Chapter 2 Technical Indexes
Confidential and Proprietary Information of ZTE CORPORATION 35
Interface
Test Bandwidth
–3 dB frequencies (Hz)
Peak-to-peak amplitude
(UIpp) (Note 3)
2,048 kbit/s 20 to 100 k 1.5
18 k to 100 k (Note 2) 0.2
8,448 kbit/s 20 to 400 k 1.5
3 k to 400 k (Note 2) 0.2
34 368 kbit/s 100 to 800 k 1.5
10 k to 800 k 0.15
139 264 kbit/s 200 to 3.5 M 1.5
10 k to 3.5 M 0.075
Note 1: Only used for codirectional interfaces.
Note 2: For the 2,048 kbit/s and 8, 448 kbit/s interfaces, the Qualcomm
shutdown frequency is 700 Hz (replace 18 kHz) and 80 kHz (replace 3 kHz)
respectively. The values in the table can be used for interconnection of different
networks. Alternatively, the two parties can follow other conventions.
Note 3: 64 kbit/s 1 UI = 15.6 µs
2048 kbit/s 1 UI = 488 ns
8448 kbit/s 1 UI = 118 ns
34 368 kbit/s 1 UI = 29.1 ns
139 264 kbit/s 1 UI = 7.18 ns
Physical Characteristics of STM-N
Optical Interface
Comply with ITU-T G.957 recommendations.
Interface of SDH NE Clock (SEC)
The allowed maximum output jitter index at the synchronization
interface is 0.05 UI.
Error Bit Rate of SDH Link
This equipment simulates the 280 km HRDS. The test data
should be consistent with the index in
Table 12.
TABLE 12 − 280 KM NUMBER SECTION ERROR BIT INDEX
Rate
(kbit/s)
2048 34368
139264/155
520
622080 2488320
ESR
< 6.16 × < 1.155 × < 2.464 × 10-
* *
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