1、f MlL-T-2LI2A 58 9999906 0355353 4 .J= -33-qo I MILITARY SPECIFICATION TELEPHONE SETS, TA-970/Uy TA-980/Uy AND TA-?9O/U MIL-T-28842A(EC) 11 May 1981 SUPER SED I NG 28 February la7P (See 6.4) MIL-T- 2P842 ( EC ) This specification is approved for use by the Naval Electronic Systems Command, Departmen
2、t of the Navy, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the performance, production, and testing requirements for Telephone Sets TA-970/UY TA-980/Uy and TA-99O/U for use with shipboard secure voice comnunicat
3、ions systems. 1.2 Classification. The telephone sets shall be of the following types, as specified (see 6.2.17: a. Type I - TA-970/U. The TA-S70/U provides telephone and control capability for b. Type II - TA-980/U. The TA-980/U provides telephone and control capability for c. Type III - TA-99O/U. T
4、he TA-99O/U provides telephone and control capability for one telephone channel only. one of twelve switch selected telephone channels. one telephone channel only. 2. APPLICABLE DOCUMENTS 2.1 Government documents. The following documents, of the issue listed in the Department of Defense Index of Spe
5、cifications and Standards (DODISS) and its supplements, form a part of this document to the extent specified herein. thereto shall be as specified in the solicitation. The date of the applicable DoDISS and supplements SPECIFICATIONS MIL I TARY MIL- S-901 MIL - E- 16400 MIL- E-17555 MI L-C- 28843 Sho
6、ck Tests, H. I. (High-Impact), Shipboard Mach i nery , Eq u i pmen t And Sys terns , Req u i remen t s For Electronic, Interior Comnunication And Navigation Equipment, Naval Ship And Shore, General Specification For E 1 ec tr on i c And El ec tr i c a 1 Equ i pmen t , Accessories, P.nd Repair Parts,
7、 Packaging And Packing Of Control, Remote Slwitching, C-l0315/U And C- 10979/U Beneficial coments (recomendat ions , additions, del et ions) and any pert i nent data which may be of use in improving this document should be addressed to: Comnander, Naval Electronic Systems Comnand (ELEX-5043), Washin
8、gton, D.C. 20360, by using the self-addressed Standardization Document Improvement Proposal (OD Form 1426) appearing at the end of this document, or by letter. - PROBLEM HARD COPY Licensed by Information Handling Services MIL-T-28842A 58 7777906 0155154 b HIL-T-28842A( EC) STANDARDS MI L I TARY MIL-
9、STD-105 MIL-STD-108 MIL- STD- 109 MIL-STD-461 MIL-STD-462 MIL- STD-47 1 MIL-STD-781 MIL-STD-810 MIL-STD-965 DRAW I NGS MIL I TARY NAVAL ELECTRONIC SYSTEMS COMMAND DL 76E2N100 DL 76E3N100 DL 78E4N100 Sampling Procedures And Tables For Inspection By Attributes Definition Of And Basic Requirement For E
10、nclosures For Electric And Electronic Equipment Quality Assurance Terms And Definitions Electromagnetic Emission And Susceptibility Requirements For The Control Of Electromagnetic Interference Electromagnetic Interference Characteristics, Measurement Of Maintainability Demonstration Reliabiiity Desi
11、gn Qualification And Production Acceptance Tests Exponential Distribution Environmental Test Methods Parts Control Program Data List, Telephone Set TA-970/U Data List, Telephone Set TA-980/U Data List, Telephone Set TA-990/U (Copies of specifications, standards, and drawings required by contractors
12、in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) 3. REQUIREMENTS 3.1 General. 3.1.1 Classification of requirements. The requirements for the Type I, Type II, and Type The Type I, Type II, and Type III telepho
13、ne sets shall be in accordance with MIL-E-16400 to the extent specified herein. III telephone sets are classified as follows: Requirement Paragraph First art ic 1 e Parts, materials, and processes Des i gn Re1 iabi 1 ity Construction Maintainabi 1 ity Performance characteristics Environmental requir
14、ements Electromagnetic interference and electromagnetic compati bi 1 i ty Physical requirements Color and finish Workmanshi p 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 P 3.2 First article. When specified (see 6.2.1), the contractor shall furnish sample unit(s) for first article inspection
