Telsey CPVA 500 - SIP Technical Manual
TECHNICAL MANUAL: CPVA 500 - SIP
RESIDENTIAL ACCESS GATEWAY
THE MOST COMPLETE OFFER
MT500--SIEN12
CPVA500 Residential Gateway
Tecnical Manual Code MT500--SIEN12
All rights reserved. No part of this publication may be reproduced
without prior written permission from Telsey
Telsey S.p.A. reserves the right to make changes in specifications and
other information contained in this manual without prior written notice.
In no event shall Telsey be liable for any incidental, special, indirect,
or consequential damages whatsoever, including but not limited to
lost profits, arising out or related to this manual or the information
contained herein, even if Telsey has been advised of, known, or
should have known, the possibility of such damages.
All trademarks are the property of their respective owners.
Telsey telecommunications
Main Index
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Main Index
Main Index ........................................................... i
Tables ................................................................. v
Chapter 1 Introduction ........................................................ 1
CPVA 500 ................................................................................1
Chapter 2 External Interfaces and Connectors ...................... 3
CPVA 500 Led Description ..........................................................3
CPVA 500 Connectors Description ................................................4
Chapter 3 Installation ......................................................... 5
General Advices and Security Rules .............................................5
CPVA 500 Placement .................................................................6
Chapter 4 SIP Protocol ........................................................ 9
Introduction .............................................................................9
Protocol Components ............................................................... 10
SIP Signalling ......................................................................... 11
SIP Methods ........................................................................... 12
Protocol Header Structure ........................................................12
Chapter 5 Web Interface ................................................... 15
Using the web-based user interface ........................................... 15
USB Drivers Installation ........................................................... 16
Factory Default Configuration ................................................... 17
Device Info ............................................................................18
Summary ............................................................................... 18
WAN .....................................................................................18
Statistics LAN ......................................................................... 19
ATM Statistics ......................................................................... 19
ADSL Statistics .......................................................................21
Route ....................................................................................23
ARP .......................................................................................23
Quick Setup ........................................................................... 24
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Advanced Setup ......................................................................28
WAN .....................................................................................28
WAN Setup ............................................................................ 28
ATM PVC Configuration ............................................................28
Connection Type ..................................................................... 29
PPPoA ...................................................................................30
PPPoE ....................................................................................33
MER ......................................................................................33
IPoA ......................................................................................35
NAT Configuration ................................................................... 37
Bridging .................................................................................41
LAN .......................................................................................43
Quality of Service .................................................................... 44
Routing ................................................................................. 46
Default Gateway .....................................................................46
Static Route ...........................................................................47
RIP .......................................................................................48
DSL ......................................................................................49
Voice .....................................................................................52
SIP .......................................................................................52
Diagnostics ............................................................................ 58
Management .......................................................................... 62
Provisioning ........................................................................... 62
Backup Settings ...................................................................... 64
Update Settings ...................................................................... 64
Restore Default ....................................................................... 64
System Log ............................................................................ 64
Access Control ........................................................................ 66
Services ................................................................................67
IP Addresses .......................................................................... 67
Passwords ..............................................................................69
Update Software ..................................................................... 69
Save/Reboot ..........................................................................70
Restore factory default settings .................................................71
Chapter 6 Command Line Interface .................................... 73
Introduction ........................................................................... 73
Control Key Support ................................................................ 74
Adsl ......................................................................................75
Arp .......................................................................................81
Atm ......................................................................................82
Brctl ......................................................................................87
Cat .......................................................................................90
Defaultgateway ...................................................................... 91
Df .........................................................................................92
Dhcpserver ............................................................................ 93
