ET100/NRZ. Ethernet WAN Bridge. 10/100Base-TX Ethernet over NRZ

Transcription

1 ET100/NRZ Ethernet WAN Bridge 10/100Base-TX Ethernet over NRZ

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3 CTC Union Technologies Co., Ltd. NeiHu Hi-Tech Park 8F, No. 60 Zhouzi Street. Neihu, Taipei, 114 Taiwan ET100/NRZ Ethernet WAN Bridge, User Manual Version 1.01 April 6, 2009 Release This manual supports the following models: ET100/NRZ Ethernet WAN Bridge All specifications subject to change without notice.

4 LEGAL The information in this publication has been carefully checked and is believed to be entirely accurate at the time of publication. CTC Union Technologies assumes no responsibility, however, for possible errors or omissions, or for any consequences resulting from the use of the information contained herein. CTC Union Technologies reserves the right to make changes in its products or product specifications with the intent to improve function or design at any time and without notice and is not required to update this documentation to reflect such changes. CTC Union Technologies makes no warranty, representation, or guarantee regarding the suitability of its products for any particular purpose, nor does CTC Union assume any liability arising out of the application or use of any product and specifically disclaims any and all liability, including without limitation any consequential or incidental damages. CTC Union products are not designed, intended, or authorized for use in systems or applications intended to support or sustain life, or for any other application in which the failure of the product could create a situation where personal injury or death may occur. Should the Buyer purchase or use a CTC Union product for any such unintended or unauthorized application, the Buyer shall indemnify and hold CTC Union Technologies and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, expenses, and reasonable attorney fees arising out of, either directly or indirectly, any claim of personal injury or death that may be associated with such unintended or unauthorized use, even if such claim alleges that CTC Union Technologies was negligent regarding the design or manufacture of said product. TRADEMARKS Microsoft is a registered trademark of Microsoft Corp. HyperTerminal is a registered trademark of Hilgraeve Inc. User Manual Version 1.01 April 2009 Release This manual supports the following: ET100/NRZ -AC ET100/NRZ -DC This document is the latest official release manual. Please check CTC Union's website for any updated manual or contact us by at info@ctcu.com. Please address any comments for improving this manual or to point out omissions or errors to marketing@ctcu.com. Thank you. CTC Union maintains a support web site (support.ctcu.com) where you may obtain the latest manual, quick installation guide, and operational firmware. Membership to this web site is free, however, you must be a registered member in order to access any software updates. CTC Union Technologies Co., Ltd Copyright, All rights reserved.

5 Table of Contents 1.0 Overview Features Specifications Functional Block Diagram Unit Detail Theory of Operation DIP Switch Setting Tables: Data Rate Settings: Interface Settings: LAN Bridge Settings: Clocking Examples i

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7 1.0 Overview ET100/NRZ LAN-WAN Bridge The ET100/NRZ Network Bridge is a high performance, remote, self-learning Ethernet bridge. Its solid design makes it ideal for cost-sensitive bridging applications, or as a LAN extender or segmenter over NRZ bit stream type infrastructures. 1.1 Features 10BASE-T/100BASE-TX, Auto, Full Duplex or Half Duplex HP Auto-MDI/MDIX detects and corrects crossed cable IEEE 802.3x flow control enable/disable Real-time filtering with 256 MAC address table Automatic address learning, aging and deletion after 5 minutes Up to 340 packet-buffering capacity Forwarding and filtering rate at wire speed with throughput latency of 1 frame. Auto padding of undersized packets to meet the minimum Ethernet packet size requirement Buffering modes can be selected according to the setting of WAN and LAN line speeds Built-in nx64k timing clock generator for WAN link 1.2 Specifications LAN Standard Fully compliant with IEEE 802.3/802.3u Connector Shielded RJ-45 Speeds 10BASE-T/100BASE-TX, Auto, Full or Half Duplex Frames Supports 64 to 1536 byte packet lengths (supports 802.1Q pass through) WAN Interface Fixed type NRZ interface Impedance 50 Ohms Logic "1" 0V +/- 0.3V Logic "0" -1.5V +/- 0.3V Connector four (4) BNC female connectors Data Rates n x 64Kbps, where n=1 to 32 (from 64Kbps up to 2048Kbps) Clock Source Tx/Rx internal, Tx/Rx external or recovery from NRZ Rx data Ethernet Bridge Protocol Synchronous HDLC (ISO 13239) Bridge Address learning, aging and deletion after 5 minutes MAC Table 256 addresses Buffer 340 packet buffer General Power AC model: Built-in AC Switching Power, 90~250VAC, 47~63Hz DC model: Built-in DC to DC, 18~72VDC Consumption less than 5 watts Environment Temperature: 0~50 o C (32~125F) Humidity: <90% non-condensing Dimensions 235(L) x 195(W) x 45(H) mm (10.25" L x 7.675" W x 1.75" H) Weight 825g (1.8 lb.) net 7

