High performance access device

“qBRIDGE”

User’s Manual

qBRIDGE-101

Ethernet to E1 Converter/Bridge

Moscow 2007

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qBRIDGE-101. Ethernet to E1 converter/Bridge. User’s manual v.6

Contents

Attention

Revision history .......................................................................................................................................................... 3

1. Introduction............................................................................................................................................................. 4

1.1. Purpose and area of application ......................................................................................................................... 4

1.2. Advantages....................................................................................................................................................... 5

1.3. Features ............................................................................................................................................................ 5

1.4. Connectors, LED indicators and DIP-switches................................................................................................... 6

1.5. Application information .................................................................................................................................... 7

2. Device Configuration............................................................................................................................................... 7

2.1. Powerup ........................................................................................................................................................... 7

2.2. LAN: Frame buffer configuration (SW1.4 – SW1.3).......................................................................................... 9

2.3. LAN: Filtering mode (SW1.2)........................................................................................................................... 9

2.4. LAN: IEEE 802.3x flow control (SW1.1) .......................................................................................................... 9

2.5. WAN (E1): Mode selection (SW2.8) ................................................................................................................. 9

2.6. WAN (E1): Time slots selection (SW2.7 – SW5.1).......................................................................................... 10

2.7. WAN (E1): Receive equalizer gain limit (SW6.8)............................................................................................ 10

2.8. WAN (E1): CAS signaling (SW6.7) ................................................................................................................ 10

2.9. WAN (E1): CRC4 multiframe (SW6.6) ........................................................................................................... 10

2.10. WAN (E1): Transmit clock source selection (SW6.5) .................................................................................... 11

2.11. WAN (E1): Automatic remote alarm indication (SW6.4 - SW6.3).................................................................. 11

2.12. WAN (E1): Idle code (SW6.2) ...................................................................................................................... 11

2.13. WAN (E1): Remote loopback (SW6.1).......................................................................................................... 11

Appendix A. Connector pin-outs................................................................................................................................ 12

Appendix B. Ordering information ............................................................................................................................ 12

Appendix C. Checking in the box .............................................................................................................................. 12

When you receive devices you need to check your box and make sure that all items are inside (see

Appendix B). Especially check the presence of all required cables and certificate of guarantee. The absence of certificate of guarantee with mark of distributor is a reason for refusal in after-sales service and technical support from NSGate LTD.

© NSGate LTD 2007

NSGate

qBRIDGE-101. Ethernet to E1 converter/Bridge. User’s manual v.6

Revision history

•

10.05.2006 First release of this document

•

12.10.2006 Paragraph 2.3 and ordering information have been reviewed

•

03.03.2007 Ordering information has been reviewed

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qBRIDGE-101. Ethernet to E1 converter/Bridge. User’s manual v.6

1. Introduction

1.1. Purpose and area of application

qBRIDGE – is a series of low cost and high performance access devices (modems/ converters) functioning in “Bridge connection” mode. They are meant for connecting together distant segments of Ethernet

10/100Base-TX LANs using different technologies of data transmission over copper or fiber lines. qBRIDGE is a high performance bridge that encapsulates Ethernet frames into HDLC frames and visa versa. Peak performance is 90000 frames per second. Frame buffer capacity is 340 frames. It’s possible to use any synchronous serial interface as a WAN port. WAN interface speed is up to 50 Mbps. User can choose WAN interface type from a set of already available interfaces. There is a possibility of manufacturing devices with

WAN interface by customer request. The “Bridge connection” mode provides transport for any protocol including TCP/IP, IPX and so on. qBRIDGE supports transparent transmission of “long” Ethernet frames with

VLAN tag.

All qBRIDGE modifications can be used for point to point connection of distant LAN segments. Moreover it’s possible to use some modifications for point-multipoint connection for example to connect remote users to

ISP. qBRIDGE-105 [sdsl] can be used as a CPE for 8-port mini-DSLAM NSG-800/maxS-8. qBRIDGE-106

[g.shdsl] can be used as a CPE for 24-port Ethernet-based mini-DSLAM NSG-800/maxS-24. qBRIDGE series include modifications listed below: qBRIDGE-100 : Bridge with one port 10/100M Ethernet & one port G.703 (E1 Unframed) qBRIDGE-101 : Bridge with one port 10/100M Ethernet & one port E1 (E1 F ramed/ Unframed) qBRIDGE-201 : Bridge with one port 10/100M Ethernet & two ports E1 (E1 F ramed/ Unframed) qBRIDGE-401 : Bridge with four ports 10/100M Ethernet & four ports E1 (E1 F ramed) qBRIDGE-102 : Bridge with one port 10/100M Ethernet & one port E2 qBRIDGE-103 : Bridge with one port 10/100M Ethernet & one port E3 qBRIDGE-105 : Bridge with one port 10/100M Ethernet & one port SDSL qBRIDGE-106 : Bridge with one port 10/100M Ethernet & one port G.SHDSL qBRIDGE-206 : Bridge with one port 10/100M Ethernet & one/two/four ports G.SHDSL.bis

qBRIDGE-101 is a high performance converter/bridge. It’s suitable for connecting distant LAN segments using standard E1 lines (E1 Framed/ Unframed ). qBRIDGE-101 has Framed/Unframed 2.048 Mbps

