The IRLP uses Voice-Over-IP (VoIP) custom software and hardware.
IRLP使用定制的的软硬件，加上强大的互联网。
With many IRLP users not being on HF they may have never considered having QSL CARDS printed.
然而很多IRLP用户没有在HF上操作过，从来没想到过要印一样QSL卡。
With many IRLP users not being on HF they may have never considered having QSL CARDS printed.
然而很多IRLP用户没有在HF上操作过，从来没想到过要印一样QSL卡。
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