ADTRAN specifications Features, Functional Description, TA 850 Backplane, Installation

chassis occupies a space the size of a piece of notebook paper. Two TA 850 systems can be mounted side-by- side in either 19-inch or 23-inch relay racks. Preconfigured packages are available.

Features

The TA 850 includes the following features:

•T1/FT1 integrated access

•TDM to ATM migration

•Modular network interface for future xDSL compati- bility

•Integrated IP/IPX router

•Integrated DSX-1 PBX interface

•V.35 Nx56/64 DTE interface

•TR-08 signaling support

•Analog FXS and FXO voice expansion (four per board)

•SNMP management

•NEBS and UL 1950 compliance

•Industry leading 10-year warranty

Functional Description

The TA 850 System comprises the chassis, common cards, and access modules. Associated with the system are additional elements including an AC to DC power supply and battery charging unit and a battery pack for backup power.

WARNING

On TA 850 installations that do not use all chassis slots, UL 1950/NEBS requires that the empty slots must have a TA 850 blank unit (part number 1175099L1) installed in the opening.

External AC and DC Power. The ADTRAN AC/DC Power Supply/Battery Charging unit receives its pow- er from a standard 115 VAC outlet. During operation, the power supply maintains -54 VDC to the PSU. The power supply battery charging circuit maintains the battery pack at peak charge. In the event of an AC pow- er failure, the battery backup circuit automatically pro- vides battery power to the PSU for up to 8 hours. When AC power is restored, input power automatically re- turns to the AC supply and the battery charging circuit will recharge the battery to peak.

On the TA 850 chassis, the incoming power termination point is on either of two backplane connections: P7 or P6. (See Figure 2.) Both sources connect directly to the PSU. Connector P6 is used when the chassis is powered by the ADTRAN AC/DC Power Supply unit (P/N 1175043L1) which mounts externally to the chassis.

Connector P7 is used when -48 VDC is available on site and screw-type terminal connections are required.

P7

P6

Figure 2. TA 850 Backplane

PSU. The Power Supply Unit supplies -48 VDC and 20 Hz ringing voltage to the Router Controller Unit (RCU) and the access modules. The PSU converts

-48 VDC input to the required voltages needed to oper- ate all common units and access modules. The ring gen- erator circuit provides 20 Hz ring voltage to the analog access modules.

The PSU faceplate (see Figure 1 on page 1) shows the following: two GMT fuses (one for power and one for 20 Hz ring voltage), a channel bank status LED, and an alarm cutoff (ACO) pushbutton switch. The separately fused ring generator supplies up to 20 REN to the access modules.

RCU. The Router Controller Unit is a dual board assem- bly that provides the network interface. The RCU can provision, test, and provide status for any card in the channel bank. The faceplate has a DB-9 CRAFT port con- nection, dual bantam jack connection, plus network, V.35, and Ethernet LEDs.

Access Modules. The TA 850 is designed to support Quad FXS, Quad FXO, OCU DP, and UBR1TE access modules.

3. INSTALLATION

Before installing the TA 850, carefully inspect the

TA 850 Base Unit for shipping damage. If you suspect damage, file a claim immediately with the carrier and then contact ADTRAN Customer and Product Service. ( See “Warranty and Customer Service” on page 6.) If possible, keep the original shipping container for re- turning the TA 850 for repair or for verification of dam- age during shipment.

Your ADTRAN shipment includes the following items (if the unit is not purchased directly from ADTRAN, it may be packaged differently):

•TA 850 chassis, PSU, RCU, and blanks

•TA 850 System Installation and Maintenance Practice

2 Issue 2, June 2000 61200376L1-5B