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E1CAS2BitITUTR2Standards and interfaces Telesis systems support signaling for two-bit R2 line / MFCR2 interregister according to ITU-T recommendations. Telesis systems support signaling for MFCR2 interregister on analog Type-V E&M interfaces. Telesis systems have R2 signaling E1 and E&M interfaces to connect to PSTN and private network Options The physical interface for single-bit and two-bit signaling is an E1 (ITU-T G.703). 120 ohm balanced terminations are supported on any E1. The line code is HDB3 or AMI programmable. CRC4 may be enabled or disabled. Each E1 channel can be programmed as incoming, outgoing, bothway trunk, or unavailable. Each analog E&M trunk board has four line circuits that satisfy the conditions for Type-V connections. Each port may individually be set to either a two- or four-wire interface with appropriate configuration of the on-the-board jumpers. An additional detector on the M-wire checks the DC feed on the line to detect faulty conditions in far-end equipment. The analog E&M trunk card is available for 600 ohm resistive reference impedance. Each E&M port can be programmed as incoming, outgoing, bothway trunk, or unavailable. The following options and parameters are available on R2 signaling interfaces of Telesis systems:
Route and Routeset Configuration In a Telesis system, each E&M interface and E1 channel may have its own route number. It is possible to define numerous distinct routes. A given route to a particular destination and its accompanying routes are grouped in a routeset. Each route in a routeset has a priority order. Routing to the next priority alternate route is possible in the event that a route becomes unavailable. Routing A Telesis system may realize routing according to:
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