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Total Access 1500 Single 4-Wire ETO Access Module ... - Adtran

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4. PROVISIONING<br />

There are no hardware options in the 4W <strong>ETO</strong> access<br />

module; its specific options can be provisioned from the<br />

SCU ADMIN port or remote craft interface. The factory<br />

default settings for the 4W <strong>ETO</strong> access module are<br />

noted in bold text in Table 4 and Table 5.<br />

Table 4. 4W <strong>ETO</strong> General Options<br />

Function Option Description<br />

Transmit TLP –18.0 to +7.5 dBm (+0.0) Sets the transmit channel attenuation in 0.1 dBm increments<br />

from the customer to the network.<br />

Receive TLP:<br />

150 and 600 ohms<br />

1200 ohms<br />

Sealing Current Mode None<br />

Sink<br />

Source<br />

Tx Termination (1) 150 ohms<br />

600 ohms<br />

1200 ohms<br />

Rx Termination (1) 150 ohms<br />

600 ohms<br />

1200 ohms<br />

Equalizer Options Height<br />

Bandwidth<br />

Slope<br />

Cable Type<br />

–18.0 to +7.5 dBm (+0.0)<br />

–20.0 to +5.5 dBm (+0.0)<br />

Sets the receive channel attenuation, in 0.1 dBm increments<br />

from the network to the customer.<br />

Sets the sealing current mode of operation.<br />

Selects the impedance of the Transmit T/R pair from the<br />

customer toward the T1 network.<br />

Selects the impedance of the T1/R1 pair toward the customer.<br />

See Table 5 for detailed descriptions of the equalizer<br />

provisioning options.<br />

Note: Defaults are in bold type.<br />

(1) Although no restrictions are placed on the termination settings relative to the equalizer settings, the following configurations<br />

are typical: 600 ohms and 1200 ohms impedances can be used in conjunction with active equalization.<br />

The 150 ohms and 600 ohms impedances can be used with mismatched equalization. The 600 ohms impedance can<br />

also be used on short nonloaded loops where no equalization is necessary.<br />

Table 5. 4W <strong>ETO</strong> Equalizer Options<br />

Function Option Description<br />

Height 0 to 15 In conjunction with Bandwidth Equalization, corrects for<br />

frequency response degradation at the high end of the voice<br />

range due to cable length by increasing the 3250-Hz equalization<br />

bump.<br />

Bandwidth 0 to 15 In conjunction with Height Equalization, corrects for frequency<br />

response degradation at the high end of the voice range due to<br />

cable length by increasing the breadth of the equalization bump.<br />

Slope 0 to 15 Corrects for frequency response degradation at the low end of<br />

the voice range due to cable length.<br />

Cable Type Non-Loaded<br />

Loaded<br />

Used to specify loaded or nonloaded cable. This option modifies<br />

the equalization circuitry to provide greater gain at the higher<br />

frequencies when transmitting over nonloaded cable.<br />

61180113L2-5A Issue 1, October 2003 5

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