3Com 3C13886 Installation Guide - Page 133

Internal DIP Switch, Connecting the Interface Cable, Table 4-12, ROUTER 4-PORT CE1/PRI FIC

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3Com Router Module Guide Chapter 4 In addition, you are available with 75-ohm-to-120-ohm adapters. 4.4.5 Internal DIP Switch The FIC-E1 and the FIC-E1-F cards provide internal DIP switches, the setting of which decides interface impedance and the grounding mode. Table 4-12 DIP switches and E1 interfaces of the FIC-E1/FIC-E1-F cards Card ROUTER 4-PORT CE1/PRI FIC DIP switch S1 S2 S3 S4 Controlled E1 interface Interfa Interfa Interfa Interfa ce 0 ce 1 ce 2 ce 3 4.4.6 Connecting the Interface Cable Caution: Before you connect a port, read its label carefully; a wrong connection can cause damages to the interface card and even the device. If outdoor cabling is involved, consider to install a special lightning arrester at the input end of the interface cable for better lightning protection. I. Connecting the interface cable of the ROUTER 4-PORT CE1/PRI FIC Step 1: Identify type of the E1 cable, and set the DIP switch for the to-be-connected E1/FE1 port correctly. Step 2: Plug the DB-15 connector of the E1 cable into the E1/FE1 port on the card. Step 3: Connect the other end of the E1 cable to another device. 1) When using a 75-ohm unbalanced coaxial cable, do the following: z If no cable extension is needed, directly connect the BNC connector of the cable to the device. z If cable extension is needed, connect the BNC connector of the cable to a coaxial connector, and then connect the other end of the coaxial connector to the device using a 75-ohm E1 trunk cable. 4-24

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3Com Router Module Guide
Chapter 4
4-24
In addition, you are available with 75-ohm-to-120-ohm adapters.
4.4.5
Internal DIP Switch
The FIC-E1 and the FIC-E1-F cards provide internal DIP switches, the setting of which
decides interface impedance and the grounding mode.
Table 4-12
DIP switches and E1 interfaces of the FIC-E1/FIC-E1-F cards
Card
ROUTER 4-PORT CE1/PRI FIC
DIP switch
S1
S2
S3
S4
Controlled E1
interface
Interfa
ce 0
Interfa
ce 1
Interfa
ce 2
Interfa
ce 3
4.4.6
Connecting the Interface Cable
Caution:
Before you connect a port, read its label carefully; a wrong connection can cause
damages to the interface card and even the device.
If outdoor cabling is involved, consider to install a special lightning arrester at the input
end of the interface cable for better lightning protection.
I. Connecting the interface cable of the ROUTER 4-PORT CE1/PRI FIC
Step 1: Identify type of the E1 cable, and set the DIP switch for the to-be-connected
E1/FE1 port correctly.
Step 2: Plug the DB-15 connector of the E1 cable into the E1/FE1 port on the card.
Step 3: Connect the other end of the E1 cable to another device.
1)
When using a 75-ohm unbalanced coaxial cable, do the following:
If no cable extension is needed, directly connect the BNC connector of the cable
to the device.
If cable extension is needed, connect the BNC connector of the cable to a coaxial
connector, and then connect the other end of the coaxial connector to the device
using a 75-ohm E1 trunk cable.