Related Manuals for E3Switch DS3
Summary of Contents for E3Switch DS3
- Page 1 PPPoE Ethernet to Single/Dual DS3/E3 Network Extender March 1 , 2015 Operating Information...
- Page 2 E3Switch reserves the right to revise or update its products or documentation without obligation to notify any individual or entity. Please direct all inquiries to:...
- Page 3 derived for commercial and industrial environments to provide reasonable protection against interference with licensed communication equipment. Attention: This is a Class A product. In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures. International Electrotechnical Commission (IEC) Statement...
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Page 4: Table Of Contents
Dedicated Management/PPPoE-Data LAN Ports................14 VLAN ................................14 IP / V ..................14 IDEO OR RIORITY RAMES ................14 ISABLE AND ETURN ERVICE ELAY DS3/E3 Return to Service delay......................15 Auto-Disable..........................15 6: I ........................15 HAPTER NTEROPERABILITY ................................15 Autonegotiation problems........................15 SFP LAN Port 1..........................15 Pause Frames............................16 VoIP / Video or High-CoS Priority Frames..................16... - Page 5 LAN B ..................17 UFFERING OADING AND ONTROL LAN P ..........................18 ACKET RIORITY TCP/IP ...................18 ENERAL ERFORMANCE UNING 9: DS3 P ..................18 HAPTER ACKETS AND OPOLOGY ............................18 RRORS 10: T ........................18 HAPTER ROUBLESHOOTING ..............................18 ENERAL .............................19 OOPBACK OF Terminology............................19 Limitations............................19...
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Page 6: Chapter 1: Description And Requirements
The converter will buffer data, and implements flow-control and quality-of-service mechanisms to eliminate data loss. The converter can generate its own DS3/E3 transmit clock or use the incoming DS3/E3 received clock. The converter will pass all PPPoE error-free packets unaltered which do not exceed 9600 bytes in length. - Page 7 Attach two 75-ohm coaxial cables from either the Port 1 or Port 2 BNC connectors of the converter to the input and output connectors of your E3 or DS3 link. Once each converter is receiving a valid signal from the remote partner, the DS3/E3 Port LED will change from orange to green. This indicates that the converter has achieved proper sync lock with the remote ISP, but does not indicate PPP session status or proper settings of CRC-length or scrambling or framing.
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Page 8: Chapter 3: Front Panel
Orange steady for absence of DS3/E3 receive signal, loss of frame lock onto receive bit-stream, drive-level fault on transmit cable, or excessive receive bit errors. Note: In a dual DS3/E3 unit, the BER will reflect the status of the operational link if one fails. LAN1/2: Green when a properly negotiated 100/1000BaseTX Full-Duplex or SFP LAN connection exists. -
Page 9: Automatic Link-Local Ip Address
The converters negotiate between themselves to determine which converter is assigned name e3switch.local and which receives e3switch-2.local and so on. Since the assigned name will not necessarily be fixed to a particular converter after power cycles, the system manager will probably want to use/set the converter's numeric IP address sometime during or after initial installation. -
Page 10: Security
The converter contains a comprehensive, user-friendly HTTP management interface which allows a manager to monitor bit-error-rates on the DS3/E3 link, lost packets, and user-friendly status messages at a single, color-coded HTTP screen. A screenshot is available at www.e3switch.com. Most settings that can be modified via SNMP can also be set through the HTTP interface in a more user-friendly manner. -
Page 11: Event Log File
Statistics and settings accessible via SNMP are called MIB-variables and are organized in a hierarchical tree topology. The MIB variable trees implemented by the converter include recent versions of the DS3/E3, interface, MAU, dot3, and many of the typical IP-network MIB trees. The full list of MIB trees available is listed by viewing the system.sysORTable of the converter. -
Page 12: Chapter 5: Operating Modes And Configuration
The cable length setting will transmit a slightly stronger signal on long DS3 coax runs. The M13/C-Bit setting sets the AIC bit in DS3 frames to either 0 or 1. This bit is typically ignored by the DS3 carrier; however DS3 carrier equipment set to auto-sense the incoming DS3 framing type will need this setting to be correct. -
Page 13: Packet Flow
LAN-to-LAN flow can result in dropped packets if the destination LAN port bandwidth setting is too low. An example would be 2x 44Mbit/s traffic from a dual-DS3 and > 12Mbit/s traffic from the other LAN port exceeding 100Mbit/s of a 100Base-TX LAN port which was receiving both DS3 and LAN-to-LAN traffic. -
Page 14: Autonegotiation Problems
