Sigrand SG-16B Manual de usuario
SIGRAND
SHDSL modem
Sigrand SG-16B
User's Guide
v. 2.5
Novosibirsk
2006
1
© 2005, 2006, Sigrand LLC
All trademarks and registered trademarks mentioned hereina ter are the
property o their respective owners.
Contents
Contents page
How to use this Guide
1. Modem description
1.1 DSL inter ace speci ications
1.1.1 Maximum reach per ormance
1.1.2 File trans er per ormance
1.2 Ethernet inter ace speci ications
1.3 Ethernet Bridge speci ications
1.4 RS-232C inter ace speci ications
1.5 Power supply unit
1.6 Miscellaneous data
1.7 Shipment contents
1.8 Environmental speci ications
1.9 Appearance, controls, indicators and connectors
1.9.1 Front panel and indicators
1.9.2 Rear panel and connectors
2. Modem setup directions
2.1 Connecting modem to a line
2.1.1 Requirements to a communication line
2.2 Choosing modem management method
2.3 ”Master”/”slave” mode
2.4 Setting DSL rate
2.4.1 Setting DSL rate or remote modem
2.4.2 Rate selection guidelines
3. Modem management via console port
3.1 Terminal setup
3.2 General purpose commands
The help command
2
The info command
The stat command
The default command
The reboot command
3.3 DSL inter ace management
The help dsl command
The dsl command
3.3.1 “Master”/”slave” mode selection
The dsl master and dsl slave
commands
3.3.2 Setting DSL rate
3.3.2.1 Setting DSL rate rom “master” modem
The dsl rate command
3.3.2.2 Setting DSL rate manually both sides
3.3.3 Line coding selection
The dsl code command
3.3.4 Link statistics
The dsl stat command
The dsl stat reset command
3.3.5 How to orce a retrain
The dsl retrain command
3.4 Ethernet inter aces management
The eth help commands
The eth command
3.4.1 Rate and duplex type
The eth auto, eth /auto, eth
rate, eth half, eth full commands
3.4.2 Flow control
The eth flow and eth /flow
commands
4. Updating built-in modem irmware
Warranty and scope o liability
Appendix I
Appendix II
3
How to use this Guide
To ease using this Guide the ollowing notational conventions are provided
here (icons as well as relevant onts):
Icons
Icon Meaning Explanation
Pay attention!
The text marked by this icon
contains in ormation making easy
setup and maintenance o
equipment
Important
in ormation!
The text marked by this icon
contains important in ormation
explaining details o operation o
equipment or so tware. This
allows to save your time and
e orts while equipment setup.
Do not make this!
Knowing this in ormation allow
you to avoid actions that can
cause damage to hardware
and/or personal injury.
4
Font usage
Designation Explanation
Picture on the screen
This font shows contents o
terminal screen while modem
setup.
ame of keyboard button
This font shows computer
keyboard buttons, e.g. ”Enter”,
which are used in the console
management mode.
Select Property in the File
menu
Italic notes the ragments o this
Guide containing important
in ormation (together with the
relevant icons). It also marks
so tware buttons o menu in the
text.
dsl stat
Bold font is used to designate
modem management commands
during a terminal session.
Before starting installation of the modem we
recommend you to look for an updated version of this
User's Guide as well as the firmware and the drivers
available at our site www.sigrand. com
5
1. Modem description
The Sigrand SG-16B modem is a SНDSL-modem. It eatures an Ethernet-
bridge and is designed to connect distributed local area networks as well as
remote computers and other devices equipped with an Ethernet inter ace.
The bridge can transmit VLAN IEEE 802.1Q tagged packets through the DSL
inter ace and the Ethernet inter aces.
The SHDSL inter ace o the modem con orms to ITU-T G.991.2.bis standard
and uses ТСРАМ (Trellis-Coded Pulse Amplitude Modulation) line coding.
Features o the ТСРАМ line coding:
The ТСРАМ line coding used by G.991.2 (G.SHDSL) compatible modems has
a ew modes. The modes di er in complexity o coding algorithm. The modes
with larger number o modulation positions (ТСРАМ16, ТСРАМ32) are
applicable or higher rates, the modes with less number o modulation
positions (ТСРАМ4, ТСРАМ8) are applied or lower rates. Respectively, the
more complicated the coding algorithm the worse the channel noise immunity
and vice versa.
So take special attention to the ТСРАМ line coding algorithm selection while
con iguring the line rate. It may be necessary to change the line coding to
achieve the best result.
Table 1 shows the line coding options and respective data rate ranges.
able 1
Line coding Data rate range (kbps)
TCPAM32 256 – 6016
TCPAM16 192 – 3840
TCPAM8 192 – 1216
TCPAM4 64 – 704
Manual line coding selection is available only in the console
management mode – see chapter 3 of this Guide
6
Compatibility:
The Sigrand SG-16B modem line coding is compatible with all Sigrand SG-16
series and Granch SBNI16 series modems.
