SJ 20678-1998 General Specification for Switching Network Modules SJ20678-1998 Standard download decompression password: www.bzxz.net

Military standard for the electronics industry of the People's Republic of China FL5963
SJ 206781998
General specification for switchnetwork modules
Published on March 10, 1998
Implemented on May 1, 1998
Approved by the Ministry of Electronics Industry of the People's Republic of China Scope
Referenced documents
Quality assurance regulations
Delivery preparation
Notes
Appendix A Defect classification (supplement)
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1 Scope
Military standard for the electronics industry of the People's Republic of China General specification for switchnetwork modules
General specification for switchnetwork modules
1.1 Subject content
SJ 20678-1998
This specification specifies the classification, requirements, quality assurance regulations and delivery preparation of the switching network modules of incremental modulation communication equipment.
1.2 Scope of application
This specification applies to the design, manufacture, inspection and acceptance of digital switching network modules (hereinafter referred to as modules) of trunk nodes or entry nodes in incremental modulation communication equipment. 1.3 Classification
1.3.1 Switching capacity
See Table 1 for classification by switching capacity.
Switching capacity
1.3.2Environmental level
Group bit rate
kbit/s
Number of ingress and egress group ports
According to the application of the module in an environment, the high and low temperature working temperature severity levels of the module products are divided into Level I and Level II. See Table 2.
The Ministry of Electronics Industry of the People's Republic of China Issued on March 18, 1998 and implemented on May 1, 1998
2Referenced documents
SJ20678—1998
GB1772—79Test method for failure rate of electronic components GB/T12640—90Measurement method for digital microwave relay communication equipment GB/T13427-92Technical requirements for incremental modulation terminal equipment GJB179A-96Counting sampling inspection procedures and tablesTest methods and procedures for microelectronic devices
GJB 548A-96
GJB597A-96 General Specification for Semiconductor Integrated Circuits 3 Requirements
3.1 Qualification
Products submitted in accordance with this specification should be qualified or approved. 3.2 Module composition and main indicators
Module structure
Operating temperature
0～60
The module is composed of a programmable gate array and a configuration file. Its functional block diagram is shown in Figure 1. Timing
Parallel hunting
Group input
Serial/well
3.2.2 Main indicators of the module
Switching network
(SHC)
Loop signaling filter crab
Parallel signal
Parallel/serial
Figure 1 Block diagram of switching network module
3.2.2.164-line switching network module
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Group output
P bus
SJ 20678—1998
3.2.2.1.1 Input and output characteristics (see 4.7.1.1) a. The group bit rate is 256kbit/s, with a total of 4 group ports; b. The tolerance is ±50×10-6
c. The frame structure of the group bit rate should meet the requirements of 4.2.1 of GB/T13427: d. The switching frequency is 2kHzi
e. The single-channel bit rate is 16kbit/s:
f. The signal is NRZ code:
g: The phase relationship between the signal and the clock is rising edge alignment: h The input and output impedance is CMOS level compatible with TTL level. 3.2.2.1.2 Switching capacity (see 4.7.1.2) Realize 64-line non-blocking time division switching.
3.2.2.1.3 Loop signaling (see 4.7.1.3) Can receive 64 loop signaling.
3.2.2.1.4 Conference bridge (see 4.7.1.4) The conference bridge supports broadcast conferences and can support up to 4 conferences, with no limit on the number of participants in each conference. 3.2.2.1.5 Timing and testing (see 4.7.1.5) The module should be able to perform self-tests on the timing it provides. 3. 2.2.1. 6 Interface (see 4.7.1.6) a: The module should provide a parallel data interface that allows the packet switching module to be superimposed on the circuit network. b The module should be able to interface with the microprocessor (MP): provide data bus, address bus, read and write signals, and chip select signals: MP communicates with the module in an asynchronous manner. 3.2.2.2 256-line switching network module
3.2.2.2.1 Input and output characteristics (see 4.7.1.1) a. The group bit rate is 512kbit/s, with a total of 8 group ports; b. The tolerance is ±50×10-;
c. The structure of the group bit rate should meet the requirements of 4.2.1 of GB/T13427; d. The switching frequency is 2kHz;
e. The single-channel bit rate is 16kbit/s
f. The signal is NRZ code;
g. The phase relationship between the signal and the clock is rising edge alignment: h. The input and output impedance is CMOS level compatible with TTL level. 3.2.2.2.2 Switching capacity (see 4.7.1.2) Realize 256-line non-blocking time-division switching.
3.2.2.2.3 Loop signaling (see 4.7.1.3) 256 loop signaling can be received.
3.2.2.2.4 Conference bridge (see 4.7.1.4) SJ20678-1998
The conference bridge supports broadcast conferences and can support up to 64 conferences. The number of participants in each conference is unlimited. 3. 2. 2. 2. 5 Timing and testing (see 4.7.1.5) Same as 3.2.2.1.5.
