Beijing RC902-FE4E1 User Manual
RC902-FE4E1 fast Ethernet to 4 E1converter
User guide
Beijing Raisecom Science & Technology Co., ltd
Content
Chapter 1 Overview ..............................................................................3
Chapter 2 Connection features..............................................................6
Chapter 3 Installation and test ..............................................................7
Chapter 4 Introduction of DIP-Switch..................................................8
Chapter 5 Troubleshooting .................................................................12
2
Chapter 1 Overview
1. Description
RC902- FE4E1, 10/100M auto-sensing Ethernet interface converter of Ethernet
to 4E1, is one product of RC series converters made by Beijing Raisecom Science &
Technology Co. ltd. It provides a simple solution to enable Ethernet access by using 4
E1 links for signal transmissions.
RC902-FE4E1 is modular device. It can provide central SNMP management
solution, when it is plugged in RC002-16 that is 16 slot chassis.
It can support remote management when it works in pair with RC901-FE4E1.
2. Specification
1）E1 interface：
RJ-45 (120 , balanced)
Bit rate: 2048Kbps±50ppm
Line code: HDB3
Compliance: ITU-T G.703,
ITU-T G.823
Other features:
Real-time BER detecting and E1links auto protection auto-reset
Resistance for drift of 512UI, the ability of counteraction of jitter and drift
Selectable BER threshold of link auto-reset: 10
-6
(default) or 10
-5
2）Fast Ethernet interface：
Interface: RJ-45, cat5/cat5e cables available, supports link distance up to 100m
Bit rate: selectable, Auto-sensing 10M/100Mbps or manual configuration
Duplex type: Full/Half duplex auto-negotiation or manual configuration
Compliance: IEEE 802.3、IEEE 802.3u
Other features:
Supports maximum frame size up to 1536 bytes
Supports IEEE 802.3d Spanning Tree, 802.1q VLAN
Supports 1K MAC address table, address filtering, improve efficiency of
E1 link
Supports Auto-MDI/MIDX auto-negotiation
Supports Link Fault Pass-though (LFP)
Provides 64Mbit SDRAM for reducing the network congestion.
3. Features
3
1）forward features
Maximum forward speed in each E1 link supports up to 1920Kbps
Maximum forward speed for 4 E1 link supports up to 1920×4=7680Kbps when fully
loaded
The forward bit rate is auto allocated, depending on the real-time status of E1 links.
2）Bandwidth auto-adjustment
RC902-FE4E1 supports 1~4 E1 links bandwidth auto-adjustment. If any of the E1
links disconnected, or when it is just back to normal from disconnecting, transmission
can be automatic achieved trough connecting E1 link and bandwidth can be adjusted
automatically, but at least 1 E1 link has to connect.
Every E1 link provides 2Mbps bandwidth. If 4 E1 links are working properly,
8M bandwidth can be provided in total. E1 link “working” means the two converters
have no alarm occurs in E1 link.
3）Fault Pass Through
RC901-FE4E1 provides Fault Pass Through (FPT) for special requirements, e.g.
which need Spanning Tree, superior switch network management record. The FPT
defined as:
If alarm occur on all 4 E1 links, then all the links disconnect, FPT function will
suspend the UTP port and disconnect the links with Ethernet switches and NIC, until
any of E1 link no alarm occurred, then system is back to default status.
FPT set “close” as default status, it is convenient for those customers who have
no special requirements. Please see the manual about the switch setting of the panel if
need it.
4. Front panel and LED indicator
Ethernet interface
E1 link
ETH
100MLNK
ACT
FDX
B
AC
D
A
B
C
D
E1 balanced
interface
Indicator of
Ethernet
Bolt
A、B、C、D 4 E1 links indicator color definitions:
Green（G）： Normal Status（LNK）
Red（R）： The lost of signal（LOS）
4
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