the xmd dsl02 is a 2-wire high speed dsl modem based on the itu-t g.991 recommendation of g.shdsl standard, capable of symmetric data (128kbps ~ 2304kbps) transmission up to 5km over 2-wire copper line. shdsl (itu g.991.2) is a new standard that fulfills the broadband requirements of business users for symmetrical, single pair, and provides the quality of service (qos) required for high bandwidth data transfer. shdsl extends transmissions farther than any other dsl technology, opening the door for service providers to deliver low cost, multiservice, broadband access to a wider subscriber base. the wide choice of dte interfaces (e1, fe1, 10/100m lan and nx64k v.35) makes dsl02 an ideal cost-effective solution for broadband access. features: l compliant with itu-t g.703, g.704, g.991.2, ieee802.3¡¢802.3u l g.shdsl (g.991.2) technology gives near fiber transmission quality from 128kbps to 2304kbps l range at 2mbps: 5km (0.5mm gauge) and 3.6km (0.4mm gauge) over 2-wire copper wire. l wide choice of dte interfaces: e1, fe1, 10/100m lan, nx64k v.35 (n¡ü32) l rate-adaptive transmission range. the lower the baud rate the longer the transmission range. l mdi/mdi-x auto negotiation for lan connection l 10/100m speed auto negotiation l half/full duplex mode auto negotiation l mac address filtration l field selectable e1/fe1 and balanced / unbalanced connection l support local analog loopback, local digital loopback and remote digital loopback tests and bert test l status leds and comprehensive diagnostic tools l 220vac or -48vdc power supply specifications g.shdsl interface standard itu-t g.991.2 line type one unconditioned, unloaded twisted pairs line code tc-16pam impedance 135¦¸ baud rate nx64k+8kbps transmit signal power +13.5 dbm ¡à0.5 dbm range(@24awg line) 2.048mbit/s 4.5km 1.920mbit/s 4.8km 1.024mbit/s 6km 128kbit/s 10km dte interfaces e1/fe1 standard itu-t g.703 g.704 line type unloaded 4-wire twisted pair 19 to 26 awg or bnc 75¦¸ coaxial cable line code hdb3 (2048 kb it/s baud rate) framing unframed/framed baud rate 2048kbps¡à50ppm transmit level according to g.703 impedance 75¦¸ unbalanced or 120¦¸ balanced field selectable receive voltage 0~-43 db transmit high voltage 2.37v ¡à10%, 75¦¸ transmit low voltage 0¡à0.1v connector rj-45: 120¦¸ balanced bnc coax: 75¦¸ unbalanced v.35 standard itu-t v.35/v.11 dce baud rate n¡á64kbps (n = 2 ~ 36) connector db-25f (db25/v.35 adapter cable required) ethernet standard ieee802.3 baud rate 10/100m auto negotiation mode half / full duplex type and connector db-25f, with db25-rj45 adapter supplied supervisory port standard v.28 rs232 baud rate 9.6kbps, async 8-bit data, 1 stop bit, no parity check, no flow control connector rj45 timing transmit & receive internal oscillator external from the dte receive clock derived from the receive signal, looped back as a transmit clock diagnostics v.54 loopbacks local analog loopback (ana, activated by the alp pushbutton) local digital loopback (dig, activated by the dlp pushbutton) remote digital loopback (rem, activated by the rlp pushbutton) physical height 58 mm / 2.3 in width 228 mm / 8.9 in depth 243 mm / 9.5 in weight 1.0kg / 2.2lb power supply ac source 165~264 vac, 50 to 60 hz, 6 va dc source -36 to -72 vdc, 5w power consumption ac: 6 va dc: 5w environment operation temperature 0 - 40¡ãc storage temperature -20 ~ 60¡ãc humidity up to 95%, non-condensing