VoIP over Nstreme PTMP not working good

Try this

/system script
add name="ChangeBand" \
    source=":local delais 5s\r\n:local liste 2.4ghz-b/g,2ghz-5mhz,2ghz-10mhz;\r\n \
    \r\n:foreach band in=\$liste \
    do={\r\n:if (![/interface wireless get wlan1 running]) do={\r\n/interface \
    wireless set wlan1 band=\$band\r\n:delay \$delais\r\n}\r\n}\r\n\r\n:if \
    (![/interface wireless get wlan1 running]) \\\r\ndo={\r\n    :if \
    [/interface wireless nstreme get wlan1 enable-nstreme] \\\r\n    do={\r\n  \
          /interface wireless nstreme set wlan1 enable-nstreme=no\r\n    } \
    else={\r\n        /interface wireless nstreme set wlan1 \
    enable-nstreme=yes\r\n    }\r\n}"
/system scheduler
add comment="" disabled=no interval=20s name="schedcheckWifi" \
    on-event=ChangeBand start-time=startup

Not my work, someone else on the forum made this. Changes from 5MHz/10MHz/20MHz with Nstreme on or off until it gets a lock. Works like a charm. I can change anything on my system aside from turbo and never have to touch the CPE.