ADTRAN T200 IDSL Manual de usuario descargar pdf (Pagina 20)

20 Issue 1, May 2004 61292023L5-5A

NOTE

Real-time terminal update is recommended for

normal terminal operation unless screens are to

be captured or logged to a print file.

5. REMOTE PROVISIONING AND

DIAGNOSTICS

Control Protocol

Remote access to provisioning and status information is

accomplished using ADTRAN Digital System 6

Message protocol, defined in Control and Diagnostic

Procedures Practice, Section 6032991-6. Digital

System 6 is supported by the TPI 108/109 and 105

portable test set and is supported by Hekimian React

2001 Release 1.900 remote test system. The Total

Reach DDS network elements comply with ANSI

T1.107-1995, “Digital Hierarchy Format Specifications

Annex G” which allows remote provisioning, querying,

and performance monitoring via inband control of

network elements.

NOTE

The REACT 2001 GUI software Release 1.900

supports ANSI T1.107-1995.

Remote access is accomplished using a defined set of

inband DS0 byte sequences similar to the latching

loopback sequence. Commands issued through the test

system are recognized by the individual channel unit,

which responds with the appropriate byte sequences.

These inband commands may be used to verify options

via dialogs with REACT 2001 and TPI 108/109 test

sets. Unit CLEI, serial number, provisioning, and

performance information can be retrieved remotely

using the Digital System 6 protocol.

6. DEPLOYMENT GUIDELINES

The Total Reach DDS CO unit and Total Reach OCU-

R use technology intended to eliminate the need for

repeaters and concerns over impairments caused by

typical noise and bridged tap. Listed below are the loop

design guidelines for Total Reach DDS (see Table 7 and

Tab le 9 for more information):

• All loops must be nonloaded.

• Actual Measured Loss (AML) should not exceed 50

dB at 13.3 kHz (135 ohms termination), the Nyquist

frequency of Total Reach DDS.

NOTE

The 50 dB AML limit includes 6 dB of signal

margin to account for potential near-end cross

talk (NEXT) from other digital services that

may be provisioned in the same binder group.

• Loop length should not exceed 50 kft.

• Bridged tap tolerant to 12 kft (tests show no degra-

dation to 18 kft).

• Background noise level should not exceed 34 dBrn.

• Impulse noise should not exceed –40 dBm

(+50 dBrn).

NOTE

Measure noise with 50 kbit weighting charac-

teristic approximating a filter with a passband

of 40 Hz to 30 kHz. Background noise level or

impulse noise level is referenced from 56/64

kbps data rate in TR62310.

Table 9. Total Reach DDS Insertion Loss

Measurements

Total Reach DDS

13.3 kHz compared to 28 kHz for traditional DDS

service

Line Configuration @ 13.3 kHz @ 28 kHz

27 kft 26 AWG 50.12 dB 65.35 dB

36.25 kft 24 AWG 50.00 dB 62.50 dB

50 kft 22 AWG 50.24 dB 59.33 dB

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