Cisco VG30D, Руководство пользователя

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B-3
Cisco VG30D Voice Gateway User Guide
OL-19276-01
Appendix B References and Technical Specifications
Technical Specifications
Real Time Clock/NVRAM Devices
This device is powered by a Lithium battery:
Power
Primary Rate Interfaces
Clocking
Predicted Operational Life > 20 years
Predicted Storage Life 1 year at 70°C, or 4.8 years at 30°C, worst case
Clock Accuracy ± 1.6 minutes per month at 25°C
Operating Input Voltage Range 100 Vac to 230 Vac
AC Frequency 60/50 Hz through IEC connector
Power Consumption Maximum 10 Watts
Power Supply Integral Universal Input Power Supply Unit
Primary Rate Interfaces 2
Connectors RJ 45 (120 ohm) or BNC (75 ohm)
Line Interface CCITT G.703/G.704/G.732, 2.048Mbit/s,
120-ohm balanced or 75-ohm unbalanced
Line Encoding HDB3, clear channel capability
Frame Structure CCITT G.704 at 2.048Mbit/s;
CRC-4 multiframe mode
Sub-equipped channel configurations Fully configurable in DPNSS
Frame loss & alignment CCITT G.706 at 2.048Mbit/s
Signalling Channel TS 16 Common channel signalling timeslot 16
Signalling Protocols Q.931 Euro-ISDN (ETS 300 403)
QSIG: ISO, ETSI, ECMA
DPNSS: BTNR 188 issue 7
Signalling Orientation All protocols fully ET/PBX configurable
Clock Source The unit can be synchronised to either primary
port.
Internal Clock Stability E1 - 2.048Mbit/s ± 100 ppm