G.703 interface with maximum rich 2 km over 24AWG cable. Furthermore it can be used on dedicated lines. qBRIDGE-101 supports all functionality of qBRIDGE-100 with additional features: line speed selection from

64 to 2048 Kbps with 64 Kbps (one time-slot) step; automatic alarm generation; fractional E1 mode; remote loopback. All configuration is done using DIP-Switches. No terminal emulation program is needed.

The product is available as a standalone unit in metal case or as a card for 19" rack 6U.

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qBRIDGE-101. Ethernet to E1 converter/Bridge. User’s manual v.6

1.2. Advantages

•

Simple configuring using DIP-switches

•

Ethernet 10/100Base-TX with auto-negotiation & auto-MDIX

•

VLAN Support: VLAN tag pass-through

•

High performance: Filtering and Forwarding- 90,000 pct/s; Frame Buffer- 340 frames

•

Small-size metal case or card for 19" rack 6U form factor

1.3. Features

LAN

•

IEEE 802.3/802.3u; IEEE 802.3x flow control

•

Half / Full duplex: 10/100Mbps - Half Duplex / 20/200Mbps - Full duplex

•

Auto-negotiation 10/100 Mbps & Auto-MDIX

•

Connector: RJ-45

“Bridge connection” mode

•

IEEE 802.1D transparent learning bridge

•

256 MAC-address table

•

IEEE 802.1q VLAN pass-through

•

Filtering and Forwarding: 90,000 packets/sec; Delay: 1 frame

•

Frame Buffer size – 340 frames

WAN port: Е1 Framed/Unframed

•

ITU–T G.703

•

Line speed: 64÷2048 Kbps

±

0,005% with 64 Kbps step full duplex

•

Line coding: HDB3

•

Line: 120Ω two-pair twisted cable

•

Fractional E1 mode

•

Automatic alarm generation

•

Remote loopback

•

Jitter tolerance according to ITU–T G.823

•

Improved receiver sensitivity: -43 dB at

•

Connector: RJ-45

1024 KHz

•

Selectable G.703 transmit clock source: local oscillator or recovery from E1 line

Other features

•

LED indicators

•

Dimensions: 182×140×30 mm

•

Power: 36÷72V DC or external 100÷240V AC to 9V DC adapter

•

Power consumption: 2W

•

Temperature: 0 ÷ 45 ºC

•

Humidity: 0 ÷ 95% without condensation

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qBRIDGE-101. Ethernet to E1 converter/Bridge. User’s manual v.6

1.4. Connectors, LED indicators and DIP-switches

LEDs

: LED indicators show state of qBRIDGE.

LEDs description:

PWR:

LAN 100M:

LAN 10M:

WAN LOS:

WAN LOF:

On when power is applied to the device

ON/Blinking when LAN port is in 100 Mbps mode

ON/Blinking when LAN port is in 10 Mbps mode

ON when the E1 line interface detects a loss of carrier

ON when the E1 synchronizer is searching for the frame FAS/NFAS (LOF, loss of frame) and multiframe CAS MFAS (CAS LOMF, loss of CAS multiframe), CRC4 (CRC4 LOMF, loss of CRC4 multiframe)

WAN ALM: This LED is refreshed every second.

ON (green) when RAI (ITU-T

O.162 2.1.4) received

ON (red) when AIS (ITU-T

O.162 1.6.1.2) received

ON (yellow) in remote loopback mode

WAN ERR: This LED is refreshed every second.

ON (green) when there was less than 1E-3 line coding violations

ON (red) when there was more than 1E-3 line coding violations

WAN ACT:

Connectors:

ON (yellow) in remote loopback mode

Blinking when receiving/transmitting data through WAN port

Device has LAN connector (RJ-45), WAN connector (RJ-45) and power connector on the rear panel

DC-IN:

LAN:

WAN:

9 V or 36÷72 V DC power supply (see ordering information)

Ethernet 10/100BaseT (RJ–45 connector)

E1 WAN port (RJ–45)

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qBRIDGE-101. Ethernet to E1 converter/Bridge. User’s manual v.6

1.5. Application information

E1

E1

SDH/PDH qB-101 qB-101

…

Ethernet

…

Ethernet

Application 1. Connection of remote LANs over E1 channel

7

2. Device Configuration

2.1. Powerup

1. Configure qBRIDGE according paragraphs 2.2 – 2.13 of this manual.

2. Connect LAN port of the device to HUB/Switch or to a PC using a Patch Cord. Device supports auto-MDIX therefore Patch Cords cable may be any type (cross or straight).

