Quick Reference Guide - Internal Switches & Remote Connector

Bit 1	Bit 2	Bit 3	Bit 4	Telephone Network
OFF	OFF	OFF	OFF	USA, Canada
OFF	OFF	OFF	ON	Japan, low voltage networks
OFF	OFF	ON	OFF	FCC-compliant countries
OFF	OFF	ON	ON	CRT21, Europe (real line impedance)
OFF	ON	OFF	OFF	Custom country configuration
OFF	ON	OFF	ON	Custom country configuration
OFF	ON	ON	OFF	Custom country configuration
OFF	ON	ON	ON	Europe (complex line impedance)
ON	OFF	OFF	OFF	Custom country configuration
ON	OFF	OFF	ON	Custom country configuration
ON	OFF	ON	OFF	Custom country configuration
ON	OFF	ON	ON	Reserved for future use
ON	ON	OFF	OFF	Reserved
ON	ON	OFF	ON	Reserved
ON	ON	ON	OFF	Reserved
ON	ON	ON	ON	Reserved

Bit 5	Bit 6	Bit 7	Bit 8	CPTD Signal Characteristics
OFF	OFF	OFF	OFF	U.S. dial tone ("precise" dial tone)
OFF	OFF	OFF	ON	U.S. re-order signal ("fast busy" tone)
OFF	OFF	ON	OFF	WORLD, single frequency dial tone
OFF	OFF	ON	ON	WORLD, re-order, ON = 155 - 550, OFF = 155 - 550 ms
OFF	ON	OFF	OFF	WORLD, re-order, ON = 250 - 1200, OFF = 250 - 1200 ms
OFF	ON	OFF	ON	WORLD, multi-tone dial tone
OFF	ON	ON	OFF	WORLD, multi-tone dial tone
OFF	ON	ON	ON	WORLD, pulse dial tone, ON = 150 - 350, OFF = 450 - 1100 ms
ON	OFF	OFF	OFF	WORLD, pulse dial tone, ON = 100 - 250, OFF = 200 - 400 ms
ON	OFF	OFF	ON	Reserved for future use
ON	OFF	ON	OFF	Reserved
ON	OFF	ON	ON	Reserved
ON	ON	OFF	OFF	Reserved
ON	ON	OFF	ON	Reserved
ON	ON	ON	OFF	Reserved
ON	ON	ON	ON	Call Progress Tone Detection (CPTD) feature disabled

Pin	Direction	Unit	Function
1	GPIO Ground
2	GPI	Hybrid 1	Hybrid ON
3	GPI	Hybrid 1	Hybrid OFF
4	GPI	Hybrid 2	Hybrid ON
5	GPI	Hybrid 2	Hybrid OFF
6	GPO	Hybrid 1	Line Ringing Indicator
7	GPO	Hybrid 1	Hybrid In-use Indicator
8	GPO	Hybrid 2	Line Ringing Indicator
9	GPO	Hybrid 2	Hybrid In-use Indicator