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