cpu redundancy (1+1)? e1 redundancy (2+2)? power redundancy (1+1) [ac+ac, dc+dc, ac+dc]? dce plug-in card types* 6-channel magneto card* 6-channel 2w/4w e&m card* 6-channel fxs card* 6-channel fxo card* 6-channel rs-232 card (low speed)* 5-channel x.50 card* 4-channel g.703/64k-co card* 4-channel v.35 card (n*64k)? drop & insert function? nmp, snmp and web based management? ems system supported? compliance with itu-g.703, g.704, g.706, g.732, and g.823.specificationsg.703 e1 i/o specificationsframing:unframed / framed; ccs(pcm31) / cas(pcm30); crc4 on/offbit rate2.048mbps±50 ppmline codeami / hdb3line impedance75 ohm, unbalanced (bnc)120 ohm, balanced (rj-45)relative receive level 0 / -43dbtransmit levelpulse amplitudenominal 2.37v ±10% for 75ohmnominal 3.00v ±10% for 120ohmzero amplitude: ±0.1vtransmit frequency trackinginternal timing±30 ppmloopback timing±50 ppmexternal timing±100 ppmjitter performanceaccording to itu-t g.823complies withitu-t g.703, g.704, g.706 and g.732.interface connectorsbnc for unbalanced; rj-45 connector for balancedethernet i/o specifications? bridge module - 2 channels? 10base-t/100base-tx, full duplex or half duplex? 10base-t/100base-tx, full duplex or half duplex? ieee 802.3x flow control? real-time filtering with 256 address tables? automatic address learning, aging and deletion after 5 minutes? up to 340 packet-buffering capacity? forwarding and filtering rate at wire speed with through put latency of 1 frame.? auto padding of undersized packets to meet the minimum ethernet packet size requirement? buffering modes can be selected according to the setting of wan and lan line speeds? ethernet interface has automatic twisted pair polarity correctionlanstandardfully compliant with ieee 802.3/802.3uconnectorshielded rj-45speeds10base-t/100base-tx, full or half duplexframessupports 64 to 1522 byte packet lengths, standard and extended length frames for vlan tagging, etc.sub-e1 i/o specifications? each card provides two e1 loops, each loop provides e1a/e1b channelindependently? hot-swappable? each first e1 loop may provide external clock to be used as system clock sourceframingframed ccs(pcm31) / cas(pcm30)crc checkcrc4 on/offbit rate2.048mbps ±50 ppmline codeami / hdb3line impedance75 ohm, unbalanced / 120 ohm, balancedrelative receive level0 / -43dbtransmit level pulse amplitudenominal 2.37v ±10% for 75ohmnominal 3.00v ±10% for 120ohmzero amplitude ±0.1vjitter performanceaccording to itu-t g.823complies withitu-t g.703, g.704, g.706 and g.732interface connectorsbnc for unbalancedrj-45 connector for balancedloopback typeremote digital loopbackother datacom i/o specificationsn x 64 module, 4 channels, high speed data interfaces)interfaces typesrs-530, x.21, v.35, rs-449 and rs-232interface connectorhd68 female with appropriate cable adapter.line codenrzdata raten x 64kbps, where n equal 1 to 31 in ccs and n equal 1 to 30 in casasync module, 6 channels, <= 38.4kbps async or 6 channels, 64/128kbps sync 导购推荐 加工定制 否 品牌 ctc 型号 erm-mux/plus