Harris Constellation, Руководство по эксплуатации системы

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Constellation® January 2006
5-4 System Interconnect and Configuration
Four-Wire VF Orderwire Interface
Connector: RJ45
One VF orderwire channel provides two 4-wire VF ports.
Table 5-2: Four-wire VF Orderwire input specifications
VF Port Input Levels
a
a. Selectable through the Keypad.
Output Levels
a
VF1 0 dBm (default)
-16 dBm 0 dBm (default)
+7 dBm
VF2 0 dBm (default)
+7 dBm 0 dBm (default)
-16 dBm
Table 5-3: Four-wire VF ports performance specifications
a
a. Specifications are for one drop/insert.
Frequency response 300-3400 Hz,
±
1.5 dB
Idle noise C-message ≤ 30 dBrnc0
Quantizing noise ≤ 56 dBrnc0 at 1004 Hz
Return loss ≥ 40 dB (telephone set on-hook)
≥ 15 dB (telephone set off-hook when only one
telephone is connected to 2-wire port)
Impedance 600 ohms, balanced
Output level accuracy
±
1.0 dB
Table 5-4: Ringing generator specifications
Load 2 REN
Voltage (rated load) 60 Vrms
Ringing cadence ON 2.3 sec
Ringing cadence OFF 4.7 sec