3.2.2.2.6 Interface (see 4.7.1.6)
Interface with MP and interface with packet switching module are the same as 3.2.2.1.6, 3.2.2.3512-line switching network module
3.2.2.3.1 Input and output characteristics (see 4.7.1.1) a. The group bit rate is 1024kbit/s, with a total of 8 group ports: b. The tolerance is ±50x10;
The sequential structure of the group bit rate should meet the requirements of 4.2.1 of GB/T13427: d. The switching frequency is 2kHz;
The single channel bit rate is 16 bit/s;
f. The signal is NRZ code:
The phase relationship between the signal and the clock is rising edge alignment: g
l. The input and output impedances are CMOS level compatible with TTL level. 3.2.2.3.2 Switching capacity (see 4.7.1.2) Realize 512-line non-blocking time division switching.
3.2.2.3.3 Loop signaling (see 4.7.1.3) Can receive 512 loop signaling.
3.2.2.3.4 Conference Bridge (see 4.7.1.4) The conference bridge supports broadcast conferences and can support up to 128 conferences, with an unlimited number of participants in each conference. 3.2.2.3.5 Timing and Testing (see 4.7.1.5) Same as 3.2.2.1.5.
3. 2. 2. 3. 6 Interface (see 4.7.1.6) Same as MP interface 3.2.2.1.6b.
3.2.2.4 1024-line switching network module
3.2.2.4.1 Input and output characteristics (see 4.7.1.1) The group bit rate is 1024kbit/s: a total of 16 group ports: a.
b, tolerance is ±50x10~6;
c, the frame structure of the group bit rate should comply with the requirements of 4.2.1 in GB/13427; -4
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The switching frequency is 2kHz;
The single-channel bit rate is 16kbit/s;
f, the signal is NRZ code:
SJ206781998
g The phase relationship between the signal and the clock is rising edge aligned; h. The input and output impedances are CMOS level compatible with TTL level. 3.2.2.4.2 Switching capacity (see 4.7.1.2) Achieve 1024 lines of non-blocking time-division switching.
3.2.2.4.3 Loop signaling (see 4.7.1.3) Can receive 1024 loop signaling.
3.2.2.4.4 Conference bridge (see 4.7.1.4) The conference bridge supports broadcast conferences and can support up to 256 conferences. The number of participants in each conference is unlimited. 3.2.2.4.5 Timing and testing (see 4.7.1.5) are the same as 3.2.2.1.5.
3.2.2.4.6 Interface (see 4.7.1.6)
and MP interface are the same as 3.2.2.1.6b.
3.3 Module dimensions and installation
3.3.1 Module dimensions
Module dimensions 1xbxh, mm: 28×28x6.7. 3.3.2 Installation
a. The module is installed in a ceramic pin grid array (G type) package with a pin pitch of 2.54mm, which is the standard integrated circuit pin pitch;
b. In the bottom view of the module product, the terminal identification mark is A1, and the coordinate numbers of other terminals are shown in Figure 2:
Terminal function: power supply B4 pin, ground L5 pin: other terminal functions are specified by the product specifications. Vision
11109gT'6SA2
000000000
00000000000r
000000000008
0000000
Dense view
129451891011
Figure 2 Lead arrangement
3.4 ​​Reliability
The failure rate Ap is 1.1×10-6/h.
3.5 Environmental requirements
3.5.1 Temperature cycle
SJ 20678-1998
The module should be able to withstand the temperature cycle test of test condition C in GJB548A method 1010A. 3.5.2 High temperature storage
The module should be able to withstand a high temperature of 100°C, and take a short-term high temperature storage test of 24h. 3.5.3 Mechanical shock
The module should be able to withstand the shock test in GJB548A method 2002A. Test conditions:
Shock pulse peak acceleration: 4900m/s3; a.
b. Shock pulse width: 1.0ms:
c. Number of shocks: 5 times.
3.5.4 Variable frequency vibration
The module should be able to withstand simple harmonic vibration of equal amplitude. The test parameters are shown in Table 3. 3
Frequency range
3.5.5 Constant acceleration
Acceleration
Test in each direction
Scanning time
Number of scans
Scanning cycle
The module should be able to withstand the test requirements of 60s test time and 49000m/s? of constant acceleration. 3.5.6 Moisture resistance
The module should be able to withstand the moisture resistance test requirements of GJB548A method 1004A Figure 1004A-1 conditions. 3.5.7 Thermal shock
The module should be able to withstand the thermal shock test with the following requirements a. Shock temperature: high temperature is 100℃: low temperature is 0℃: b. Dwell time: 5min
Transition time: 10$:
d. Cycle times: 15 times.
3.5.8 Salt spray
The module should be able to withstand a salt spray atmosphere of 0.5% to 3% salt solution at 35°C for 24h, 6-
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3.5.9 Sealing
sJ 20678—t998
The detailed leakage inspection and sealing requirements of the module should comply with the test condition A1 in GJB548A method 1014A, and its leakage rate (R1) should be less than 101×10-kPa.cm3/s (air) 3.6 Anti-static
The anti-static measures for the module are:bzxz.net
a. Input protection circuit is designed in the module:
b. The module and the workbench are well grounded;
c. The module should be stored in a conductive foam material or container. 3.7 Marking and code
3.7.1 Marking content
Model, grade, trademark, production date and lead-out terminal identification mark, 3.7.2 Position
Mark the module model and grade in the center of the module shell in the top view direction: the trademark and production date mark are specified by the product specification.
