Modem-Converter E1-L/S
© 2006 Cronyx
Remote Link Loopback
Remote link loopback is
enabled;
LINK STATE indicator
flashes in double flashes
Local link loopback is
enabled by remote request;
LINK STATE indicator
flashes regularly
CD
Carrier Ok
RXD
DSR
«On»
CTS
f(CD, RTS)
Local
device
Remote
device
DTE
RTS
E1 link
DTE
TXD
Carrier Ok
CD
«Off»
DSR
f(CD, RTS) CTS
RTS
RXD
TXD
Digital Port Loopback
Digital port loopback is enabled;
PORT STATE indicator flashes
regularly
CD
«On»
RXD
DSR
«On»
CTS
f(CD, RTS)
Normal state
Local
device
Remote
device
DTE
RTS
E1 link
DTE
TXD
Carrier Ok
CD
«On»
DSR
f(CD, RTS) CTS
RTS
RXD
TXD
3.5. Built-in BER Tester
The device is equipped with a built-in BER tester, which allows to measure the error
rates in the E1 link. Measurements are performed using pseudo-random code accord-
ing to the ITU-T Recommendation O.151 (pattern length equals to 2
15
-1=32767 bits),
Summary of Contents for E1 - L/S
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