Hx1-Hx2 Manual-1.4.1 - Telos
Hx1-Hx2 Manual-1.4.1 - Telos
Hx1-Hx2 Manual-1.4.1 - Telos
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28 | section 4<br />
The internal DIP switch bank is divided up into two subsets of 4 switches each:<br />
♦ Bits #1 through 4 configure the Hx’s telephone interface circuitry to match the telephone<br />
line impedance and voltage characteristics of the country where the hybrid is used.<br />
♦ Bits #5 through 8 configure Call Progress Tone Detection to match the call progress<br />
tones used by various countries or central office switches. Call progress tones (Dial tone,<br />
busy tone, etc) can be used to make the Hx disconnect when loop current signaling is not<br />
available or is unreliable. Call Progress Tone Disconnect is active only on Auto-Answered<br />
incoming calls to prevent undesired disconnections. It may be disabled if the feature<br />
causes problems in your application. See internal DIP switch settings table below.<br />
Table 1 lists what telephone network characteristics are being selected by Bits #1 through 4.<br />
Table 2 lists the Call Progress Tone Detection characteristics being selected by Bits #5 through 8.<br />
Table 3 lists the recommended DIP switch settings for each country. Reorder tone is a “fast<br />
busy” signal often used to indicate network congestion or error conditions.<br />
Table 1 - Internal DIP Switch bank<br />
Bit 1 Bit 2 Bit 3 Bit 4 Telephone Network<br />
OFF OFF OFF OFF USA, Canada<br />
OFF OFF OFF ON Japan, low voltage networks<br />
OFF OFF ON OFF FCC compliant countries<br />
OFF OFF ON ON CRT21, Europe (real line impedance)<br />
OFF ON OFF OFF Custom country configuration<br />
OFF ON OFF ON Custom country configuration<br />
OFF ON ON OFF Custom country configuration<br />
OFF ON ON ON Europe (complex line impedance)<br />
ON OFF OFF OFF Custom country configuration