![ZETRON 640 DAPT XTRA Скачать руководство пользователя страница 122](http://html1.mh-extra.com/html/zetron/640-dapt-xtra/640-dapt-xtra_installation-and-repair-manual_3549374122.webp)
Optional Equipment Installation
110
025-9416
q
6.
If an extender card was used, remove it and reinstall the trunk card.
If a second trunk card was removed for the adjustment procedure, reinstall it.
q
7.
Replace the top cover of the paging terminal and secure it with screws.
DUAL MULTI-FREQUENCY (MF) DECODER
The multi frequency decoder option (Part No. 702-9197) allows the terminal to accept MF digit
feed from direct inward dial (DID) trunks or E&M 2- or 4-wire trunks emulating DID.
Note:
MF is not the same as DTMF (touch-tone
) signaling. The multifrequency option will
not decode DTMF feed digits.
MF is a dual-tone signaling method similar to the common touch-tone DTMF (dual tone multi
frequency) protocol. Both formats use two combined tones. MF tones, however, are different
frequencies from DTMF tones. Also, the MF protocol involves rigid timing constraints and
framing characters, so that
a DID line with four feed digits actually sends six characters which
can NOT decode properly as DTMF
.
MF service can be indirectly tested with most RF service monitors, using their DTMF decoders
AC coupled to the telco pair. If MF feed digit service decodes properly as DTMF characters with
no framing digits, then contact the telco service provider to correct the situation. If feed digits
plus two extra characters are observed and do not properly decode as DTMF and if the tone
bursts are not clipped, the MF digits are probably acceptable. The telco technician should have
an MF decoder to verify feed digits if necessary.
The MF option board (Part No. 702-9297) installs onto the dual trunk board to decode these
tones. Essentially, it provides a specialized tone decoder chip for each half of the dual trunk.
JP1 is used only for production testing of MF tone generation. Table 13 shows tone pairs for MF
and DTMF protocols to illustrate the differences.
Table 13. MF and DTMF Tone Pair Comparison
MF Format
Tone Pair Frequencies
Coded Digit
Name
MF Format Tones
DTMF Format Tones
1
1
700, 900
697, 1209
2
2
700, 1100
697, 1336
3
3
900, 1100
697, 1477
4
4
700, 1300
770, 1209
5
5
900, 1300
770, 1336
6
6
1100, 1300
770, 1477
7
7
700, 1500
852, 1209
8
8
900, 1500
852, 1336
9
9
1100, 1500
852, 1477
Содержание 640 DAPT XTRA
Страница 2: ......
Страница 6: ...Statements vi 025 9416...
Страница 20: ...Introduction 8 025 9416...
Страница 26: ...Specifications 14 025 9416...
Страница 96: ...Installation 84 025 9416...
Страница 126: ...Optional Equipment Installation 114 025 9416...
Страница 134: ...Voice Prompts 122 025 9416...
Страница 174: ...Parts Lists and Schematics 162 025 9416 Schematic...
Страница 175: ...Parts Lists and Schematics 025 9416 163...
Страница 176: ...Parts Lists and Schematics 164 025 9416...
Страница 177: ...Parts Lists and Schematics 025 9416 165...
Страница 178: ...Parts Lists and Schematics 166 025 9416...
Страница 179: ...Parts Lists and Schematics 025 9416 167...
Страница 180: ...Parts Lists and Schematics 168 025 9416...
Страница 181: ...Parts Lists and Schematics 025 9416 169...
Страница 182: ...Parts Lists and Schematics 170 025 9416 Silkscreen...
Страница 185: ...Parts Lists and Schematics 025 9416 173 Schematic...
Страница 186: ...Parts Lists and Schematics 174 025 9416...
Страница 187: ...Parts Lists and Schematics 025 9416 175...
Страница 188: ...Parts Lists and Schematics 176 025 9416...
Страница 189: ...Parts Lists and Schematics 025 9416 177...
Страница 190: ...Parts Lists and Schematics 178 025 9416 Silkscreen...
Страница 193: ...Parts Lists and Schematics 025 9416 181 Schematic...
Страница 194: ...Parts Lists and Schematics 182 025 9416...
Страница 195: ...Parts Lists and Schematics 025 9416 183...
Страница 196: ...Parts Lists and Schematics 184 025 9416 Silkscreen...
Страница 197: ...Parts Lists and Schematics 025 9416 185 COMPONENT LOCATIONS Dual Dial Click 702 9119C Dual MF 702 9197D 1...
Страница 198: ...Parts Lists and Schematics 186 025 9416 RAM Disk 702 9386B ROM Disk 702 9389B...
Страница 199: ...Parts Lists and Schematics 025 9416 187 TNPP Interface 702 9362C 2...
Страница 200: ...Parts Lists and Schematics 188 025 9416 Terminal Block Adapter 702 9470B...
Страница 201: ...Parts Lists and Schematics 025 9416 189 CONFIGURATION DIAGRAMS Dual Trunk Telco DID 024 0076A...
Страница 202: ...Parts Lists and Schematics 190 025 9416 Dual Trunk Telco End to End 024 0077A...
Страница 203: ...Parts Lists and Schematics 025 9416 191 Dual Trunk Telco E M 024 0078A...
Страница 204: ...Parts Lists and Schematics 192 025 9416 Dual Trunk Telco Ground Start 024 0079A...
Страница 210: ...025 9416...