15、and approval (see 4.3 and 6.3). 2 Licensed by Information Handling ServicesMIL-T-288LIZA 58 m 7777706 0355355 B W MI L-T-28842A ( EC ) 3.3 Parts, materials, and processes. 3.3.1 Parts control. The parts to be incorporated in the telephone sets shall be Parts, materials, and processes used in product
16、ion of the telephone sets shall conform to the requirements of MIL-E-16400. controlled in accordance with MIL-STD-965, Procedure I. 3.4 Desicn. The telephone set design shall conforn? to the requirements of Drawings (DWGs) 3.4.1 Telephone set composition. DL 76E2N100, DL 76E3N100, or DL 78E4N100, an
17、d MIL-E-16400 to the extent specified herein. consist of a handset and a base. Each Type I, Type II, and Type III telephone set shall 3.4.1.: Handset. The handset shall be in accordance with DWGs DL 76E2N100, OL 76E3N100, and DL 78E4Y100. 3.4.1.2 :diXJr*s .;poriFi+l ill 3.4-3.1.1 through 3.4.3.1.9 s
18、lid11 be provided on the Front panels of iyp? i, TJ;E II, arid Type III telephone sets. * 3.4.3.1.1 Speaker muted by switch-. A three position rotary switch labeled Speaker Muted By 3.4.3.1.2 Lamp dimer control. The lamp dimer control shall permit the operator to adjust 3.4.3.1.3 Channel select swit
19、ch, Type II. shall be provided For controlling the output of the auxiliary circuit (see 3.8.2.10). the intensity of the detect, disconnect, cipher, and plain lamps simultaneously. operator to choose a signal interface with any one of a possible 12 external telephone channels. The channel select swit
20、ch shall permit the 3.4.3.1.4 Ci her switch-. 3.8.2.6.1 ai16 3.* 3.4.3.1.5 Plain switch. The mode selection of the plain switch shall be as specified in 3.8.2.6.1 and 3.8.2.E.1. The mode selection af the cipher switch shall be as specified io 3.4.3.1.6 Detect lam. The detect lamp shall provide the o
21、perator a visual indication of the receive cipher condition. 3 o Licensed by Information Handling ServicesMIL-T-28842A (EC ) 3.4.3.1.7 Disconnect lam . The disconnect lamp shall provide the operator a visual indication when + the te ephone set does not have access to the exterriial circuit. 3.4.3.1.
22、8 Ci her lam . The cipher lamp shall conform to the mode indication specified ir! 3.8.2.6.2 and 3.- 3.4.3.1.9 Plain lam . 3.8-2.6.2 and 3.d The plain .lam0 shall conform to the mode indication specified it? 3.4.3.2 Panel layout. The base front panel layout $.tvill kc as scecificd ip DCIG DL 76E2N100
23、 for Type I, DWG DL 76E3N100 for T-ype II, and DA6 DL 7-ft: ad hfirt4rmi prictec circuit (PC) cards. 3.4.5 Safety. 3.5 Reliability. The telephone sets shall be ir! icccrdancc with the reauiremepts of the Safety criteria paragraph of MIL-E-16400. 3.5.1 Quantitative reliability requiremert. The specif
24、iod upper test man-time-between- failures (MTBF) (eo as defined in MIL-STD-761) shall be 10,000 hours. The lower test MTBF (01 as defined in MIL-STD-781) shall be 3333 hours. The telephone sets shall be manufactured in accordance with the drawings and subsidiary specifications listed in DWGs DL 76E2
25、NI0, DL 76E3N100, and DL 78E4N100, and related lists, except insofar as errors of orrission or comnission on the drawings may be incompatible with the requirements of this specification. 3.6 Construction. 3.6.1 m. 3.6.1.1 T e I and II. The base shall he ccnstructee of frrrous metal and shall have 8
26、hinged front pane -r- The degree of enclcsiires shell be unity t1, -2 dB at 1 kHz with strap option -20 dBm average, O dBm peak -6 dBm average, t14 dBm peak. A strap option shall be provided so 470 ohms 210 percent at 1 kHz unbalanced to ground 600 ohms 510 percent at 1 kHz balanced Flat within 1 dB
27、 peak-to-peak from 200 Hz to 4 kHz 3.8.2.5 PTT function. 3.8.2.5.1 Type I and Type III. A relay-operated pair of contacts shall be provided which places terminal 6 of TB1 at signal ground when the PTT switch on the handset is closed and the handset is connected to the base and removed from the hook.