8 ET100/NRZ LAN-WAN Bridge LED Indicators PWR Green ON Power ON OFF Power OFF TD Green ON NRZ transmit data is mark 1 OFF NRZ transmit data is space 0 Flash NRZ transmit data is changed RD Green ON NRZ receive data is mark 1 OFF NRZ receive data is space 0 Flash NRZ receive data is changed LINK Green ON Ethernet link OFF Ethernet unlink Receive Green OFF No LAN receive event ON LAN receive event Transmit Green OFF No LAN transmit event ON LAN transmit event 100M Green OFF 10Base-T ON 100Base-TX Full Green OFF Half duplex ON Full duplex Error Red OFF No LAN error event ON LAN error event Test Red OFF No loop back ON Loop back enable Loop back When the Loop back push-button switch is depressed, Received timing and data are looped back out the Transmit timing and data interfaces. NRZ RX Timing RX Data TX Timing TX Data Figure 1. ET100/NRZ Loop back paths 8

9 ET100/NRZ LAN-WAN Bridge 1.3 Functional Block Diagram TX - TClk - RX - RClk WAN SIDE 4 x BNC Female NRZ Line Transceivers WAN Tx LED WAN Rx LED SYNC HDLC CONTROLLER Clock Source Ext. clock Int. clock Full Duplex Half Duplex FILTER ENGINE plus 256 MAC Address Table IEEE802.3u I/F Auto-MDIX Phy Clock Generator SYNC SPEED N64K to 2048K Link LED LAN Tx LED LAN Rx LED LAN SIDE RJ-45 Figure 2: ET100/NRZ Functional Block Diagram 9

10 ET100/NRZ LAN-WAN Bridge 1.4 Unit Detail Figure 3: ET100/NRZ Front Panel Detail Figure 4. ET100/NRZ Unit Detail 10

11 ET100/NRZ LAN-WAN Bridge (1) PWR LED Green on, when external power adapter is plugged in and AC power is supplied to it. (2) NRZ TD LED: Green, on or flashing indicates receiving data on the NRZ interface. (3) NRZ RD LED: Green, on or flashing indicates transmitting data on the NRZ interface. (4) Ethernet Link LED: Green, indicates the Ethernet has a link to an external device. (5) Ethernet Receive LED: Green, flashes to indicate reception from the LAN. (6) Ethernet Transmit LED: Green, flashes to indicate transmission to the LAN. (7) Ethernet 100M (Speed) LED Green, on indicates the Ethernet is connected at 100M speed (Off is 10M speed) (8) Ethernet Full (Duplex) LED Green, on indicates the Ethernet is connected in Full Duplex (Off is Half Duplex) (9) Ethernet Error LED Red, when on, indicates an error condition on the Ethernet interface (10) Test LED Red, when on, indicated that the Loop back test is active (11) Loop back This pushbutton switch is used to initiate NRZ loopback towards the remotely connected device. (12) SW2, configuration DIP switch (refer to setting tables) (13) SW3, configuration DIP switch (refer to setting tables) (14) SW4, configuration DIP switch (refer to setting tables) (15) Power Switch, This toggle switch makes or breaks the power connection to the internal electronics (16) Power Input: This connector depends on the model, AC or DC. AC model uses IEC connector, while DC has a 3 pin terminal block for power connections. (17) RJ-45 Ethernet LAN Port: This is an auto-mdi/mdix port for connection to the LAN. (18) NRZ - TX Data (19) NRZ - TX Timing (20) NRZ - RX Data (21) NRZ - RX Timing (22) Card alignment slot molded into the housing 11