3. Connect WAN port (connector with “WAN” mark) to E1 channel. Use a cable with RJ–45 connector.

4. Connect power adapter (DC 9 V) or 36 ÷ 72 DC power supply (see ordering information) to the connector with “DC–IN” mark.

ATTENTION!

ATTENTION!

ATTENTION!

Do not use 36 ÷ 72 V DC power supply for qBRIDGE-101 device which is shipped with external 100÷240V AC to 9V DC power adapter. It can cause permanent device damage.

Connect 36 ÷ 72 V DC power supply to the qBRIDGE-101-DC using special cable shipped with the device. Connect terminal with red wire to positive pole and terminal with black wire to negative pole. Wrong polarity can cause permanent device damage.

You must turn off the power of the device before making any DIP-switch configuration changes. Turn the power on again when configuration is complete.

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qBRIDGE-101. Ethernet to E1 converter/Bridge. User’s manual v.6

To access Dip-switches SW1- SW6 you need to remove the cover of the device’s case. For this purpose twist two screws on the bottom of the case and remove cover. Figure below shows the disposition of DIP-switches on the PCB inside the case.

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qBRIDGE-101. Ethernet to E1 converter/Bridge. User’s manual v.6

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2.2. LAN: Frame buffer configuration

(SW1.4 – SW1.3)

qBRIDGE has internal RAM (Frame Buffer) to store Ethernet frames. The entire Frame Buffer capacity is 340 frames. One part of the Frame Buffer is used to store frames passing from LAN to WAN port and the second part is used to store frames passing from WAN to LAN port. To increase device performance user can configure the way of dividing of the Frame Buffer. Use DIP-switches SW1.3-SW1.4 for this purpose.

SW1.3 SW1.4 LAN-to-WAN buffer capacity WAN-to-LAN buffer capacity

on on 308 packets 32 packets on off off on

170 packets

32 packets

170 packets

308 packets off off reserved reserved

2.3. LAN: Filtering mode (

SW1.2)

qBRIDGE supports Real-time MAC-address filtering with 256 address table and Automatic address learning and aging. If filtering is enabled, only broadcast, multicast and destined for remote LAN frames are forwarded to WAN. The address table can store up to 256 MAC-addresses and is automatically updated. The individual address will be aged and deleted from address table if frames with this address have not been received within 5 minutes. User can enable or disable filtering using DIP-switch SW1.2.

SW1.2

on off

Filtering

enabled (default value) disabled

2.4. LAN: IEEE 802.3x flow control (

SW1.1)

qBRIDGE provides IEEE 802.3x flow control for more effective packet forwarding. If the number of packets buffered in memory exceeds the predefined value, qBRIDGE transmits the PAUSE frame to pause the data flow. When qBRIDGE receives the PAUSE frame it pauses the transmission until the requested time is expired.

User can enable or disable flow control support using DIP-switch SW1.1.

SW1.1

on off

Flow control

enabled disabled (default value)

2.5. WAN (E1): Mode selection

(SW2.8)

WAN interface of qBRIDGE-101 can work both in framed (E1) and unframed (E12) mode. The difference between E1 and E12 stream is (according to G.703.6) that E12 stream transmits bit sequence at speed 2048

Kbit/s and have no structure while Е1 stream has frame structure that is described in ITU-T G.704 specification.

Mode selection of WAN interface is controlled by DIP-switch SW2.8.

SW2.8

on off

WAN interface mode

framed unframed

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qBRIDGE-101. Ethernet to E1 converter/Bridge. User’s manual v.6

2.6. WAN (E1): Time slots selection

(SW2.7 – SW5.1)

When WAN interface is in framed mode user can select time slots that are used for Ethernet frames transmission. Time slot 0 is always used for FAS, NFAS, international bits, CRC4 reminder and so on. Each of

31 alternate timeslots has corresponding DIP-switch and can be used for transmission of Ethernet frames. Whet

DIP-switch is on corresponding timeslot is not used for Ethernet transmission. Whet DIP-switch is off corresponding timeslot is used for Ethernet transmission. If WAN interface is in unframed mode (SW2.8 off) the state of SW2.7 – SW5.1 is ignored and all 2048 Kbit/s bit stream is used for transmission of Ethernet frames.

