3com MSR 20-20 사용자 설명서
110
C
HAPTER
3: M
ULTIFUNCTIONAL
I
NTERFACE
M
ODULES
Interface Cable
External ports provided by MIM-1AT3 module are two SMB sockets respectively
functioning as Tx end and Rx end for transmitting data and receiving data. The
ports work in 75-ohm unbalanced transmission mode and are connected to the
peer device using a pair of 75-ohm unbalanced coaxial cables as shown in
Figure 121. Several cable length options are available.
functioning as Tx end and Rx end for transmitting data and receiving data. The
ports work in 75-ohm unbalanced transmission mode and are connected to the
peer device using a pair of 75-ohm unbalanced coaxial cables as shown in
Figure 121. Several cable length options are available.
n
MIM-1AE3 and MIM-1AT3 modules use the same type of cables for connection,
which are called E3/T3 cables in this manual.
which are called E3/T3 cables in this manual.
Connecting the Interface
Cable
c
CAUTION: Some measures have been taken to protect MIM-1AT3 module. To
achieve better lightning protection effects, however, you are recommended to add
a special lightning arrester at the input end of the E3/T3 cable when leading it to
the outdoors.
achieve better lightning protection effects, however, you are recommended to add
a special lightning arrester at the input end of the E3/T3 cable when leading it to
the outdoors.
Step 1: Connect the SMB connector of an E3/T3 cable to the Tx port of MIM-1AT3
module and another end to the Rx port on the device to be connected;
module and another end to the Rx port on the device to be connected;
Step 2: Connect the SMB connector of another E3/T3 cable to the Rx port of
MIM-1AT3 module and another end to the Tx port on the device to be connected;
MIM-1AT3 module and another end to the Tx port on the device to be connected;
Step 3: Check the behavior of the LINK LED on the MIM-1AT3 panel. It is OFF
when fault has occurred on the link and signal is out of synchronization. In this
case, please check the link.
when fault has occurred on the link and signal is out of synchronization. In this
case, please check the link.
MIM-1POS Module
Introduction
MIM-1POS represents the 1-port SDH/SONET interface module. It supports
interface rates up to 155.52 Mbps (STM-1/OC-3).
interface rates up to 155.52 Mbps (STM-1/OC-3).
The MIM-1POS can use the protocols such as PPP, Frame Relay and HDLC at the
data link layer and IP at the network layer. It allows direct transmission of packets
over SONET/SDH. It supports:
data link layer and IP at the network layer. It allows direct transmission of packets
over SONET/SDH. It supports:
■
Four SFP types: multi-mode short-haul (1310 nm), single mode medium-haul
(1310 nm), single mode long-haul (1310 nm), and single-mode ultra-long haul
(1550 nm).
(1310 nm), single mode long-haul (1310 nm), and single-mode ultra-long haul
(1550 nm).
■
155.52 Mbps fractional interface
Table 70 Description of the LEDs on the MIM-1AT3 panel
LED Description
LINK
OFF means no link is present; ON
means a link is present.
means a link is present.
ACT
OFF means no data is being
transmitted or received; blinking
means data is being received or/and
transmitted.
transmitted or received; blinking
means data is being received or/and
transmitted.