AT&T Synapse Instalační příručka stáhnout pdf (Strana 34)

Synapse Installation Guide Back to Contents

Installation 33

Grounding

The SB67010 PSTN Gateway, SB67060 T1 Gateway, SB67070 SIP Gateway, and the

SB67050 Analog Terminal Adapter must be connected to reliable earth ground. The

connection to earth ground must be verified by qualified personnel.

The SB67010 PSTN Gateway must be connected to reliable earth ground using the

supplied ground wire connected to a terminal on the back of the Gateway chassis.

The SB67060 T1 Gateway and SB67070 SIP Gateway must be connected to reliable earth

ground through a separate ground wire connected to a terminal on the back of the

Gateway chassis before connecting the T1 cable or LAN cable.

The SB67050 Analog Terminal Adapter is connected to earth ground through a properly

grounded wall outlet. Additional grounding may be necessary for the ATA if you need to

improve immunity to Electrostatic Discharge (ESD) and to minimize the possibility of

electrical interference when using third-party audio equipment.

To provide additional grounding, the ATA can be connected to reliable earth ground

through a separate ground wire connected to a terminal on the back of the ATA chassis.

To ground the Gateway or ATA:

1. Acquire a grounding cable of 18 AWG or greater gauge. For the PSTN Gateway, use

the supplied grounding cable.

2. Locate the device near the building ground point, usually located at the electrical

breaker box. The PSTN Gateway must be within three feet (91.4 centimeters) of the

building ground point.

3. Loosen the grounding terminal screw on the back of the device, as identified in

Figure 12 and Figure 13.

Figure 12. PSTN Gateway Grounding

Figure 13. T1 Gateway, SIP Gateway, and ATA Grounding

4. Insert the end of the grounding cable under the grounding terminal.

If you are unsure about the location of the building ground point or how

to ground the device, contact the facilities manager.

Grounding Terminal

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AT&T Synapse Instalační příručka Strana 34