. You can
use shielded jacketing or tubing for this purpose.
Figure 3-2 Attaching T3 SMB Cables to a 6T3 Line Card
Caution To prevent system problems and to maintain the proper cable connection sequences, connect the receive
and transmit ports on your 6T3 line card as indicated in Step 2.
Step 2 Attach the BNC ends of your T3 SMB cables to your external T3 equipment as follows:
• Attach the T3 cable from the 6T3 line card TX port to the RX port on your external T3 equipment.
• Attach the T3 cable from the 6T3 line card RX port to the TX port on your external T3 equipment.
TX
LN
K
R
X
0
7300-6T3
6-PORT T3 DSU
STATUS
OIR
TX
LN
K
R
X
1
TX
LN
K
R
X
2
TX
LN
K
R
X
3
T
X
LN
K
R
X
4
TX
LN
K
R
X
5
66946
To TX
To RX