It still can be confusin'.H-350 The H-350 handset The part of the telephone that contains the speaker and the microphone. On a desktop phone, the part you hold in your hand is the handset. On a cellphone, the entire phone is the handset. See multihandset cordless and headset. , NSN NSN National Stock Number NSN Nokia Siemens Networks NSN National Storytelling Network NSN NATO Stock Number NSN New Substances Notification (CEPA) NSN National Student Number (NZ) NSN Never Say Never 5965-01-128-3944, was made for the Air Force. It is now the standard handset for tactical field telephone sets. It is equipped with a six-pin plug connector, either SI-329/U or AP-116. The H-350 has a wider microphone frequency response range than the H-250 handset. H-250 The H-250, NSN 5935-00-043-3463, is used on many tactical radios, including SINCGARS SINCGARS Single Channel Ground to Air Radio System (US DoD) SINCGARS Single Channel Ground and Airborne Radio System . It has a five-pin metallic connector plug, U-229A/U, NSN 5935-00-992-2035. Other plugs are obsolete. Compatibility The fly-in-the-ointment for these two handsets is compatibility. In tactical field telephones the sixth pin, pin F, is needed for full-duplex telephone operation. Therefore, the five-pin H-250 is incompatible incompatible adj. 1) inconsistent. 2) unmatching. 3) unable to live together as husband and wife due to irreconcilable differences. In no-fault divorce states, if one of the spouses desires to end the marriage, that fact proves incompatibility, and a divorce and only the H-350 can be used. Radios equipped with a five-pin audio connector can use either the H-250 or the H-350. The sixth pin on the H-350 will do nothing--no harm, no foul. SINCGARS radios are equipped with six-pin connectors. In SINCGARS, the F-pin is not used for audio. If you try to use the H-350 you will hear static and feedback whenever you try to use push-to-talk (PTT (1) (Postal, Telegraph & Telephone) The governmental agency responsible for combined postal, telegraph and telephone services in many European countries. (2) See push-to-talk. PTT - Post, Telephone and Telegraph administration ). Therefore, the H-350 cannot be used on SINCGARS. |
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