H-777

How to make H-777 with RT21 RT-5R compatible?

The necessary condition for Retevis H-777, RT21 and RT-5R compatible is same frequency and same CTCSS.

H-777:400-470MHz UHF analog radio

RT21:400-480MHz FRS analog walkie talkies

RT-5R:136-174/400-520MHz dual band keypad programmable hand-held transceiver

Therefore, there is a common frequency range between the three of them. By programming them, they will be changed to same frequency and CTCSS tone,and they will work together.

Frequency and sub-audio of H-777 and RT21

H-777 default frequency list

 

频率亚音频
462.1250063.3
462.22500NONE
462.32500NONE
462.42500103.5
462.52500114.8
462.62500127.3
462.72500136.5
462.82500162.2
462.92500D025N
463.02500D051N
463.12500D125N
463.22500D155I
463.52500D465I
450.22500D023N
460.32500NONE
469.95000203.5

 

RT21 default frequency list

频率

亚音频
462.5625067.0
462.58750118.8
462.61250127.3
462.63750131.8
462.66250136.5
462.62500127.3
462.72500136.5
462.68750141.3
462.71250146.2
462.55000123.0
462.57500D743I
462.60000D332I
462.65000D243I
462.67500D606N
462.70000D731I
462.72500

D462I

 

In summary, even if the different walkie-talkie in different group, they can communication with each other after programming to same frequency and CTCSS.It is convenient for your business to achieve all calls.

Similarly, interphones other than the H-777, RT21, and RT-5R can communicate with each other as long as they can set the same frequency and sub-audio.

 

 

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