1000Mbit/s LAN port speed may be desirable when one LAN port is configured to monitor the other LAN port in addition to receiving incoming DS3/E3 data. In such a case, the data rate that the LAN port is expected to transmit (the sum of all ports that could be a data source for the LAN port) may be greater than 100Mbit/s. -
Page 15: Ds3/E3 Return To Service Delay
Chapter 5: Operating Modes and Configuration DS3/E3 Return to Service delay The return-to-service delay prevents network topology thrashing if a telecom link is flapping up and down. Some telecom carriers will interrupt service for 50msec, once per day as a link test. A configurable, failure- time setting to prevent such tests from triggering a link-down, retun-to-service delay. -
Page 16: Pause Frames
Chapter 7: Telecom Connections Framing and Physical Link The converter can transmit the LAN data over a variety of E3, T3/DS3 links (with the appropriate media converter) such as fiber optic, microwave radio, laser, copper, satellite, or a combination. The converter may be used with a standard (i.e., M13, M23, clear-channel, C-Bit or G.751) framed or unframed, E3 or... -
Page 17: Chapter 8: Lan Connections And Performance
The maximum length of each cable shall be 440 meters for E3 or 300 meters for T3/DS3, but the acceptable cable lengths of equipment attached to the converter must be met as well. For lengths over 135 meters, testing in field should be used to determine whether bit error rates are acceptable. -
Page 18: Lan Packet Priority
Chapter 9: DS3 Packets and Link Topology Link Bit-Errors The converters at each end of the link will maintain synchronization with each other even at very high DS3 bit-error rates. The converter will count and drop packets with FCS/CRC and length errors. -
Page 19: Loopback Of Ds3
The next most frequent source of problems can arise from the E3, T3/DS3 link configurations or faults – in other words, the microwave radio or fiber optic link or the interface and associated configuration settings between such equipment and the converter. -
Page 20: Alternatives To Loopback
Chapter 10: Troubleshooting Alternatives to Loopback Loopback is not typically the best way to diagnose or confirm a DS3 connection. Here are some alternatives: · Web Management: User-friendly status messages will appear at the top of the converter's web management status page. Errors are highlighted in orange. Sophisticated error detection status, such as frame-slip, is only available through this interface mechanism. -
Page 21: Performance
The PPPoE connection to a converter may be tested before introducing a complicated E3 or T3/DS3 link. The DS3 link does not have to be present to confirm a successful PPPoE connection via the LAN port and the status and log messages of the converter's HTTP interface. -
Page 22: Step-By-Step Diagnosis
3. If the ISP indicates it is not receiving a valid DS3 from the E3Switch unit, check the TX path starting at the local unit. Ensure the carrier believes the link is set up in unchannelized mode (not subdivided into T1 or E1 channels). - Page 23 If the local LAN light blinks with each packet, next verify that the packet traverses the link by monitoring the DS3 Port light at the remote converter. If the remote DS3 Port light does not blink, there is either a link malfunction or an interface configuration problem or failure between the converter and the link.
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Page 24: Chapter 11: Third Party Copyright Notices
E3Switch is grateful for and contributes to open source software development which may be protected by the following copyright notices and license terms: eCos License E3Switch gratefully acknowledges the contributions of the eCos developers and community. Current eCos source files are available at http://ecos.sourceware.org/ E3Switch implementation-specific modifications to those files are available by contacting E3Switch LLC. -
Page 25: The Apache License
Chapter 11: Third Party Copyright Notices THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;... -
Page 26: The Sha2 Copyright
Chapter 11: Third Party Copyright Notices "Legal Entity" shall mean the union of the acting entity and all other entities that control, are controlled by, or are under common control with that entity. For the purposes of this definition, "control" means (i) the power, direct or indirect, to cause the direction or management of such entity, whether by contract or otherwise, or (ii) ownership of fifty percent (50%) or more of the outstanding shares, or (iii) beneficial ownership of such entity. -
Page 27: The Bzip2 License
The BZIP2 License E3Switch gratefully acknowledges Julian Seward, Cambridge, UK. jseward@bzip.org for his selfless contribution of bzip2/libbzip2 version 1.0.4 of 20 December 2006 The atHTTPD License E3Switch gratefully acknowledges Anthony Tonizzo (atonizzo@gmail.com) for his selfless contribution of athttpd to the eCos community. -
Page 28: Chapter 12: Technical Specifications And Standards
ANSI T1.102-1993, Telcordia TR-NWT-000499 and GR-253-CORE, ITU-T G.703. Compliance: DS3/E3 Cabling: DS3/T3: 300 meters; E3: 480 meters to radio/CSU; BNC – 75ohm one rx, one tx. DS3/E3 Frame Lock: 250ms typical lock time. Lock maintained up to 10 BER typically.