The QFXO plug-in cards are a series of 2 different plug-in cards designed for the Loop-AM3440-B and Loop-AM3440-C. It allows voice frequency interfaces to be multiplexed as a 64 kbps DS0 signal onto a digital network. The QFXO provides four voice connections to central office or PBX and provides user selectable A-law or mu-law coding. Most popular signaling conventions are supported, including PLAR (private line automatic ring down).
- 4 central office or PBX line connections for QFXO
- Loop start or ground start (manufacturing option)
- 12 khz or 16 khz metering pulse (manufacturing option)
- ANSI, ETSI (manufacturing option)
- A, B, C, D Bit (manufacturing option)
- User programmable A-law or Mu-law coding
- User programmable loss adjustment
- User programmable balance 600/900 ohm impedance
- Most signaling conventions supported
- Battery reverse supported
