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If the device's optical port type is SS1and SS2 the connecting method is as figure 4-2. The optical
port A and B both transmit and receive so the TX and RX are insignificant.
If the connecting is right, when receiving optical signal the LOS alarm indictors on the front panel
will be all off automatically.
Connecting E1 Interface
RCMS 2811-240FE-BL and RCMS 2811-480FE-BL devices: Using twisted-pair cable with RJ45
connectors to connect the 120Ω balanced interface on device. The line rule of RJ45 connector and
cable making method are shown in Appendix A.
RCMS2811-240FE and RCMS2811-480FE devices: Using CBL-E1-DB37F/16BNCM cable.
RCMS2811-120FE device:Using 75Ω unbalanced interface or 120Ω balanced interface but can not
use this two types of interface at the same time. When using 75Ω unbalanced interface the coaxial
cable with BNC male connector is needed. TX indicates the transmission of E1 signal and RX
indicates receiving of E1 signal. The making method of coaxial cable with BNC connector is shown
in Appendix A. When using 120Ω balanced interface the twisted pair cable with RJ45 connector is
needed.
Connecting Fast Ethernet Interface
Connect this device to relative network equipment by Ethernet cable with RJ45 connector. When the
device is on auto-negotiation mode the straight-through and cross-over cable are both available.
When the auto-negotiation is disabled the MDI/MDIX function is disabled correspondingly. So when
connecting to switch the straight-through cable is needed and when connecting to NIC and router the
cross-over cable is needed.
Connecting Network Management Port
To perform network management please link the RJ45 connector of Agent cable to LNK_UP
interface of device, and at the same time link the DB9 connector of Agent cable to serial port on PC.
When perform concatenating please connect LNK_DWN interface of upper device and LNK_UP
interface of lower device by RJ45-RJ45 cable.
Connecting V.35 interface on sub card
If there is V.35 sub card in accessory parts please insert it in device and connecting the V.35 port to
Figure 4-2 Optical Port Connecting Type 2
User Manual
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