System information

FCD 901 48
Issue R2A, 07.2009
XMP1 Release 5.5 System Description
E1 interfaces
Page 9-8 Proprietary Information Aastra
Spectral width FWHM
Receiver
Maximum optical input power (BER <10
-10
) – 14 dBm
9.6.3 E1 interfaces
Interface features acc. to ITU-T G.703
Impedance, switchable
120 Ohms real (bal.), 75 Ohms coaxial (unbal.)
and highly resistive
Bit rate (2048
5 x 10
-5
) kbit/s
Period duration T
0
488 ns
Signal code HDB3
Shape of Tx signal at F1out approximate rectangle
Tx signal amplitude at F1out US
0
3 V 10% across 120 Ohms or
2.37 V
10% across 75 Ohms
Permissible attenuation of the receive signal at
F1in with a center frequency of 1 MHz ref. to the
Tx signal amplitude at F1out
max. 6 dB
Total number of EoSCU module interfaces
6 external 2 Mbit/s equipment interfaces
Connector X21: 6 interfaces
9.6.4 Clock interfaces (external clock)
Clock interface on connector X22
9.6.4.1 2048 kHz, T3
Frequency 2048 kHz
Signal shape acc. to ITU-T G.703
Impedance adjustable highly resistive, 75 Ohms or 120 Ohms
9.6.4.2 2048 kHz, T4
Frequency 2048 kHz
Signal shape acc. to ITU-T G.703