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
100M
LNK
ACT
FDX
B
A
C
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