Dltftp ....................................................................................95
Dnsrelay ................................................................................ 96
Echo .....................................................................................98
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Help ......................................................................................99
Ifconfig ................................................................................ 100
Kill ...................................................................................... 103
Lan ..................................................................................... 104
Logout ................................................................................. 107
Passwd ................................................................................ 108
Ping .................................................................................... 109
Ppp ..................................................................................... 110
Ps ....................................................................................... 111
Pwd .................................................................................... 112
Reboot ................................................................................ 113
Recversion ........................................................................... 114
Remoteaccess ...................................................................... 115
Restoredefault ...................................................................... 116
Route .................................................................................. 117
Save ................................................................................... 119
Swversion ............................................................................ 120
Sysinfo ................................................................................ 121
Tftpprov .............................................................................. 122
Traceroute ........................................................................... 123
Voice ................................................................................... 124
WAN ................................................................................... 126
Chapter 7 Technical Features ........................................... 131
Appendix A ...................................................... 133
Dial Plan .............................................................................. 133
Country tones ....................................................................... 135
Appendix B ...................................................... 141
Telephone adapter functionalities ............................................ 141
Glossary .......................................................... 143
Index .............................................................. 153
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Tables
v
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Tables
CPVA 500 - Led Indication ..........................................................3
CPVA 500 - Connection Indication ...............................................4
ATM Layer Statistics over ADSL interface ................................... 20
ATM AAL5 Layer Statistics over ADSL interface ........................... 20
ADSL Statistics field ................................................................ 21
ATM AAL5 Layer Statistics for each VCC over ADSL interface .........21
Network Protocol and Encapsulation Mode .................................. 30
NAT Virtual Servers main page ................................................. 38
NAT Virtual Server fields ..........................................................39
System capacity - PVC/QoS ......................................................45
DSL modulation settings ..........................................................49
DSL Advanced Settings - Test mode choice .................................50
Supplementary services codes .................................................. 55
SS bitmap codes ..................................................................... 55
Diagnostics test description ...................................................... 59
System Log - Configuration options ........................................... 66
Dial Plan Rules ...................................................................... 133
North America Tones ............................................................. 135
Italy tones ........................................................................... 136
UK tones .............................................................................. 137
SWEDEN Tones ..................................................................... 137
FRANCE Tones ...................................................................... 138
NETHERLANDS Tones ............................................................ 138
BELGIUM Tones .................................................................... 139
GERMANY tones .................................................................... 140
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Introduction
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Chapter 1
Introduction
CPVA 500
CPVA500 is the new Telsey Integrated Access Device which sets a reference
for the roll out of broadband ADSL services to the residential market segment.
Its cutting edge technology, combined with the well-known Italian design,
makes CPVA500 the enabler for ADSL broadband operators for the mass
deployment of integrated voice, data and video services.
CPVA500 connects end user equipment such as PCs, Set Top Box and analog
telephones to the ADSL network through:
• 1 Ethernet 10/100BaseT
•1 USB
•2 FXS ports
It integrates voice and signalling gateway capability while providing direct
access to VoIP services and data routing functionalities. These features allow
Service Providers to massively deploy innovative services like Video On
Demand, Video Telephony, Fast Internet Access and VoIP services to
residential users.
Innovative autoinstalling optional solutions, such as the automatic switch of the
end user’s telephones to the VoIP service when the cut over is detected,
completely remove installation costs and enable Service Providers to directly
send CPVA500 to end users.
This product reinforces Telsey as a valuable and experienced partner for
providers aggressively catching the broadband mass market roll out. Our
extensive experience in this industry with about 300.000 gateways installed in
FTTH/ETTH-ADSL networks, combined with our dynamic and aggressive R&D
and a complete gamma of products for the residential and SOHO market are
other important advantages that position Telsey as the ideal partner for new
customers approaching the broadband communication market.
Moreover our CPVA500 is easily customizable according to the network
strategy and topology chosen by any provider. Both the physical interfaces and
the required protocols could be tailored according to specific needs.
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External Interfaces and Connectors
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Chapter 2
External Interfaces
and Connectors
CPVA 500 LED DESCRIPTION
CPVA 500 is equipped with a signaling LED set showing its operation status.
Namely signaling LEDs, listed from left to right, behave as the following table
explains.
