| No. | Item | Definition |
|---|---|---|
| 1. | alarm | automatic warning of a problem |
| 2. | alignment | precise positioning for best performance |
| 3. | amplifier | device increasing signal strength |
| 4. | antenna | device that radiates radio waves |
| 5. | attenuation | signal strength loss over distance |
| 6. | authentication | verifying identity or access |
| 7. | availability | time service remains operational |
| 8. | backhaul | network link to core systems |
| 9. | bandwidth | data-carrying capacity of a channel |
| 10. | base station | radio equipment serving a cell |
| 11. | battery | backup source of electrical power |
| 12. | breaker | resettable overcurrent protection device |
| 13. | BTS | base transceiver station |
| 14. | cabinet | outdoor enclosure for equipment |
| 15. | carrier | wave used to convey information |
| 16. | cell | radio coverage area |
| 17. | channel | path for signal transmission |
| 18. | checksum | error-detection calculated value |
| 19. | commissioning | placing equipment into service |
| 20. | connector | fitting joining cables or devices |
| 21. | crosstalk | signal leakage between channels |
| 22. | dBm | power level measured in decibels |
| 23. | demodulation | process of extracting information |
| 24. | dispatch | sending staff to a site |
| 25. | distortion | alteration of signal shape |
| 26. | downlink | connection from the network |
| 27. | duplex | two-way communication capability |
| 28. | echo | reflected signal heard again |
| 29. | elevation | vertical pointing angle |
| 30. | encryption | scrambling data for security |
| 31. | failover | automatic switch to backup |
| 32. | fault | problem causing improper operation |
| 33. | firewall | system filtering network traffic |
| 34. | firmware | embedded software in hardware |
| 35. | frame | structured block of transmitted data |
| 36. | frequency | number of cycles per second |
| 37. | full-duplex | simultaneous two-way communication |
| 38. | fuse | protective device against overcurrent |
| 39. | gain | increase in signal power |
| 40. | gateway | device linking different networks |
| 41. | generator | machine producing electrical power |
| 42. | grounding | electrical safety connection to earth |
| 43. | half-duplex | two-way, one direction at once |
| 44. | handover | transfer between cells or channels |
| 45. | header | control information at the start |
| 46. | IMEI | unique identifier for a handset |
| 47. | impedance | opposition to alternating current |
| 48. | interface | point where systems connect |
| 49. | interference | unwanted disturbance affecting signals |
| 50. | inverter | device converting DC to AC |
| 51. | jack | socket for cable connection |
| 52. | jitter | variation in signal timing |
| 53. | latency | delay in data transmission |
| 54. | LOS | clear line between endpoints |
| 55. | maintenance | routine upkeep of equipment |
| 56. | mast | pole supporting antennas |
| 57. | microwave | high-frequency radio transmission |
| 58. | modem | device that modulates signals |
| 59. | modulation | process of varying a carrier |
| 60. | multimeter | tool measuring electrical values |
| 61. | multiplexing | combining signals on one medium |
| 62. | node | connection point in a network |
| 63. | noise | random unwanted signal energy |
| 64. | OTDR | fiber testing reflectometer |
| 65. | outage | period when service is unavailable |
| 66. | packet | small unit of transmitted data |
| 67. | patch panel | panel for cable terminations |
| 68. | payload | useful data within transmission |
| 69. | port | physical or logical connection point |
| 70. | power supply | device providing electrical power |
| 71. | protocol | rules for data exchange |
| 72. | provisioning | setting up service or equipment |
| 73. | rack | frame holding telecom hardware |
| 74. | rectifier | device converting AC to DC |
| 75. | redundancy | backup components for reliability |
| 76. | reliability | consistency of correct operation |
| 77. | repair | restoring equipment to working order |
| 78. | repeater | device regenerating weak signals |
| 79. | roaming | using service outside home network |
| 80. | router | device that forwards packets |
| 81. | sector | subdivision of a cell site |
| 82. | signal | electrical or optical transmission |
| 83. | SIM | subscriber identity module card |
| 84. | site | physical telecom equipment location |
| 85. | spectrum | range of radio frequencies |
| 86. | splice | joined cable or fiber section |
| 87. | switch | device that connects network segments |
| 88. | termination | end connection of a cable |
| 89. | testing | checking operation and performance |
| 90. | throughput | actual data transfer rate |
| 91. | tower | structure supporting telecom equipment |
| 92. | transceiver | device that sends and receives |
| 93. | troubleshooting | finding and fixing faults |
| 94. | trunk | main communication line or channel |
| 95. | twisted pair | paired copper communication wires |
| 96. | uplink | connection toward the network |
| 97. | UPS | uninterruptible backup power system |
| 98. | VoIP | voice calls over internet |
| 99. | VSWR | measure of antenna mismatch |
| 100. | wavelength | distance between wave peaks |