12 1.5 Theory of Operation ET100/NRZ LAN-WAN Bridge A bridge is used to connect networks locally or remotely such that they appear to the user to be the same network. An Ethernet LAN bridge will connect two LAN segments at the Data Link Layer (ISO Layer 2). At this layer, the MAC (Media Access Control) addresses are used for low level addressing to send information to devices. The bridge builds tables of MAC addresses for each network segment based on the source and destination addresses of the packets it receives and forwards, then filters the traffic not destined for the remote network. The Ethernet-WAN bridge will connect two remote Ethernet networks over bit stream interfaces such as that of modems or DSU/CSUs. One method to do this is to use HDLC, an international standard set by the ISO, a set of protocols for carrying data over a link with error detection/correction and flow control. The ET100/NRZ utilizes both Ethernet Bridging and HDLC encapsulation to provide a connection between LANs over bit stream architectures. The LAN side of the ET100/NRZ receives an Ethernet packet and examines its destination MAC address. If it knows the MAC is on the local network then it simply drops the packet. Otherwise, if it knows the packet destination is on the remote side, or if it cannot be determined because its MAC cannot be found in the table, then it forwards it. During forwarding, the packet is processed for transmission across the WAN link. Here is where the Ethernet packet is encapsulated in HDLC. When the HDLC packet is received on the remote side unit's data port, the packet is checked for transmission errors, then the original Ethernet packet(s) is recovered and sent out the remote's LAN port completing the transmission. Here is the typical application of the ET100/NRZ. Figure 5. Typical application of ET100/NRZ LAN-WAN Bridge. In the above application, the ET100/NRZ provides LAN bridging between two LAN segments using an NRZ transmission network. 12

13 1.6 DIP Switch Setting Tables: ET100/NRZ LAN-WAN Bridge When the ET100/NRZ is set to internal clock (SW3 3&4 OFF), then SW2-1 to SW2-5 may be used to configure the data rate and TX Timing signal's speed. If SW3 3 is ON and 4 is OFF, then all SW2-1 to SW2-5 are ignored and the unit operates by recovering the clock from the NRZ's RX Timing. SW2 3&4 OFF is the normal mode for connecting to existing NRZ that supplies clocking. In this mode the TX Timing signal is the loop back timing from the RX Timing signal Data Rate Settings: SW2 SW STATE Function Bit rate setting OFF OFF OFF OFF OFF 64K ON OFF OFF OFF OFF 128K OFF ON OFF OFF OFF 192K ON ON OFF OFF OFF 256K OFF OFF ON OFF OFF 320K ON OFF ON OFF OFF 384K OFF ON ON OFF OFF 448K ON ON ON OFF OFF 512K OFF OFF OFF ON OFF 576K ON OFF OFF ON OFF 640K OFF ON OFF ON OFF 704K ON ON OFF ON OFF 768K OFF OFF ON ON OFF 832K ON OFF ON ON OFF 896K OFF ON ON ON OFF 960K -1,-2,-3,-4,-5 ON ON ON ON OFF 1024K OFF OFF OFF OFF ON 1088K ON OFF OFF OFF ON 1152K OFF ON OFF OFF ON 1216K ON ON OFF OFF ON 1280K OFF OFF ON OFF ON 1344K ON OFF ON OFF ON 1408K OFF ON ON OFF ON 1472K ON ON ON OFF ON 1536K OFF OFF OFF ON ON 1600K ON OFF OFF ON ON 1664K OFF ON OFF ON ON 1728K ON ON OFF ON ON 1792K OFF OFF ON ON ON 1856K ON OFF ON ON ON 1920K OFF ON ON ON ON 1984K ON ON ON ON ON 2048K -6,-7,-8 Reserved Table 1: DIP settings for Data Rate. 13

14 ET100/NRZ LAN-WAN Bridge Interface Settings: SW3 SW STATE Function -1-2 Receive Timing setting OFF OFF Internal oscillator -1,-2 ON OFF NRZ interface receive timing OFF ON PLL mode (Recovery from NRZ interface receive data) ON ON Reserved -3-4 Transmit Timing setting OFF OFF Internal oscillator -3,-4 ON OFF NRZ interface receive timing OFF ON PLL mode (Recovery from NRZ interface receive data) ON ON Reserved -5 Receive timing phase setting -5 OFF Normal ON Inverted -6 Transmit timing phase setting -6 OFF Normal ON Inverted -7 NRZ side Scramble/Descramble setting** -7 OFF Disable ON Enable -8 Transmit Data latch timing phase setting -8 OFF Normal(Postive edge) ON Invert(Negative edge) ** Scramble/Descramble setting must be the same on both units in the link. Table 2: DIP settings for NRZ Interface Configuration LAN Bridge Settings: SW4 SW STATE Function -1-2 Memory Buffer configuration OFF OFF LAN to WAN 308 packets, WAN to LAN 32 packets -1,-2 OFF ON LAN to WAN 170 packets, WAN to LAN 170 packets ON OFF LAN to WAN 32 packets, WAN to LAN 308 packets ON ON Reserved -3 MDIX setting -3 OFF MDI(1:1 to HUB) ON Auto MDIX -4 Ethernet speed setting -4 OFF 100Base-TX ON 10Base-T -5 Work mode setting -5 OFF Full Duplex ON Half Duplex -6 Auto-negotiation setting -6 OFF Enable (ignore 3,4,5) ON Disable -7 Flow control setting -7 OFF Disable ON Enable -8 Filter setting -8 OFF Disable (Transparent forwarding) ON Enable (Bridge mode) Table 3: DIP settings for Ethernet Bridge Configuration. 14