Fig. 1 Front View
1234
Tab. 1: CPVA 500 - Led Indication
Ref. Led Denomination Led Colour Indication
1PHONE 1 Green
It indicates activity on Phone 1 line [VoIP]
On = LINE 1 is off-hook
Slow Blinking = LINE 1 is registered on gatekeeper
Fast Blinking = LINE 1 is receiving a telephone call
Off = No registration (line out of service)
2PHONE 2 Green
It indicates activity on Phone 2 line [VoIP]
On = LINE 2 is off-hook
Slow Blinking = LINE 2 is registered on gatekeeper
Fast Blinking = LINE 2 is receiving a telephone call
Off = No registration (line out of service)
3LINK Amber
ADSL Uplink active on the port towards network
On = ADSL Link avaliable (solid ON)
Off = ADSL Link not avaliable (device out of service)
Slow Blinking = Seeking Phase
Fast Blinking = Training Phase
Blinking = Traffic activity
4POWER Red Power On/Off
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CPVA 500 CONNECTORS DESCRIPTION
Fig. 2 CPVA 500 Connectors description
1 2 3 456
Tab. 2: CPVA 500 - Connection Indication
Port
Number
Function Indication Remarks
1ADSL INADSL Uplink Port with RJ11 connector To ADSL WAN Uplink
2ETHERNETETHERNET 10/100 BaseTX with RJ45 connector Connect to user device [PC] through CAT5 cable
3USBUSB B type port - v. 1.1, 12Mbps Connect to user device [PC] through USB cable
4PHONE 1FXS with RJ11 connector
Connect to user analogue telephone through
phone cable
5PHONE 2FXS with RJ11 connector
Connect to user analogue telephone through
phone cable
612 VdcPower Supply Input Use the provided Power Supplier
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Chapter 3
Installation
GENERAL ADVICES AND SECURITY RULES
Install the Access Gateway in a room with a temperature ranging between 5°C
and 45°C, and a relative humidity ranging from 5% to 85%. It is recommended
to avoid abrupt changes of temperature and humidity.
Leave a 10-15 cm of space around the Access Gateway in order to allow correct
aeration. Do not expose to direct sunlight. The device has to always be
connected to the electrical network. In order to avoid fire or electrical shock,
do not install it in a wet or humid environment.
Do not defuse any parts of the Access Gateway. Do not execute operations on
the internal parts for security reason. Do not insert any object into the Access
Gateway. Use only the wall adapter present in the package and the original
spare parts. The socket outlet shall be installed near the equipment and shall
be easily accessible.
Ask for experienced assistance for any type of repair.
Do not cover the Serial Number and Mac Address label. The Serial Number and
the Mac Address will be requested during any call to the Customer Service.
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CPVA 500 PLACEMENT
CPVA500 can be positioned in a place compatibled with cable length and where
the airflow is enough to cool off the equipment.
CPVA500 can be installed either on a flat or on a vertical surface (wall
placement).
In case of table placement, use the provided vertical or horizontal support.
Horizontal Support
Fig. 3 Table Placement - Horizontal Support
Vertical Support
Fig. 4 Table Placement - Vertical Support
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It is possible to place the Access Gateway on the wall by using the appropriate
support (provided) and screw-anchors (not provided, we suggest to use two
Fischer S4 screw anchors).
Wall Support
Fig. 5 Wall Placement: Wall Support
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SIP Protocol
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Chapter 4
SIP Protocol
INTRODUCTION
The Session Initiation Protocol (SIP) is a signalling protocol used for
establishing sessions in an IP network. A session could be a simple two-way
telephone call or it could be a collaborative multi-media conference session.
Since SIP is part of a IETF (Internet Engineering Task Force) specification, it
extends the open-standard spirit of the Internet to messaging, enabling remote
computers, phones, televisions and software to communicate.
Members in a session can communicate via multicast or via a mesh of unicast
relations, or via a combination of these. SIP supports session descriptions that
enable participants to agree on a set of specific media types. SIP is not tied to
any particular conference control protocol. In essence, SIP has to provide or
enable the following functions:
• Name translation and user location: ensuring that the call reaches the
called party wherever it is located. Carrying out any mapping of descriptive
information to location information. Ensuring that details of the nature of
the call are fully supported.
• Feature negotiation: this allows the group involved in a call to agree on
the features supported, recognizing that not all the parties can support the
same level of features.
• Call participant management: during a call, a participant can bring other
users onto the call or cancel connections to other users. Besides, users could
be transferred or placed on hold.
• Call features changes: a user should be able to change the call
characteristics during the course of the call. For example, a call may have
been set up as 'voice-only', but the users may need to enable a video
function.
SIP fulfils these functions and re-uses other web elements to make it flexible
and scalable.
Rather than defining a new type of addressing system, SIP addresses users by
an email-like address. Each user is identified through a hierarchical URL that is
built around elements such as a user's phone number or host name (for
example,
sip:user@telsey.com). This means that it is just as easy to
redirect someone to another phone as it is to redirect someone to a webpage.
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In this sense, SIP borrows from the email model, using the Domain Name
System, to deliver requests to the server that can appropriately cope with
them. This also simplifies the integration of voice and email.
SIP is also transport layer indipendent. Therefore, the underlying transport
could be IP over ATM. SIP uses the User Datagram Protocol (UDP) as well as
the Transmission Control Protocol (TCP), flexibly connecting users independent
of the underlying infrastructure.
SIP provides the necessary protocol mechanisms so that end systems and
proxy servers can provide services:
• User location
• User capabilities
• User avaliability
•Call setup
• Call handling
• Call forwarding
• Callee and calling number delivery
• Personal mobility, i.e. the ability to reach a called party under a
single, location-independent address regardless the change of
terminal by the user
• Terminal type negotiation and selection
• Terminal capability negotiation
• Caller and callee authentication
• Blind and supervised call transfer
• Invitation to multicast conferences.
Protocol Components
There are four basic components within SIP:
1) SIP user agent
2) SIP network server
3) SIP Registration service
4) SIP Event and Presence server
The user agent is the end system component for the call and the SIP server is
the network device that handles the signalling associated with multiple calls.
The user agent itself has a client element, the User Agent Client (UAC) and a
server element, the User Agent Server (UAS). The client element initiates the
calls and the server element answers the calls. This allows peer-to-peer calls
to be made using a client-server protocol.
The main function of the SIP servers is to provide name resolution and user
location, since the caller is unlikely to know the IP address or host name of the
called party, and to pass on messages to other servers using next hop routing
protocols.
SIP servers can operate in three different modes:
• Stateful proxy mode
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• Stateless proxy mode
• Re-direct server
The difference between these modes is that a server in a stateful mode
remembers the incoming requests it receives, along with the responses it sends
back and the outgoing requests it sends on.
A server in a stateless mode forgets all information once it has sent a request.
These stateless servers are likely to be the backbone of the SIP infrastructure
while stateful-mode servers are likely to be the local devices close to the user
agents, controlling domains of users.
A re-direct server receives the request, but instead of passing it onto the next
server, it sends a response to the caller party, indicating the address for the
called user. This method enables the provisioning of the address for the caller,
in order make it possible to contact the called party directly at the next server.
The SIP Registration Service provides a means for a particular device to
register to use a SIP address. As seen at the beginning of this chapter, SIP
addresses use ‘URLs’ based on the same addressing scheme used in the web
and similar in form to an email address. The SIP address provides a single
address of record for the user that delivers a one number service for all
communications applications. Users can dynamically register the devices
through which they may be contacted for all types of applications. As a result,
people will no longer have to hand out multiple contact addresses as the system
will automatically handle the distribution of all types of calls appropriately
through the proxy and redirect servers.
SIP Event and Presence Servers allow the effective sharing of information about
and between users and/or applications.
SIP Signalling
Here is reproduced a simple procedure of a call set-up:
a) The caller (User Agent Caller) sends a request with the SIP URL
of the called party.
b) If the client knows the location of the other party, is sends the
request directly to its IP address. If the location is unknown, the
client can send it to a SIP network server, which has been
locally configured.
c) The server will try to resolve the called user's location and
sends the request to them. There are many ways it can do this:
searching the DNS or accessing databases. Alternatively, the
server may be a redirect server that may return the called user
location to the calling client for it to try directly. During the
course of locating a user, one SIP network server can proxy or
redirect the call to additional servers until it arrives at one that
definitely knows the IP address where the called user can be
found.
d) Once found, the request is sent to the user. In the simplest
case, the user's telephony client receives the request, that is,
the user's phone rings. If the user takes the call, the client
responds to the invitation with the designated capabilities of
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the client software and a connection is established. If the user
declines the call, the session can be redirected to a voice mail
server or to another user.
SIP has two additional significant features.
1) A stateful SIP server's ability to split an incoming call so that several
extensions can be rung at once. The first extension to answer takes the
call.
2) SIP's unique ability to return different media types within a single
session.
SIP Methods
The commands that SIP uses are called methods. SIP defines the following
methods:
Protocol Header Structure
The protocol is composed of:
a) A start line
b) A message header
c) An empty line
d) An optional message body.
R
EQUEST MESSAGES
The format of the Request Packet header is shown in the following figure:
SIP Method Description
INVITE Invites a user to a call
ACK Used to facilitate reliable message exchange for
INVITEs
BYE Terminates a connection between users or declines a
call
CANCEL Terminates a request, or search, for a user
OPTIONS Solicits information about a server’s capabilities
REGISTER Registers a user’s current location
INFO Used for mid-session signalling
M
ETHOD
R
EQUEST
URI SIP V
ERSION
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Method - It is the method to be performed on the resource. All the possible
methods are listed in the previous table
Request URI - A SIP URL or a general Uniform Resource Identifier. It
represents the user or service to which this request is being addressed.
SIP Version - The SIP version being used.
R
ESPONSE MESSAGE
The format of the Response Message header is shown in the following figure:
SIP Version - The SIP version being used.
Status Code - A 3-digit integer code of the attempt to understand and satisfy
the request.
Reason Phrase - A textual description of the status code.
SIP V
ERSION
S
TATUS CODE
R
EASON PHRASE
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Web Interface
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Chapter 5
Web Interface
USING THE WEB-BASED USER INTERFACE
To configure the CPVA500 for the first time, the configuration PC must have a
static IP address within the 192.168.1.x subnet.
Perform the following steps to bring up the Web User Interface:
1) Connect an Ethernet cable between the CPVA500 and a PC configured to
use subnet 192.168.1.x.
2) To configure the PC to use subnet 192.168.1.x, right click on the Local
Area Connection under the Network and Dial-Up connection window
and select Properties.
3) Select Internet Protocol (TCP/IP) and then click on the Properties
button.
4) Select the Use the following IP address option and then enter the IP
address as 192.168.1.x
1
, where x is some number between 2 and 254.
Click the tab button to select the subnet mask as 255.255.255.0.
5) If the CPVA500 has not been turned on, turn on the power. Wait about
one minute.
6) In a Web browser on the PC, connect to http://192.168.1.1/ to enter
the router's configuration program. The browser should connect and you
should see the Enter Network Password screen shown in the following
figure. If the browser does not connect, the router may not have an
image. In this case, follow the instructions on page 69 to update the
CPVA500 image.
7) Type admin in the User Name and Password fields, and click OK. These
values can be changed later in the Web User Interface.
1. Note that Ethernet and USB interface share the same subnet, since they are bridged within
the router.
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USB Drivers Installation
In order to use USB port, it is necessary to install Microsoft Windows Remote
NDIS USB drivers.
Follow these steps to complete the installation:
1) On Windows 98, Windows Me, Windows 2000 or Windows XP PC, enter
"
mkdir \temp\usb" to create a temporary directory.
2) Enter "cd \temp\usb" to change to the temporary directory.
3) Copy the tlsID_cpva500_winusbrndis.zip file to the Windows PC.
4) Unzip tlsID_cpva500_winusbrndis.zip into the temporary directory.
5) Connect a USB cable between the PC and the CPVA500.
6) The first time that this is done, the Windows PC displays the "New
Hardware Found" dialog. When prompted for the location of the driver,
specify the temporary directory, \temp\usb.
7) On Windows 98 and Windows Me, you will need to reboot the Windows
PC.
8) The CPVA500 Windows USB driver looks like a network adapter card to
Windows. It is bound to TCP/IP. Configure TCP/IP appropriately for your
environment.
The driver is now operational.
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Factory Default Configuration
During Power on initialization, the CPVA500 initializes all configuration
attributes to default values. It will read in the configuration profile from the
permanent storage section on the flash memory. The default values are
overridden when identical attributes with different values are configured.
The configuration profile in the permanent storage can be created via Web User
Interface or Telnet User Interface, or the other management protocols.
The factory default configuration can be restored in the following method:
•Via Web page, by clicking the Restore Default Settings option in
the Restore Default screen;
•Via Telnet with
restoredefault command.
•Via Phone, when the unit becomes unreachable. Refer to page 71
for futher information.
