Raisecom RCMS 2811 User Manual - page 8
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BL means E1 is 120Ωbalanced interface.
Note: As to the 4 E1 channels multiplexer, it has both balanced and unbalanced E1 interface so
it has no B option.
C: M, S1, S2, S3, SS1 and SS2
M means the optical port is dual-strand multi-mode and the transmission distance is 0-2km;
S1 means the optical port is dual-strand single mode and the transmission distance is 0-25km;
S2 means the optical port is dual-strand single mode and the transmission distance is 10-60km;
S3 means the optical port is dual-strand single mode and the transmission distance is 15-120km;
SS1 means the optical port is single strand single mode dual wavelength and the transmission
distance is 0-25km. The Tx wavelength of optical port A is 1310nm and port B is 1550nm;
SS2 means the optical port is single strand single mode dual wavelength and the transmission
distance is 10-50km. The Tx wavelength of optical port A is 1310nm and port B is 1550nm;
D: AC, DC48 and DC24.
AC means the power supply is AC;
DC48 means the power supply is DC -48V;
DC24 means the power supply is DC +24V.
Part number example:
RCMS 2811-240FE-BL-S1-AC
The specification of this device is: standalone 19 inches, 8 channels 120Ωbalanced E1 interfaces,
one Fast Ethernet interface, one extend slot ( can insert V.35 card), transmission distance is 0-25km,
two 220V AC power supplies.
RCMS2811 Series Model List
The RCMS series standalone dual optical port Ethernet multiplexer has 5 models as below table:
Part Number
Description
RCMS2811-240FE-BL
One 10/100Mbps auto-negotiation Ethernet port(RJ45), 8 E1 interfaces, 120
Ω
balanced (RJ45).
RCMS2811-480FE-BL
One 10/100Mbps auto-negotiation Ethernet port(RJ45), 16 E1 interfaces,
120Ωbalanced (RJ45).
RCMS2811-120FE
One 10/100Mbps auto-negotiation Ethernet port(RJ45),4 E1 interfaces, both
120Ωbalanced (RJ45) and 75Ωunbalanced (BNC).
RCMS2811-240FE
One 10/100Mbps auto-negotiation Ethernet port(RJ45), 8 E1 interfaces, 75
Ω
unbalanced (DB37).
RCMS2811-480FE
One 10/100Mbps auto-negotiation Ethernet port(RJ45), 16 E1 interfaces, 75
Ω
unbalanced (DB37).