System information

FCD 901 48
Issue R2A, 07.2009
XMP1 Release 5.5 System Description
Port nx64
Page 9-16 Proprietary Information Aastra
V.35 interface data
Interface definition ITU-T V.35
Electrical characteristics of control and
signalling
ITU-T V.28
Plug connector 25-pin (female) trapezoidal connector (DÜE)
Voltages for clock lines and logic states of data lines
Logic "1" - 0.55 V
 20%
Logic "0" + 0.55 V ± 20%
Electrical interface V.28
Source voltage approx. 9 V, across Ri <300 Ohms
Short-circuit current typically
10 mA
Maximum line length 15 m
Voltages for control and signalling lines to ITU-T V.28
OFF
 -3 V
ON
 +3 V
Interface lines
Table 9.G: Port nx64
T4 (115)
DTE
T2 (114)
D2 (104)
M5 (109)
S2 (105)
D1 (103)
A
B
A
B
A
B
A
B