Range: up to 60 km (37.5 miles) over unconditioned lines
Trellis-coded modulation
Adaptive equalizer
V.54 diagnostics and built-in BER tester
The MTM-15 is a medium range, 4-wire voice band modem operating at data rates up to 19.2 kbps. It is optimized for metropolitan applications where the distance is too long for short range modems, but insufficient to justify the expense of long range modems. The MTM-15 operates full duplex over 4-wire twisted pair, conditioned or unconditioned leased lines. It uses an adaptive equalizer and 16-state, 8-dimensional Trellis-coded modulation to achieve error-free communication. In synchronous transmission, the transmit timing can be selected for internal, external or loopback clock. Different async formats are switchselectable. The transmit level is selectable in 3 dB increments between 0 and -12 dBm. Diagnostic capabilities comply with the V.54 standard to perform local and remote digital loopback. A built-in BER tester, activated and monitored from the front panel, enables complete testing of both modems and the line. The MTM-15 is available as a standalone unit or as a card for the 19" ASM-MN-214 rack that holds up to 14 cards.
