Filter
Top Products
1 • Introduction
Model 3120 RAS Getting Started Guide
14
Hardware overview
Signaling
Robbed-bit, R1, R2, Q.921/Q.931
Modems
Up to 96/120 V.92, V.90, K56Flex, V.34+, ISDN B-channel digital calls (additional ports/functionality can be
added by installing optional PMC expansion modules), or 64 kbps and 56 kbps DOVBS (
data over voice bearer
services
).
RS-232 control port
An RS-232 port provides for initial configuration of the RAS. The RS-232 port also supports:
– Asynchronous data at 19.2 kbps
– An RJ-45 connector with EIA-561 pinout
– A VT-100 console management interface
– Hardware CD and DTR signals for external modem support
Power system
– Removable internal dual-redundant, load-sharing power supplies
– AC power supply with 115/230 VAC, 50/60 Hz, 3 A
– Optional DC power supply with 36 to 72 VDC
– Power consumption: less than 35 watts.
– Time Lag Fuse in power supply has a rated current of 5.0 A, rated voltate of 250V
Central processing unit
The 3120 is powered by a RISC-based Intel model i80960VH processor operating at 100 MHz. The CPU
executes the LAN protocol, IP routing, WAN protocol, management and authentication software. It also sup-
ports:
– 4 Mbytes of FLASH memory
– 32 Mbytes of EDO DRAM
Temperature
Operating range: 32 to 104 °F (0 to +40 °C)
Altitude
Maximum operating altitude: 15,000 feet (4,752 meters)
Humidity
5 to 95% relative humidity (RH) at 122 °F (50 °C)