7XV5662-0AD00
English
C53000-B1174-C205-1
49
Jumper E1, T1: Selection of transmission standards
The CC–2M has been designed for symmetrical transmission. If an unsymmetrical line with
an impedance of 75
Ω
is to be connected, external adaptation (BALUN) is required.
Jumper ESF, D4: Selection of framings
This selection is only relevant if the T1 standard has been set.
Jumper setting ESF:
Extended–Superframe–Format
Jumper setting D4:
Superframe–Format
The following figure shows the jumper LINE CODE.
This selection is only relevant if the T1 standard has been set.
The jumper presetting is “B8ZS”.
Figure 25 Jumper LINE CODE
This jumper can be used to select the line coding in the T1 mode. If the E1 interface has been
selected, the line code HDB3 has been preset and this jumper will not be relevant.
E1
T1
Transmission speed
2.048 MBit/s
1.544 MBit/s
Standard
ITU–T G.703 (E12)
ITU–T G.703 (E11)
Accuracy
±
50
ppm
±
32 ppm
Coding
HDB3
B8ZS/AMI
Impedance
120
Ω
100
Ω
Table 8
Jumper settings
AMI
B8ZS
LINE CODE
Содержание 7XV5662-0AD00
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