3.7.3 Code
The code consists of three parts, see Figure 3.
Name (original name)
Example: 64-line group, bit rate, 256kbit/s, temperature severity level I module is represented by MSN-64×256-1 Figure 3 Model code
a: Name (main name): represented by the English initials MSN (switching network module); b. Type: switching capacity × transmission bit rate, see Table 1: C. Grade: Indicated by Roman numerals I, I, see Table 2. 3.8 Appearance quality
a. Text and symbols should be clear:
b. The module and lead pins should be firm and without scratches. 3.9 Power supply and power consumption requirements
3.9.1 Power supply
Band input voltage: 5Vt0.5V.
3.9.2 Power consumption
Module power consumption is specified by the product specification.
4 Quality assurance regulations
4.1 Inspection responsibility
SJ 206781998
Unless otherwise specified in the contract or order, the contractor shall be responsible for completing all inspections specified in this specification. If necessary, the ordering party or the superior appraisal agency has the right to inspect any of the specified inspection items. 4.1.1 Qualification responsibility
All products must meet all requirements of Chapter 3 of the specification. The inspections specified in this specification shall become an integral part of the contractor's entire inspection system. If the contract includes inspection requirements not specified in this specification, the contractor shall also ensure that the products submitted for acceptance meet the contract requirements. Quality consistency sampling does not allow the submission of products that are known to be defective, nor can the ordering party be required to accept defective products. 4.2 Inspection classification
The inspections specified in this specification are divided into:
a. Identification inspection;
b. Quality consistency inspection.
4.3 Inspection conditions
4.3.1 Standard atmospheric conditions
Unless otherwise specified, various tests shall be carried out under the following standard atmospheric conditions: a. Ambient temperature: 15°C~35°C:
b. Relative humidity: 20%~80%:
C. Air pressure: air pressure of the test site.
4.3.2 Test Instruments
The performance indicators of all test equipment and instruments should be higher than the precision of the measured indicators by one-half or one-third of the order of magnitude, and within the effective period of qualified quality assurance. 4.4 Identification and Inspection
Identification and inspection are generally carried out during the design and production finalization. However, when there are major changes in the main design, process, and materials of the module that affect the important performance of the module and make the original identification results no longer valid, identification and inspection should also be carried out. 4.4.1 Number of Samples
The number of samples for identification and inspection is generally not less than 10 pieces. The number of samples for reliability test shall be in accordance with the provisions of the contract or agreed upon by the contractor and the ordering party. 4.4.2 Inspection items
Inspection items are shown in Table 4. The specific inspection sequence is specified in the product specification 18
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Inspection items
Input, erase characteristics
Switching capacity
Loop signaling
Conference bridge
Timing and test
Dimensions and installation
Reliability requirements
Temperature cycle
High storage
Machine impact
Variable frequency vibration
SJ 20678---1998
Table 4 inspection items
Consistency test
Item number
3.2.2.1.1
3.2.2.2.1
3.2.2.3.1
3.2.2 .4.1
3.2.2.1.2
3.2.2.2.2
3.2.2.3.2
3.2.2.4.2
3.2.2.1.3
3.2.2.2.3
3 .2.2.3.3
3.2.2.4.3
3.2.2.1.4
3.2.2.2.4
3.2.2.3.4
3.2.2.4.4
3.2.2.1.5||t t||3.2.2.2.5
3.2.2.3.5
3.2.2.4.5
3.2.2.1.6
3.2.2.2.6
3.2.2.3.6
3.2.2.4.6
Test method
Article number
Test items
Constant acceleration
Moisture resistance
Heat shock
Anti-static
Sign and code
Appearance quality
Power supply and
Power consumption
SJ 20678---1998
Continued Table 4
Conformity inspection
Article number
Note: ① The symbol "○" in the table indicates a required item; "△" indicates an optional item; "-" indicates an unrequired item. ② Whether the test is required can be determined by negotiation between the two parties to the contract. 4.4.3 Qualification criteria
Test method
Chapter number
When all inspection items meet the requirements of Chapter 3 and Chapter 5, it is judged to be qualified for the identification inspection. If any inspection item does not meet the specified requirements, the inspection should be stopped. The contractor should analyze the unqualified items, find out the causes of the defects, and take corrective measures, and then continue to inspect from this item or related items. If all inspection items meet the specified requirements after continued inspection, it is judged to be qualified for the identification inspection. If there is still an item that does not meet the specified requirements after continued inspection, it is judged to be unqualified for the identification inspection. 4.4.4 Maintenance of qualified identification qualification
In order to maintain the qualified identification inspection qualification, the contractor shall provide test data. Generally once a year. 4.5 Quality consistency inspection
4.5.1 Inspection grouping
The quality consistency inspection of the module is divided into groups A, C and D. 4.5.1.1 Group A inspection
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