System information

FCD 901 48
Issue R2A, 07.2009
XMP1 Release 5.5 System Description
Port Interfaces
Aastra Proprietary Information Page 9-9
Table 9.E: Port interfaces
9.7 Port Interfaces
9.7.1 2 Mbit/s interfaces (ports)
9.7.1.1 2 Mbit/s equipment interface (HDB3 port)
Interface characteristics to ITU-T G.703
Impedance
120 Ohms resistive (bal.) or
75 Ohms coaxial (unbal.)
Bit rate 2,048
 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
Number of interfaces on the module 2 or 4
9.7.1.2 Port LE2 OPT U
Electrical 2 Mbit/s equipment interface
Interface characteristics in compliance with ITU-T G.703
Impedance, switchable
120 Ohms resistive (bal.) or
75 Ohms coaxial (unbal.)
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
3 V
10 % across 120 Ohms or
2.37 V
10 % across 75 Ohms
Permissible Rx signal attenuation at F1in referred
to the amplitude of the Tx signal at F1out at a
center frequency of 1 MHz
max. 6 dB
Intrinsic jitter of the Tx signal at F1out Ajpp/T0
0.05 (= 24 ns)