28、 terminal 6 of TB1 shall be open. character i s t i cs : When the PTT switch is open, The relay-operated contacts shall conform to the following a. Resistance. 2 ohms maximum (contacts closed) b. 100 kohms minimum (contacts open) Voltage drop (contacts closed). One V maximum DC, at 500 mA DC 3.8.2.5
29、.2 TYPE II. A re4ay-operated pair of contacts shall be provided which places terminal 5 of TBvsignal ground when the PTT switch on the handset is closed and the handset is connected to the base and removed from the hook. TB( ) shall be open. The relay-operated contacts shall conform to the following
30、 characteristics: When the PTT switch is open, terminal 5 of a. Resistance. 2 ohms maximum (contacts closed) b. 100 kohms minimum (contacts open) Voltage drop (contacts closed). One V maximum DC, at 500 mA DC 3.8.2.6 Modes of operation, Type I and Type III. 3.8.2.6.1 Mode selection. means of normall
31、y open spring-loaded pushbutton switches. place a ground at terminal 7 of TB1. 7 of TBl. The CIPHER and PLAIN switches shall be of the illuminated type. terminal 7 of TB1 shall conform to the following characteristics: Selection of CIPHER or PLAIN mode of operation shall be made by Depressing the PL
32、AIN switch shall place +24 VDC to terminal Depressing the CIPHER switch shall The interface at a Resistance. 5 ohms maximum (CIPHER switch closed) between TB1-7 and TB2-5 5 ohms maximum (PLAIN switch closed) between TB1-7 and 1A2 pin G 100 kohms minimum (CIPHER and PLAIN switches open) between TB1-7
33、 and TB2-5, and TB1-7 and TB2-3 One V maximum DC (CIPHER switch closed) between TB1-7 and TB2-5 at 200 mA DC One V maximum DC (PLAIN switch closed) .measured between TB1-7 and 1A2 pin G at a test current of 200 mA DC (test voltage applied between TB1-7 and TB2-3) b. Voltage drop. 6 Licensed by Infor
34、mation Handling Services - MIL-T-288Lt2A 58 7777706 0355357 5 W MIL-T-28842A( EC) 3.8.2.6.2 Mode indication. Indication of the mode of operation shall be as follows: a. CIPHER MODE. When terminal 6 of TB2 is placed at signal ground external to the base, the CIPHER pushbutton switch shall illuminate.
