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9
3.2.4 Sub-card of E&M 4-wire audio relay interface (RC3000-SUB-DM4)
¾ AD gain: +14 db
¾ DA gain: +4 db
¾ AD frequency characteristic (300-3400Hz): 0±0.2 db
¾ DA frequency characteristic (300-3400Hz): 0±0.2 db
¾ Output loop impedance: 600Ω
¾ Input loop impedance: 600Ω
¾ Balance: 60 db
¾ Maximum voltage of common-mode: 300 V
¾ Common-Mode Rejection Ratio: >60 db
¾ Power supply Rejection Ratio: 30 db
¾ Idle channel noise: >60 db
Note: AD gain and DA gain are adjustable according to user’s requirement
3.2.5 Sub-card of V35 interface (RC3000-SUB-DV35)
¾ Physical characteristic: Comply with V.35 interface standard
¾ Interface type: HDB26 female connector
¾ Working mode: DCE
¾ Interface rate: N×64Kbps (N=1-31)
3.2.6 Sub-card of V24 interface (RC3000-SUB-DV24)
¾ Physical characteristic: Comply with V.24 interface standard
¾ Interface type: RJ45 female connector
¾ Working mode: DCE
¾ Interface rate: N×64Kbps (N=1-2)
3.2.7 Sub-card of Ethernet interface (RC3000-SUB-DETH)
¾ RJ-45 interface of UTP, the longest transmission distance of CAT-5 cable is 100m.
¾ Comply with IEEE 802.3 recommendation, 10M, full/half duplex auto-negotiation.
¾ Support IEEE 802.1d Spanning Tree relay, IEEE 802.1q VLAN packet relay
¾ Maximum Ethernet frame size is 1583 bytes
¾ Support flow control of IEEE 802.3x in full duplex
¾ Support flow control of backpressure in half duplex
¾ AUTO-MDI/MDIX
3.2.8 Sub-card of RS232 interface (RC3000-SUB-D232)
¾ Physical characteristic: comply with RS232 interface recommendation
¾ Interface type: RJ45 connector
¾ Interface rate: maximum rate 19.2KBps
3.2.9 Sub-card of RS422 interface (RC3000-SUB-D422)
¾ Physical characteristic: comply with RS422 interface recommendation
¾ Interface type: RJ45 connector
¾ Interface rate: Maximum rate 19.2KBps
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