3com MSR 20 Manual De Usuario
188
C
HAPTER
4: F
LEXIBLE
I
NTERFACE
C
ARDS
Connecting the Interface
Cable
c
CAUTION: By design, the FIC-1AT3 is protected against lightning strikes. But
when outdoor cabling is involved, you are recommended to add a special lightning
arrester at the input end of the E3/T3 cable for better protection.
when outdoor cabling is involved, you are recommended to add a special lightning
arrester at the input end of the E3/T3 cable for better protection.
Step 1: Connect the SMB connector of an E3/T3 cable to the Tx port on the
FIC-1AT3 and another end to the Rx port on another device.
FIC-1AT3 and another end to the Rx port on another device.
Step 2: Connect the SMB connector of another E3/T3 cable to the Rx port on the
FIC-1AT3 and another end to the Tx port on another device.
FIC-1AT3 and another end to the Tx port on another device.
Step 3: Check the behavior of the LINK LED on the FIC-1AT3 panel: OFF means
fault occurs on the line and the signal is out of synchronization. Check the line
status.
fault occurs on the line and the signal is out of synchronization. Check the line
status.
FIC-1ATM-OC3MM/FIC
-1ATM-OC3SM/
FIC-1ATM-OC3SML
-1ATM-OC3SM/
FIC-1ATM-OC3SML
Introduction
Three ATM fiber interface card options are available with your router:
■
1-port ATM 155 Mbps multi-mode fiber interface card (FIC-1ATM-OC3MM)
■
1-port ATM 155 Mbps single-mode fiber interface card (FIC-1ATM-OC3SM)
■
1-port ATM 155 Mbps single-mode long-haul fiber interface card
(FIC-1ATM-OC3SML)
(FIC-1ATM-OC3SML)
They provide the following functions:
■
Two frame formats: SDH STM-1 and SONET OC-3.
■
Scrambling in data transmission.
■
Line clock (when working as DTE interface), and internal clock (when working
as DCE interface)
as DCE interface)
■
Three test measures: local cell loopback, local payload loopback and remote
loopback.
loopback.
n
For the ATM interface configuration procedures, refer to H3C MSR 20/30/50 Series
Routers User Manual.
Routers User Manual.
Interface Attributes
The following table describes the interface attributes of the ATM cards.
Table 133 Interface attributes of the ATM cards
Attribute FIC-1ATM-OC3MM
FIC-1ATM-OC3SM FIC-1ATM-OC3SML
Fiber-optic connector
SC
Number of connectors
1
Interface standard
SONET OC-3/SDH STM-1
Interface rate
155 Mbps