PACTOR Series: PACTOR I - PACTOR II - PACTOR III - PACTOR IV
PACTOR II is an advancement of PACTOR I. It is up to 8 times faster than PACTOR I.
PACTOR is used by many groups, including Sailmail for mariners to send and receive emails. It is also used by Ham Radio operators, Governmental and Diplomatic agencies, and even NGO's.
PACTOR II has a 450Hz bandwidth. This is a proprietary standard developed by SCS GmbH & Co. KG, Hanau, Germany.
Uses 2 DPSKDifferential Phase-Shift Keying tones. PACTOR I SELCALL is used when establishing an initial connection between two operators.
|PACTOR II ARQAutomatic Repeat reQuestAutomatic Repeat Query||PACTOR II FECForward Error Correction|
- Hobby Level Software
- Professional Equipment/Software
Since PACTOR hardware modems are relatively expensive, the WINMOR and ARDOP software modes were developed after PACTOR to give amateur radio operators a means to send email over radio for free. VARA, which is a shareware mode, may have been developed as a lower-cost competitor to PACTOR III with similar transmission speeds, though PACTOR's reliability is said to be better than VARA.
Winlink (formerly RMS Express) is an amateur radio global radio messaging service which can relay messages sent by radio to conventional e-mail servers. Winlink's radio messaging software client is called Winlink Express. Winlink Express is compatible with several PACTOR hardware modems, as well as WINMOR, ARDOP, and VARA. Winlink Express is available for Windows users only (or other x86 operating systems if run with Wine). Linux, Mac, and Raspberry Pi users may use Pat, which is compatible with PACTOR, WINMOR, and ARDOP.