15 ET100/NRZ LAN-WAN Bridge Filter: When this feature is disabled, all frames are passed transparently. In this configuration, the ET100/NRZ acts as a repeater. When the filter is enabled, frame destinations are tested against the internal MAC address table. Filtering enabled is the normal selection for Bridging but is usually disabled when connecting to a switching HUB. Auto-negotiation: When this feature is enabled (SW4-6=OFF), the Duplex (SW4-5) and Speed (SW4-4) settings are ignored and are automatically determined from the LAN connection. When this feature is disabled, the Duplex and Speed settings of the LAN follow the settings of SW4-4 and SW4-5 and auto MDIX will be disabled. Packet Buffer Utilization: The ET100/NRZ contains a 340 packet buffering capacity. When SW4-1 is OFF and SW4-2 is ON, this buffer is divided equally between LAN to WAN and WAN to LAN packet traffic. When the LAN is Fast Ethernet and the WAN connection is slow, the buffer may be better utilized by applying a greater portion to the LAN to WAN packet traffic. In this case, set both SW4-1&2 to OFF. This will provide a 9 to 1 buffer division for LAN to WAN versus WAN to LAN buffer and should increase utilization. 1.7 Clocking Examples In the following example, the ET100/NRZ is configured for bridging over synchronous NRZ data signals. One ET100/NRZ is configured with an internal clock to facilitate point-to-point application with another ET100/NRZ. The clock may be set to full 2.048Mbps or may be set to any n x 64 speed formula. The unit configured for external clock receives timing from the unit providing the NRZ clock. In this configuration, the rate DIP settings of the external clocked ET100/NRZ are ignored. TD TC RD RC Internal RD RC TD TC NRZ Receive Figure 6: Point to Point, Master (internal) and Slave (receive clock) 15

16 ET100/NRZ LAN-WAN Bridge The next example connects the pair of ET100/NRZ bridge units to existing NRZ transmission equipment which already supplies the NRZ clock to the tributary equipment. NRZ Transmission Equipment TD TC RD RC NRZ Receive RD RC TD TC NRZ Receive Figure 7: Point to Point, over existing NRZ equipment (recovery clock) In this final example, the ET100/NRZ is operated without any dedicated clocking lines. In the point to point example, one unit is configured with internal transmit clock and the data rate is set by DIP switch for n x 64. The slaved unit uses PLL (Phase-Locked Loop) timing to recover the clock from the received NRZ data stream. In environments where there may be long data streams of all zeros, the PLL recovered clocking may not be stable. This can be corrected by enabling the "scrambling" function on both units. The scrambling function will ensure that the data stream has adequate pulses for clock recovery by using special line coding. Note: Both units must have the scrambling setting either enabled or disabled, or they will not be able to communicate properly with each other. TD TC RD RC Internal RD RC TD TC PLL Mode Figure 8: Point to Point, without clock lines by using a PLL to recover clock 16

17 CTC Union Technologies Inc Fax: (886) Attn : Technical Support Department From Company: Name: Tel: ( ) Fax:( ) Tel: (886) techsupport@ctcu.com MODEL: ET100/NRZ SYS CONFIGURATION: ACTIVITY: As attached in DIP switch setting table Question

18 Technical Inquiry Form MODEL No.: ET100/NRZ Please fill in the DIP switches configuration with ' ' marks into the following table. Send it to us by fax, and we will reply to you immediately. Your Setting CTC Suggestion SW NO. DIP FUNCTION ON OFF ON OFF SW1 na Loop Back X SW2 1-5 TX Clock Rate (Internal) SW2 6-8 reserved SW3 1 Rx Timing Setting X SW3 2 Rx Timing Setting X SW3 3 Tx Timing Setting X SW3 4 Tx Timing Setting X SW3 5 Rx Timing Phase X SW3 6 Tx Timing Phase X SW3 7 NRZ Scramble mode X SW3 8 Tx Data Latch X SW4 1 Bridge Buffer Conf. X SW4 2 Bridge Buffer Conf. X SW4 3 MDIX Setting X SW / 100Base manual X SW4 5 Full / Half Duplex manual X SW4 6 auto negotiation / manual X SW x Flow Control l X SW4 8 Bridge Filter X Additional comments/questions:

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