Table of Contents

Base Unit Components

Base Unit Components

Base Unit

This chapter describes the FastPAD base unit. It includes a description of base unit models, front panel components, and the interior of the FastPAD.

Front Panel

The front panels for the FastPAD and FastPAD Micro are shown in Figure 2-1 and Figure 2-2. Either unit may be used on a desktop or mounted in a rack.

Figure 2-1: FastPAD Front Panel

Figure 2-2: FastPAD Micro Front Panel

Front Panel LEDs

The base unit front panel for both models includes the following:

• A 4-line by 20-character LCD display.
  
  
• Four directional push buttons.
  
  
• Two control buttons (ENTER and ESC).
  
  
• Seven Light Emitting Diodes (LEDs).
  
  

The LCD display shows the system's status, configuration, events, and test menus. The directional push buttons are used to select the information that is presented in the LCD display. The two control buttons are used to move forward (ENTER) and backward (ESC) through the sequence of menus. The LEDs indicate critical system status information as follows:

The following paragraphs further describe the indications of the seven base unit front panel LEDs:

Rear Panel

There are five RS-232 data ports, one high speed data port, one composite port, and one RS-232 asynchronous Network Management System (NMS) port on the back of the FastPAD. An IEC receptacle provides the connection to the AC power source via an AC power cord, as shown in Figure 2-3 and Figure 2-4

Figure 2-3: FastPAD Rear Panel

Figure 2-4: FastPAD Micro Rear Panel

AC Power Connector

AC power modules have a fuse below the power connector. When replacing the fuse, make sure to use the exact type and rating marked next to the fuse holder. Fan vents located above the on/off power switch are for cooling and must not be blocked. The slotted panels that are visible from the back allow access to the individual PTT/telco connectors of each plug-in card installed in the internal expansion slots.

Figure 2-5: AC Power Connector

DC Power Connector

If the -48V DC power supply is installed, the back panel will include a DC input terminal with a fuse located directly above it as shown in Figure 2-6.

Figure 2-6: -48V DC power Terminal and Fuse

There are two screws in the center of the DC input terminal (under the safety cover) that can be used to attach DC power to the unit. Facing the back of the unit, the left screw is the positive (+) terminal and the right screw is the negative (-) terminal. This information is silk-screened on the back of the unit.

When attaching a DC power source, observe polarity: attach the positive lead from the power source to the positive terminal (+) on the back of the FastPAD, attach the negative lead from the power source to the negative terminal (-) on the back of the FastPAD. The fuse assembly is located immediately above the DC input terminal. To remove the fuse, use a flat-blade screw driver and gently press in on the fuse holder and rotate counter-clockwise. When replacing the fuse, make sure to use the exact type and rating marked next to the fuse holder (i.e. Time Delay 6.3 Amp 250V Fuse).

FastPAD Interior

Unless otherwise specified, the option cards are installed in the FastPAD and tested as a complete system. If you need to install additional cards or configure existing cards, remove the three screws on each side of the base unit and remove the top cover. With the top cover removed, the interior of the FastPAD can be accessed. The interior is divided into two sections: the base board, and the power distribution section.

Figure 2-7: FastPAD Interior View

FastPAD Micro Interior

Figure 2-8: FastPAD Micro Interior View

Base Board

The base board contains I/O Ports for the data channels, composite link, and the NMS port. The composite and high speed interface connector slots that are used to house Interface Cards are located at the rear of the base board. There are nine connector slots at the front of the base board in the FastPAD and four slots in the FastPAD Micro. In the FastPAD, the slot closest to the power distribution section is used to house the FlashPAK. In the FastPAD Micro, the slot furthest from the power distribution section is for the FlashPAK. Jumpers are located on the base board to allow it to be upgraded or reconfigured in the field. Jumper locations are as follows.

Figure 2-9: Base Board Jumper Locations

In general, the jumpers on the current base board are set at the factory for your particular installation requirements and need not be changed. If a base board is being upgraded, an upgrade kit will describe the jumpers that need to be set for a particular upgrade procedure.

	Caution Do not change jumpers on the base board unless instructed to do so by StrataCom ISC.

W3: This jumper selects 2K EEPROM or 8K EEPROM. In the 2-3 position, 8K EEPROM is selected. This is the normal position for a FastPAD.

W7: This jumper is normally OUT. When the jumper is IN, it connects AC ground to PTT ground. Jumper IN is not allowed in certain countries. Where it is allowed, it can be used as the "fifth" wire (ground connection) for four wire E&M connections.

W8: This jumper is reserved for future use. It should be IN for normal operation.

W9 (Next to U96): This jumper is set at 1-2 for a FastPAD.

W10, W11, W12, W13, W14, W15, W16, W17, W18, and W19: These jumpers are reserved for future use. Leave jumpers IN for normal operation.

W20 and W21: These jumpers are positioned at 1-2 for any interface on the high speed data channel except RS-449. The jumper is positioned at 2-3 when RS-449 is being used on the high speed data channel.

Expansion Slots

The remaining eight slots are universal expansion connectors which are used to house Voice and Frame Relay Access modules. The slots are numbered 1 through 8 starting with the slot next to the FlashPAK. Slot numbers appear on the FastPAD rear panel.

Power Supply and Ring Transformer

Viewed from the front of the unit, the power distribution section is covered by a screen enclosure and is located on the right in the FastPAD and on the left in the FastPAD Micro. This section contains the system power supply, the ring transformer and associated AC wiring. The ring transformer provides ring voltage and loop current to the FastPAD voice channels. The input side of the ring transformer is protected by a fuse located behind the transformer. This fuse can have two different values depending on the AC operating voltage of the FastPAD (800ma for the voltage range of 90 volts to 120 volts and 400 ma for voltages of 220 volts or higher). At the rear of the power distribution area is a power strip that routes AC voltages.

 Redundant Power Supply

An optional redundant power supply is available which is identical to the primary power supply. Each is capable of providing the full power required by the FastPAD.With two power supplies installed, the load is shared between them. If one supply shuts off due to malfunction, the other will take over as the only power source.

	Warning Because of the presence of high voltages, the FastPAD must be unplugged from the AC power source before any attempt is made to remove the protective cover.

Universal AC/-48V DC Power Supply

FastPADs and FastPAD Micros include a universal AC power supply. In each case, the rear panel of the power supply will include a standard AC input plug with two fuses located directly below it. This power receptacle is a standard IEC 3-prong male power receptacle than can be used to provide AC input power to the unit. The fuse assembly is attached to the bottom of the power receptacle and contains two fuses. To remove the fuses, press down on the tab that extend out just below the power receptacle and between the two fuse holders. When replacing the fuses, make sure to use the exact type and rating marked next to the fuse holder (i.e., Time Delay 3.12 Amp 250V Fuse). A cooling fan is located at each end of the chassis next to the power supply and DC-DC/AC converter as shown in the following illustrations:

Figure 2-10: Universal AC Power Supply and DC-DC/AC Converter (top view)

The DC Power Supply models accept DC input voltages in the range 42 to 60V DC. The AC Power Supply models accept standard AC input voltages in the range 90V to 240V AC and provides standard domestic/foreign line frequencies. The 5 position switch on the DC-DC/AC Converter selects a ring voltage and frequency as shown in the Table 2-2.

Rackmount Kits

The FastPAD is mounts in a standard 19" rack, with an optional kit that includes ears that are attached to the unit and then to the rack. This must be ordered separately.

If your hardware configuration does not match what you ordered or if you have any other questions, contact StrataCom International Support Center (ISC).

English/German Warnings