System information

FCD 901 48
Issue R2A, 07.2009
XMP1 Release 5.5 System Description
STM-4 interface 622 Mbit/s optical
Page 9-6 Proprietary Information Aastra
9.5.3 STM-4 interface 622 Mbit/s optical
Laser class
Laser class 1
STM-4 interface acc. to ITU-T G.957 and G.958
Transmission rate 622 080 kbit/s
Code binary NRZ (optical interface)
Interfaces on the SCU module max. 2
Connector type LC (SFP module)
9.5.4 2 Mbit/s equipment interface
Interface characteristics to ITU-T G.703
Impedance, switchable
120 Ohms eff. (bal.) or 75 Ohms coaxial
(unbal.), highly resistive
Bit rate (2048
5 x 10
-5
) kbit/s
Period duration T
0
488 ns
Signal code HDB3
Tx signal shape at F1out approx. rectangle
Tx signal amplitude at F1out US
0
3 V 10% across 120 Ohms or
2.37 V
10% across 75 Ohms
Permissible Rx signal attenuation at F1in with a
center frequency of 1 MHz referred to the Tx signal
amplitude at F1out
max. 6 dB
Interfaces on the SCU module 10
Application class acc. to G.957: S4.1 L4.1 L4.2
Transmitter
Maximum Tx power – 8 dBm 2 dBm 2 dBm
Range < 15 km < 40 km < 80 km
Wavelength 1300 nm 1300 nm 1550 nm
Wavelength range 1274 . . 1356 nm 1280 . . 1335 nm 1480 . . 1580 nm
Spectral width < 2,5 nm < 1 nm < 1 nm
Side mode suppression - > 30 dB > 30 dB
Dynamic extinction ratio 8,2 dB 10 dB 10 dB
Maximum Tx power in case of a fault 2 mW 2 mW 2 mW
Receiver
Maximum optical input power
(BER <10
-10
)
– 8 dBm – 8 dBm – 8 dBm
Sensitivity – 28 dBm – 28 dBm – 28 dBm