The 8E1 to ethernet converter is the IP ethernet over TDM
converter, which supports the conversion from MAC frames to 1 ?8 E1
lines. The maximum bit rate is 15.8Mbps (8E1 lines). The 8E1
converter not only provides alarms and status of the E1 line but
also Ethernet interface together with advanced management
functions, such as, throughput statistic of the Ethernet, but also
supports the Unification Network Management via SNMP and GUI .
Compliant to international standards, the device can communicate
with products from other manufacturers adopting the same standards.
Supports automatic removal and recovery of E1 channels that used
for carrying payload. The E1 channels that have urgent alarm, such
as LOS and LOF, or the Bit Error Rate (BER) exceeds 1E-6, are
removed automatically, and during this period, some Ethernet
packets may be lost; It will be resumed when the fault dismisses .
Supports the embedded E1 BER Tester function, to detect any E1
channel of 4 channels. When the embedded E1 BER Tester is used via
CLI command, the particular E1 channel on testing mode can not
convey E1 service, while the other E1 channels are not affected by
the BER test.
The differential delay between any two of the 4 E1 can be up to
220ms; when the factual differential delay exceeds 220ms, alarm is
generated and Ethernet is cut off.
Jitter tolerance and jitter transfer characteristic compliant to
n Ethernet interface
Provides up to 4 shared Ethernet interfaces.
1024 MAC address table and 5-minute aging time.
Accepts frames with length between 64 and 1916 bytes (otherwise
VLAN function based on tags compliant to IEE 802.1Q.
Throughout statistic of the Ethernet packets based on port, such as
Configurable pause flow control .
Optional optical Ethernet interface compliant to IEEE 802.3u
100BASE-FX standard (can communicate with remote optical
transceiver) and electrical Ethernet interface compliant to IEEE
802.3u 100 BASE-TX standard.
n Management interface
n Timing mode
Optional local timing mode and tracing E1 line (set by GUI).
The source of tracing E1 line can be switched according to the
signal quality. For instance, the system is set as tracing the
first E1 link, when some malfunction occurs to it (i.e., urgent
alarm LOS/AIS/LOF/LOMF or the signal is looped back), the system
will automatically change to tracing the second E1 link; when the
fault disappear, the system will be re-tracing the first E1 link.
n Compliant to ITU-T standards
GFP-F encapsulation recommendation G.7041.
Virtual concatenation(VCAT) and Link Capacity Adjustment Scheme
(LCAS) recommendation G.7042.
Ethernet to nxE1 mapping recommendation G.7043.
Ethernet to single E1 mapping recommendation G.8040.
n Bandwidth is increased without damaging the Ethernet data, and
can be decreased no injury through management.
n The E1s in the local and remote sides can be arranged
arbitrarily, such as, the remote E1 port 1 can communicate with
local E1 port 3.
n Supports bandwidth unbalanced usage ?when some E1s cannot work
properly (i.e. the bandwidth of the sending and receiving can be
2E1 and 3E1 respectively ).
n Provides the E1 connection-ship between local and remote system
(accessed via GUI).
n E1 tributary signal loopback automatic detect and cut off; when
some E1 signal is detected as looped back, it will be not employed
for carrying payload temporarily, and when the loopback is broken,
this E1 will resume to be used.
n Remote/local E1 loopback function will be convenient for E1
line(transmission system included) testing .
n Complete alarm which is selectable to be shown between local and
n support AC 220V power or DC 48V power or double AC+DC power
n Single-board design with small dimension, 1 U high and low power
GUI Management Screen: