Patton electronic 3120 ユーザーズマニュアル

 

Hardware overview

 

Model 3120 RAS Getting Started Guide 

 

The Model 3120 RAS is a fully integrated remote access server for central site concentration of analog and dig-
ital modem calls. The RAS (see figure 2) comprises a 1U-high 17-inch wide chassis that contains a mother-
board and two removable dual-redundant power supplies. A full set of LEDs are present on the chassis front 
panel, while connections for WAN, LAN, and control ports are present on the rear of the chassis. Two IEC-
320 receptacles provide for AC power input. Optional DC power supplies with 32 to 72 VDC are available.

 

Figure 2. Model 3120 RAS features (

 

Cool White

 

 version shown)

 

The RAS includes four WAN ports, each of which is software-selectable for T1, E1 or PRI operation. These 
WAN ports are provided via balanced RJ-48C interfaces. They also include:

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Built-in T1/E1 CSU/DSU

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T1 1.544 Mbps with: D4 or ESF framing, AMI or B8ZS, FCC part 68 compliant

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E1 2.048 Mbps with: Double frame or CRC4 framing, AMI/HDB3, CTR-4, and CTR-12 compliant

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Surge resistant time-lag fuse has a rated current of 500 mA and a rated voltage of 250 VDC

 

The dual 10/100-Mbps Ethernet LAN ports are presented on an RJ-45 connector with an auto-sensing/full-
duplex 10Base-T or 100Base-T interface. It also includes:

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100Base-TX half-/full-duplex operation (100 + 100)

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10Base-T half-/full-duplex operation (10 + 10)

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Auto detection and fallback

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10/100 Mbps link and status indicators