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Summary of Contents for Tahoe TAHOE 671
- Page 1 ANUAL G.shdsl+ modem with G.703 interface TAHOE 671 FREEDOM OF COMMUNICATION...
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Page 3: Table Of Contents
TABLE OF CONTENTS 1. Introduction ................. 1 2. Interfaces ................2 3. Modem configuration using built-in keyboard and LCD . 4 4. Configuration using serial console ........10 5. Technical data ..............12 6. Declaration of Conformity ..........13... -
Page 4: User Manual
Other trademarks of other companies are used only for explanation and to the owner's benefit, without intent to infringe. ® Tahoe assumes no responsibility for any errors or omissions that may appear in ® this document. Tahoe makes no commitment to update the information... -
Page 5: Introduction
Introduction Thank you for purchasing the Tahoe 671 modem. We did our best to ensure highest reliability and performance of our products. Devoting many years of research and development we are proud to provide a superior quality device unfolding new possibilities for the use of the copper lines. -
Page 6: Interfaces
Interfaces Following connectors are found on the rear panel of the modem: serial power power G.shdsl G.703 connector console switch 2.1. G.shdsl It is a 6-pin RJ-11 connector used to connect the leased line. The line should be connected to the two central pins (3 and 4). The polarization of a line is not important. - Page 7 G.703 The G.703 port has a RJ-45 connector. The G.703 standard doesn’t specify the connector pinout, but the pinout used in Tahoe devices is the most common in the industry, thus in most cases a regular straight patch-cord may be used to connect the card to the external device.
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Page 8: Modem Configuration Using Built-In Keyboard And Lcd
The easiest way to configure a modem is to use the four-button keyboard and the LCD. After switching the power on, an information about the modem type, the line throughput and state will be displayed: Tahoe 671 2048 kb/s BOOT... - Page 9 primary display with modem type and state. Pressing of the “Enter” button selects given menu option. 3.1. Throughput setting Line rate: 2048 kb/s (1984) After pressing Enter the throughput may be set using up/down buttons. It may be chosen from 128-2048 kbps range. In the framed mode the first number depicts the DSL line speed, while the second one - a sum of G.703 timeslots used for transmission.
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Page 10: Line Coding
3.2. Modem type Modem type: Master / HTU-C After pressing Enter the modem type may be selected - either Master (HTU-C) or Slave (HTU-R). After selecting the type and pressing Enter again the connection will be reset and renegotiated with new settings. - Page 11 be either enabled or disabled. 3.5. G.703 coding G.703 line code: HDB3 The G.703 port may use one of two available codings - HDB3 and AMI. The first one is used in most cases, the second one is provided for compatibility only.
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Page 12: Modem Reset
3.9. Language selection Language: English After pressing “Enter” the language used on the LCD and the serial console may be changed. 3.10 3.10. Write configuration to EEPROM Write config to EEPROM Every change to the configuration will be lost after reboot or power off unless the settings are written to the EEPROM. - Page 13 Pressing Enter again will show so-called Noise Margin (or Signal- Noise Ratio). This is the difference between the useful signal and the background noise. It may be used to estimate, how much the line rate may be increased without causing any problems with the synchronization.
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Page 14: Configuration Using Serial Console
Modem configuration using the serial console After connecting the converter to a PC, running a VT-100 terminal emulation software and switching the modem on a menu will appear: main menu G.703 port state DSL parameters DSL state log containing most important time elapsed since firmware version information about modem status... - Page 15 4.1. Manage remote modem It is possible to manage the remote modem through the DSL line. First the modems must reach the synchronized state. Then after selecting this option modems will establish a connection in so-called Embedded Operations Channel (EOC, separate from the main data channel).
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Page 16: Technical Data
Technical data processor: Motorola MC68302 G.shdsl interface: connector: RJ-11 standards: ITU G.991.2 (G.shdsl) ITU G.994.1 (G.hs) modulations: TCPAM-32, TCPAM-16, TCPAM-8, TCPAM-4, PAM-16, PAM-8, PAM-4, PAM-2 throughput: 128 - 2048 kbps G.703 interface: framed according to G.704 or unframed balanced, 120 , RJ-45 connector throughput: 64-1984 kbps or 2048 kbps line coding:... -
Page 17: Declaration Of Conformity
89/336/EEC EMC requirements 99/5/EEC radio & telecommunication terminal equipment requirements The compliance of Tahoe 671 with the requirements of the above mentioned directives is ensured by complete application of the following harmonized European Standards: EN 60950:2000 EN 55022:1998 EN 61000-6-1:2002... - Page 20 TAHOE ® Uniwersytecka 1 50951 Wroc³aw, Poland phone +48 50 100 7362 fax +48 71 344 2642 http://www.tahoe-group.com/...
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