Dip-switch

SW2.7

Timeslot

1

Dip-switch

SW4.7

Timeslot

17

SW2.6

SW2.5

SW2.4

SW2.3

SW2.2

2

3

4

5

6

SW4.6

SW4.5

SW4.4

SW4.3

SW4.2

18

19

20

21

22

SW2.1

SW3.8

SW3.7

SW3.6

7

8

9

10

SW4.1

SW5.8

SW5.7

SW5.6

23

24

25

26

SW3.5

SW3.4

SW3.3

SW3.2

SW3.1

SW4.8

11

12

13

14

15

16

SW5.5

SW5.4

SW5.3

SW5.2

SW5.1

27

28

29

30

31

2.7. WAN (E1): R

eceive equalizer gain limit

(

SW6.8)

It’s possible to adjust WAN interface receive equalizer gain limit using DIP-switch SW6.8. WAN interface receive equalizer gain can be -12 or -43dB. When receive equalizer gain limit is -43 dB the maximum rich over 24 AWG cable is up to 2 km.

SW6.8

off on

Receive equalizer gain limit

-12 dB

-43 dB(default value)

2.8. WAN (E1): CAS signaling (

SW6.7)

To enable/disable CAS signaling use DIP-switch SW6.7. Timeslot 16 is used to transmit CAS signaling. So when CAS signaling is enabled timeslot 16 can’t be used for Ethernet frames transmission.

SW6.7

on off

CAS signaling

disabled (default value) enabled

2.9. WAN (E1): CRC4 multiframe (

SW6.6)

DIP-switch SW6.6 is used to control CRC4 multiframe.

SW6.6

on off

CRC4 multiframe

disabled (default value) enabled

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qBRIDGE-101. Ethernet to E1 converter/Bridge. User’s manual v.6

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2.10. WAN (E1): Transmit clock source selection

(SW6.5)

qBRIDGE-101 supports two modes of operation. Mode 1: E1 transmit clock is driven by local oscillator.

Mode 2: E1 transmit clock is driven by recovered receive clock. User can select mode of operation using DIPswitch SW6.5. User should choose Mode 2 (default) when connecting qBRIDGE-101 to E1 channels. When using two qBRIDGE-101 to communicate over media transparent in terms of synchronization or over dedicated copper line one of them must be in Mode 1 and another – in Mode 2.

SW6.5

on off

E1 Transmit clock mode

Mode 1 (internal): E1 Transmit clock is driven by local oscillator

Mode 2 (recovered): E1 transmit clock is driven by recovered receive clock

2.11. WAN (E1): Automatic remote alarm indication

(SW6.4 - SW6.3)

Use DIP-switches SW6.4 - SW6.3 to control remote alarm indication.

SW6.4 SW6.3

on off on on on off off off

Remote alarm indication

disabled (default value) transmit RAI transmit AIS transmit AIS

2.12. WAN (E1): Idle code (

SW6.2)

Use DIP-switches SW6.2 to select idle code that is inserted to timeslots that are not used for Ethernet transmission.

SW6.2

on off

Idle code

0x55

0x7E

2.13. WAN (E1): Remote loopback (

SW6.1)

Use DIP-switches SW6.1 to enable or disable remote loopback functionality. When remote loopback is enabled all data received from E1 interface is looped back into the line. This feature is used for testing and troubleshooting and isn’t enabled normally. LED indicators WAN ALM and WAN ERR are ON (yellow) in remote loopback mode.

SW6.1

on off

Remote loopback

disabled (default value) enabled

WAN E1

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qBRIDGE-101. Ethernet to E1 converter/Bridge. User’s manual v.6

Appendix A. Connector pin-outs

QBRIDGE-101. WAN (RJ-45)

Pin

1,2

4,5

3,6

Name

XMT (tip, ring)

RCV (tip, ring)

Chassis

Appendix B. Ordering information

P/N: 36BEU101 (qBRIDGE-101)

P/N: 36BED101 (qBRIDGE-101-DC)

P/N: 36BER101 (qBRIDGE-101-R)

Appendix C. Checking in the box

P/N: 36BEU101 (qBRIDGE-101)

P/N: 36BED101 (qBRIDGE-101-DC)

P/N: 36BER101 (qBRIDGE-101-R)

Power adapter (100÷240V AC to 9V DC)

Cable for DC 36 ÷ 72 power supply connection

Certificate of guarantee

User’s manual

Patch Cord cable “Straight RJ-45” or “Crossover RJ-45”

Description

Transmit Data - out

Receive Data - in

100÷240V AC to 9V DC adapter

DC power supply 36÷72 V

Card for 19" rack 6U

1 (according to the order)

1 (according to the order)

1 (according to the order)

1 (with qBRIDGE-101 only)

1 (with qBRIDGE-101-DC only)

1

1 for two devices

1

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