35、 Color shall be green. Resistance of the external circuit is 200 ohms maximum. b. PLAIN MODE. When 24 VDC from an external circuit is applied to terminal 6 of TB2, the PLAIN pushbutton switch shall illuminate. Color shall be red. Resistance of the external circuit is 200 ohms maximum. 3.8.2.7 Hooksw
36、itch, Type I and Type III. The hookswitch shall be a double-pole, single- throw (DPST) type and shall function as follows: a. Provide a switch closure to signal ground at terminal 4 of TB2 when handset is taken off hook, and it shall conform to the following characteristics: 1. 2. Closed circuit (ha
37、ndset OFF hook). Resistance at terminal 4, 100 ohms Provide a switch closure which connects +24 VDC to pin E of the base connector when the handset is taken off hook. Open circuit (handset ON hook). maximum Resistance at terminal 4, 100 kohms minimum b. 3.8.2.8 Modes of operation, Type II. 3.8.2.8.1
38、 Mode selection. Selection of CIPHER or PLAIN mode of operation shall be made by means of normally open spring-loaded pushbutton switches. place a ground at terminal 6 of TB( ). terminal 6 of TB( ). The CIPHER and PLAIN switches shall be of the illuminated type. interface at terminal 6 of TB( ) shal
39、l conform to the following characteristics: Depressing the CIPHER switch shall Depressing the PLAIN switch shall place +24 VDC to The a. Resistance. 5 ohms maximum (CIPHER switch closed) between TB( )-6 and TB13-4 5 ohms maximum (PLAIN switch closed) between TB( )-6 and 1A2 pin G 100 kohms minimum (
40、CIPHER and PLAIN switches open) between TB( )-6 and TB13-3, and TB( )-6 and TB13-4 b. Voltage drop. One V maximum DC (CIPHER switch closed) between TB( )-6 and TB13-3 at 200 mA DC mA DC One V maximum DC (PLAIN switch closed) measured between TB( )-6 and 1A2 pin G at a test current of 200 mA DC (test
41、 voltage applied TB( )-6 and TB13-4) 3.8.2.8.2 Mode indication. Indication of the mode of operation shall be as follows: a. CIPHER MODE. When terminal 8 of the TB( ) is placed at signal ground external to b. the base, the CIPHER pushbutton switch lamp shall illuminate. Color shall be green. Resistan
42、ce of the external circuit is 200 ohms maximum. PLAIN MODE. When 24 VDC from an external circuit is applied to terminal 8 of TB( ) the PLAIN pushbutton switch lamp shall illuminate. Color shall be red. Resistance of the external circuit is 200 ohms maximum. 3.8.2.9 Hookswitch, Type II. The hookswitc
43、h shall be a DPST type and shall function as fol lows: a. Provide a switch closure to signal ground at terminal 7 of TB( ) when handset is taken off hook, and it shall conform to the following characteristics: 1. 2. Closed circuit (handset OFF hook). Resistance at terminal 7, 100 ohms Provide a swit
44、ch closure which connects +24 VDC to pin E of the base connector when the handset is taken off hook. Open circuit (handset ON hook). maximum Resistance at terminal 7, 100 kohms minimum b. 3.8.2.10 Auxiliary audio output. The auxiliary audio output circuit of the telephone sets shall provide a bridgi
45、ng output. A three-position rotary switch labeled Speaker Muted By shall be provided for controlling the output of the auxiliary circuit. 7 Licensed by Information Handling ServicesMIL-T-28842A( EC) 3.8.2.11 Grounds. 3.8.2.11.1 Signal ground. Signal ground shall interface to TB2 terminal 5 on a Type
46、 I and 3.8.11.2 Chassis ground. Chassis ground shall not be connected to signal ground, however, When Type III telephone set and to TB 13 terminal 3 on a TYPE II telephone set. provision shall be made to internally strap signal ground to chassis ground when desired. unstrapped, the resistance from s
47、ignal ground to chassis ground shall be one megohm minimum, 2000 picofarads (pF) maximum, at standard room ambient conditions and 500 kohms minimum during environmental exposure. under standard room ambient conditions. 3.8.2.11.3 Isolated ground. telephone sets. 3.8.2.12 Phantom circuits. shall be s
48、upplied. 3.8.2.12.1 Detect. A phantom circuit with respect to signal ground shall be provided to indicate the receive cipher condition. In the application of 6 VDC 520 percent through 6.8 kohms - t20 percent to the phantom (terminals 2 and 3 of TB1 for Type I and Type II telephone sets and terminals
49、 1 and 2 of TB( ) for Type II telephone set) the DETECT lamp on the front panel shall be illuminated. On application of O VDC 20.5 V the DETECT lamp shall not be i 1 1 umi nated. to indicate connect-disconnect. On the application of a ground of 100 ohms or less to the phantom (terminals 4 and 5 of TB1 for Type I and Type III telephone sets and terminals 3 and 4 of TB( ) for Type II telephone set) the DISCONNECT LAMP shall not illuminate. lamp shall illuminate with greater than 100 kohms between (TB( )-3 and TB( )-4. - t10 percent shall be supplied through a series resistance of
