Testing

Loopbacks can be started from a variety of points in the network, as shown in

Table 5-1.

Table 5-1. Device Messages

Loopback Type

Initiated By

Notes

 

 

 

 

Bilateral Loopback

H

User

When enabled, running a DSU loopback

 

H

Remote unit sending

also automatically starts a local

 

loopback. Refer to Data Port Options,

 

 

V.54 sequence

 

 

Table A-3, to enable.

 

 

 

 

 

 

 

CSU Loopback

H

User (Network tests)

When initiated by the network, CSU

 

H

DDS Network, by

Loopback cannot be disabled by the

 

user.

 

 

loop current reversal

 

 

 

 

 

 

 

DSU Loopback

H

User

Refer to Data Port Options, Table A-3.

(Digital)

 

 

 

 

 

 

 

Local Loopback

H

User

Control via CT141 can be disabled.

 

H

DTE via CT141

Refer to Data Port Options, Table A-3.

 

 

 

 

 

 

Network-initiated

H

DDS Network

Cannot be disabled by user.

56 kbps DSU

 

 

 

Loopback (Non-

 

 

 

latching loopback)

 

 

 

 

 

 

 

Network-initiated

H

DDS Network

Includes optional data scrambling and

64 kbps CC DSU

 

 

uses 25-second timer to detect the

Loopback

 

 

network sequence. Can be disabled by

(Latching loopback)

 

 

user.

 

 

 

 

Remote Digital

H

Remote unit sending

Same as a DSU Loopback but initiated

Loopback

 

V.54 sequence

by a remote unit via V.54 sequence.

 

 

 

Can be disabled locally. Refer to

 

 

 

Network Interface Options, Table A-2.

 

 

 

 

V.54 Sequences to remote unit

HUser

HDTE via CT140

Control via CT140 can be disabled. Refer to Data Port Options, Table A-3.

5-2

March 1997

7510-A2-GB20-00

Page 35
Image 35
Paradyne 727 manual Device Messages Loopback Type Initiated By, Network Interface Options , Table A-2

727 specifications

The Paradyne 727 is a cutting-edge piece of networking equipment that stands out for its robust performance and versatility in various technological environments. Designed primarily as a digital subscriber line (DSL) modem, the Paradyne 727 has gained significant traction among service providers looking to enhance their broadband offerings for residential and business customers.

One of the main features of the Paradyne 727 is its ability to support both Asymmetric Digital Subscriber Line (ADSL) and Very-high-bit-rate Digital Subscriber Line (VDSL) technologies. This dual compatibility allows for flexible deployment in different network infrastructures, whether in urban areas with high demand for broadband or in rural areas where DSL remains a feasible option. The device is capable of delivering high-speed internet access with downstream rates that can reach up to 24 Mbps for ADSL and up to 50 Mbps for VDSL, ensuring faster connectivity for users.

The Paradyne 727 is also equipped with advanced modulation technologies, such as discrete multitone modulation (DMT), which provides a superior noise immunity and allows for higher data rates over traditional DSL technologies. This capability makes it particularly beneficial in environments with varied signal quality. Moreover, the modem features an auto-sensing capability that helps it adjust to the best transmission parameters automatically, simplifying installation and maintenance for service providers.

Another significant characteristic of the Paradyne 727 is its user-friendly design. The device incorporates an intuitive web-based management interface that allows network administrators to efficiently monitor performance metrics, configure settings, and perform troubleshooting from a centralized location. This feature streamlines operations and minimizes downtime, which is crucial in maintaining service quality and customer satisfaction.

In addition to its performance and management features, the Paradyne 727 is built with security in mind. It supports both local authentication and RADIUS authentication, providing robust access control mechanisms to protect sensitive data and ensure that only authorized users can access the network. This emphasis on security contributes to the modem's appeal in enterprise settings, where data integrity is paramount.

With its comprehensive features, advanced technologies, and commitment to performance and security, the Paradyne 727 is a significant player in the world of broadband networking. Its adaptability makes it suitable for a wide range of applications, supporting the growing demand for high-speed internet access across various market segments.