- Model NO.: QCX601
- Type: Wired, Wireless
- Size: 48.4mmx19.2mm X15mm
- Tip/Ring Polarity Reversal: Available
- off-Hook Detection: Available
- Specification: Size: 48.4mmx19.2mm X15mm
- Usage: Laptop, Computer, Workstation, Server, Mobile phone, Telephone
- Support Network: Ring Slic
- Weight: 20g
- on-Hook Transmission: Available
- Trademark: Etross
- Origin: China
Single supply voltage: +3.3V to +5.0V.
Integral high efficiency DC/DC converter.
Transformerless 2-wire to 4-wire conversion
Integral ringing generator
Constant current feed
Tip/Ring Polarity reversal
Easy to use, with a minimum number of external components.
Simplified protection in "on-premise" applications.
Voice Over Internet Protocol (VoIP)
Key Telephone System
IP Gateway system
Wireless Desktop Phone
Set-top Box System
Voice Over DSL (VoDSL)
Short Loop Access Platforms
Remote Subscriber Units
Other Terminal Adapters
1. Switch Hook Detection
When the subscriber goes "off-hook" loop current will begin to flow. If this current is above the detection threshold the switch hook output, SHK, will switch to a logic (H). It is recommended that software or hardware de-bouncing of the switch hook signal is used. This is to avoid short pulses which can cause a false switch hook output, triggering the incorrect system response.
During loop disconnect dialling, SHK will pulse between logic (H) and logic (L) to indicate the digits being dialled. Again it is recommended that software de-bouncing of the pulse edges is used to avoid false detection of digits
2. Tip & Ring Polarity
The QCX601 can reverse the battery voltage polarity at Tip and Ring via the RFL pin. RC and 25Hz is at logic (L):
If RFL is held at logic (H) (Forward) the d. C. Voltage at Ring is negative with respect to Tip. If RFL is taken to logic (L) (Reverse) the voltage at Ring is positive with respect to Tip.