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VX-2039 - Dual ISDN 4-Wire Audio Adaper The VX-2039 4-Wire Adapter for ISDN provides two independent true 4-wire circuits on a single ISDN-2 service similar to a dual-channel hybrid and accepts PSTN calls delivered over ISDN |
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VX-2039 - Dual ISDN 4-Wire Audio Adaper The VX-2039 4-Wire Adapter for ISDN provides two independent true 4-wire circuits on a single ISDN-2 service similar to a dual-channel hybrid and accepts PSTN calls delivered over ISDN |
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