The QEMA plug-in card is designed for the Loop-V4200 and AM3440-D. The card provides user selectable A-law or mu-law coding.
The QEMA card requires an external cable to support 4-RJ45 ports for connecting to PBX tie lines, carrier facilities, or 4-wire modems. Each RJ45 port has 8 pins supporting the following signaling and transmission pairs: E/M, SG/SB, T/R, and T1/R1.
The card can configure different types, A/B side and 2/4 wire options by jump location. Users can utilize additional jumpers enclosed in the package for Type I, II, III, IV, V and TO (Transmit Only) signaling options. The Type TO provides dedicated 4-wire transmit and receive paths to lease-line modem equipment. There are choices of two side: Using A side mode, the card can operate as switching equipment. Using B side mode, the card can operate as channel equipment. There are 3 diagnostic functions supported: off hook test, loopback test, and LED display bit for signaling monitoring. Moreover, users could have LEDs provide channel setting and channel status indicators.
NOTE: The jumper version QEMA card has to work with AM3440 controller firmware v8.30.01 or up to support:
(a) 0.1dB step gain adjustment
(b) software configurable signaling bits
(c) trunk condition setting
(d) diagnostic functions
(e) side/wire/signaling/power display
- Five E&M signaling types are supported: Type I, Type II, Type III, Type IV, and Type V
- Jumpers selectable for Type I, II, III, IV, V or Tx only
- TO (Transmit Only) supported
- A-side and B-side supported: A-side is exchange side; B-side is carrier side
- User programmable A-law or mu-law coding
- User programmable loss adjustment
- User programmable balance 600/900 ohm impedance
- CAS signaling convention
- Jumper selectable: 2/4 WIRE, A/B SIDE
- Support diagnostic functions, including:
- off hook test
- loopback test
- LED display bit for signaling monitoring