Limitations of compatibility:
Interoperability with the Granch SBNI16 modems is
supported only within the compatible data rate range from
64 to 4608 kbps.
The modem eatures the ollowing inter aces:
•one SHDSL inter ace (con orms to ITU-T G.991.2.bis standard) providing
the data rate range rom 192 to 5696 kbps and the optional extended
range rom 64 to 6016 kbps
•two Ethernet 10/100Mb (IEEE 802.3) inter aces with Auto-Negotiation and
Auto MDI/MDI-X
•one EIA-232C (RS-232C) inter ace or modem management.
1.1 DSL interface specifications
Link type point-to-point
Number o wires per line 2 (one pair)
Permitted cabling any UTP
Line coding TCPAM
Input/output impedance, Ω135
Data rate range, kbps 64-6016
Data rate step, kbps 64
Transmission type ull duplex
Data trans er mode synchronous, by packets
Packet type HDLC
Checksum type CRC32
Connector type RJ-45
Galvanic decoupling trans ormer
breakdown voltage, min, V
1500
Surge protector triggering voltage
(di erential), V
30
7
Arrester breakdown voltage (common-
mode), V
350
1.1.1 Maximum reach performance
Brie in ormation about the maximum reach per ormance o the Sigrand SG-
16B modem is shown on Table 2. The Bit Error Rate (BER) at the maximum
reach is equal to or less than 10-7. The speci ied reach is proved by testing at
the Sigrand lab re erence line. Full version o the rate table is available at our
site www.sigrand.com. An actual reach may vary against the shown data due
to variations o cable per ormance.
able 2
Data rate
(kbps) Line coding
Rating TPP50-0.4
cable
(26 AWG)
TPP50-0.5
cable
(24 AWG)
6016 ТСРАМ32 Length (km/ t) 1.8/3500 2.2/7200
R (Ω)476 420
4608 ТСРАМ32 Length (km/ t) 2.0/6500 2.6/8500
R (Ω)560 455
3072 TCPAM16 Length (km/ t) 3.0/9800 4.2/13700
R (Ω)840 736
2304 TCPAM16 Length (km/ t) 3.8/12400 5.4/17700
R (Ω)1064 945
1536 TCPAM16 Length (km/ t) 4.4/14400 6.4/20100
R (Ω)1232 1120
1024 TCPAM8 Length (km/ t) 5.0/16400 7.6/24900
R (Ω)1400 1330
512 TCPAM8 Length (km/ t) 5.8/19000 9.0/29500
R (Ω)1624 1575
256 TCPAM8 Length (km/ t) 6.6/21600 10.0/32800
R (Ω)1848 1750
8
128 TCPAM4 Length (km/ t) 7.4/24200 11.4/37400
R (Ω)2072 1995
64 TCPAM4 Length (km/ t) 7.4/24200 11.4/37400
R (Ω)2072 1995
1.1.2 File transfer performance
Per ormance o the SG-16B modem during ile trans erring by FTP protocol is
shown on Table 3. The table contains average readings obtained on a line
with error rate less than 10-7.
able 3
Line data
rate
(kbps)
File trans er
per ormance
(KBps)
Line data
rate
(kbps)
File trans er
per ormance
(KBps)
6016 700 1792 209
5696 662 1536 179
4608 536 1280 149
4096 478 1024 119
3584 418 768 89
3072 354 512 59
2560 304 256 29
2304 261 192 22
2048 234 128 15
1.2 Ethernet interface specifications
Inter ace type 10/100 Base-T
Number o ports 2
Data rate, Mbps 10/100
Duplex type Hal and ull duplex
Compatibility ANSI/IEEE Std 802.3
Auto MDI/MDI-X available
9
1.3 Ethernet Bridge specifications
MAC-address table size 2048
Maximum packet size, bytes 1536
Packet bu er size, KBytes: 512 (340 packets)
1.4 RS-232C interface specifications
Baud rate 9600, 57600
Protocol parameters 8-N-1
Flow control N/A
Connector type RJ-45 (DB-9F with converter)
1.5 Power supply unit
Type BPN-12-1V
Input voltage 220V/50Hz
Output voltage 12V
Maximum load current 1A
Polarity o central contact o connector positive
1.6 Miscellaneous data
Overall modem dimensions:
height, mm/in. 45/1.77
•width, mm/in. 225/8.86
•depth, mm/in. 165/6.5
Weight, g/lb 450/1
Weight with PSU, g/lb 1025/2.26
Power consumption, W 6
1.7 Shipment contents
10
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