- Two different E&M voice cards for cost-effective deployment.
- Supports Type I, II, IV & V or transmission only (TO) operation.
- Robust diagnostic evaluation and fault isolation through extensive loopbacks and test tone selection.
- Encodes analog signals into 64 Kbps PCM format for connection to digital networks.
- Ability to specify, on a port-by-port basis, North American ANSI standard AB signaling or ITU
(CCITT) ABCD signaling.
- Compatible with all IMACS voice compression server cards.
- Extended range options for long line connectivity.
IMACS EM Cards
E&M cards can be installed in any of the user slots of the IMACS chassis. E&M cards encode the incoming analog voice signals into 64 Kbps PCM format before transmission onto the network. E&M cards can use the voice-compression features of the ADPCM card. Each E&M card provides a single 50-pin female Amphenol connector (RJ21 craft cable). Both cards support E&M signaling types I, II, IV, and V. Most port parameters are software selectable on a port by port basis including the mode of each port (“e&m”, “e&mR2” or “to”), the PCM coding to be used (“u-law”, “a-law” or “a-inv” for inverted a-law), the trunk conditioning (“busy” or “idle”) to be applied towards the attached equipment should the WAN facility that the port is connected to fail.
The user may also specify, on a port-by-port basis, whether to use North American ANSI standard AB signaling (which is the default) or ITU (CCITT) ABCD signaling by turning the signaling conversion setting “on” or “off”. Software-initiated testing and diagnostics supported on E&M cards include the setting of both analog (“anlg”) and digital (“dgtl”) loopbacks towards the network and the generation of a digital mw signal on a port-by-port basis. A robust set of test functions allows the user to monitor and set the state of the analog E and M leads of any port and to set and monitor the state of the ABCD signaling bits of the digitized voice signal. In cross-connect systems, the test functionality also includes the ability to generate test tones (“300Hz”, “1 kHz”, “3 kHz” and “quiet”) and transmit those toward either the user side or the network side of the system.Download or print data sheet