Modular Multi-service Integrated Optical Transmission Multiplexer
User Manual
4
D. Power supply unit, with different power supply modules to be
selected based on the power size.
E: various service cards/boards are optional as per actual requirement,
however, the total capacity shall not exceed 8E1.
M
M
a
a
i
i
n
n
b
b
o
o
a
a
r
r
d
d
.
.
This circuit integrates 4-8 2048kbit/s HDB3 signals from
switch or sent out by PCM, the four lines of Ethernet data, the one line of
standard deployed user channel signal and order wire alarm etc into one
NRZ digital stream signal, encode it and export a NRZ signal to drive the
laser, and achieves the reverse process for the above mentioned part at
the same time.
O
O
p
p
t
t
i
i
c
c
a
a
l
l
I
I
n
n
t
t
e
e
r
r
f
f
a
a
c
c
e
e
U
U
n
n
i
i
t
t is to achieve the functions of 1+1 redundancy
backup of dual optical interface, priority-level switch, mandatory switch of
active/standby optical path, and so on. Switching mode for dual optical
interface: Dual transmission with optimal reception; Switching time for
optical pass: ≤ 50ms; Type of optical pass: One active and one standby
(the active pass is in operation when it’s normal, and the active pass
switches to standby pass when it is confronted with switching alarm levels
such as OPL, SYL, E3, and E6; The operation will finally return to the
active pass after a certain period of time when active pass is resumed to
normal condition); When the equipment is started, it is more advised to
have both local end and remote end operate in the A optical interface.
The optical interface applies an optical transmitting/receiving
integrated module of impact structure. It features high-power transmission,
high-sensitivity receiving and independent transmission and receiving.
E
E
t
t
h
h
e
e
r
r
n
n
e
e
t
t
i
i
n
n
t
t
e
e
r
r
f
f
a
a
c
c
e
e
U
U
n
n
i
i
t
t provides four lines of Ethernet and one line of
232/485 network management interface, one line of data channel (RS232).
In addition, it can also provide overhead alarm signals from the network
management or the data channel.