The default parameters of the device are the following:
• LAN port IP address: 192.168.1.1
•LAN port Netmask: 255.255.255.0
•Local Administrator
1
account name: admin
• Local Administrator account password: admin
• Local Non-Administrator
2
account name: user
• Local Non-Administrator account password: user
• Remote WAN access
3
: enabled all service
• Remote WAN access account name: support
• Remote WAN access account password: support
• DHCP server on LAN interface: disabled
Note
The parameters not included in the previous list are not set.
1. The Local Access screen allows you to set and confirm “admin” unrestricted access to change
the configuration of the router, but cannot obtain access from WAN. Both username and
password have a maximum length of 15 characters.
2. The User Access screen allows you to set and confirm “user” access to view the configuration, statistics, and to update the router software via LAN, but not via WAN. Both username
and password have a maximum length of 15 characters.
3. The Remote technical support account allows the local administrative user to explicitly enable a remote technician to access Telsey Router user interface and allows it to send ping
response packet. This account allows you to set and confirm “support” access for router
maintenance and diagnostics. The remote support access will not work in bridge mode since
there is no public IP address assigned to the router. Both username and password have a
maximum length of 15 characters.
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DEVICE INFO
Summary
After login, the Device Info screen appears as shown in the following figure.
WAN
The following page shows the settings currently configured in the WAN setup
(Advanced Setup section).
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Statistics LAN
The LAN Statistics screen shows interface statistics for Ethernet and USB
interfaces.
ATM Statistics
The following figure shows the ATM statistics screen.
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Tab. 3: ATM Layer Statistics over ADSL interface
Field Description
InOctets Number of received octets over the interface
OutOctects Number of transmitted octets over the interface
InErrors Number of cells dropped due to uncorrectable HEC
errors
InUnknown Number of received cells discarded during cell header
validation, including cells with unrecognized VPI/VCI
values, and cells with invalid cell header patterns. If
cells with undefined PTI values are discarded, they are
also counted here.
InHecErrors Number of cells received with an ATM Cell header HEC
error.
InInvalidVpiVciErrors Number of cells received with an unregistered VCC
address.
InPortNotEnabledErrors Number of cells received on a port that has not been
enabled.
InPtiErrors Number of cells received with an ATM header Payload
Type Indicator (PTI) error.
InIdleCells Number of idle cells received.
InCircuitTypeErrors Number of cells received with an illegal circuit type.
InOamRmCrcErrors Number of OAM and RM cells received with CRC errors.
InGfcErrors Number of cells received with a non-zero GFC.
Tab. 4: ATM AAL5 Layer Statistics over ADSL interface
Field Description
InOctets Number of received AAL5/AAL0 CPCS PDU octets.
OutOctets Number of AAL5/AAL0 CPCS PDU octets transmitted.
InUcastPkts Number of received AAL5/AAL0 CPCS PDUs passed to
a higher-layer.
OutUcastPkts Number of AAL5/AAL0 CPCS PDUs received from a
higher-layer for transmission.
InErrors Number of AAL5/AAL0 CPCS PDUs received that
contain an error. The types of errors counted include
CRC-32 errors, SAR timeout errors and oversized SDU
errors.
OutErrors Number of AAL5/AAL0 CPCS PDUs that could not be
transmitted due to errors.
InDiscards Number of AAL5/AAL0 CPCS PDUs discarded due to an
input buffer overflow condition.
OutDiscards This field is not currently used.
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ADSL Statistics
The following figure shows the ADSL statistics screen.
Tab. 5: ATM AAL5 Layer Statistics for each VCC over ADSL interface
Field Description
CrcErrors Number of PDUs received with CRC-32 errors.
SarTimeOut Number of partially re-assembled PDUs which were
discarded because they were not fully re-assembled
within the required time period. If the re-assembly
timer is not supported, then this object contains a zero
value.
OverSizedSDUs Number of PDUs discarded because the corresponding
SDU was too large.
ShortPacketError Number of PDUs discarded because the PDU length
was less than the size of the AAL5 trailer.
LengthErrors Number of PDUs discarded because the PDU length did
not match the length in the AAL5 trailer.
Tab. 6: ADSL Statistics field
Field Description
Mode Modulation protocol G.DMT or T1.413
Type Channel type, Interleave or Fast
Line Coding Trellis coding on/off
Status Link Status
SNR Margin (dB) Signal to Noise Ratio (SNR) margin
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With the ADSL Statistics
window, a Bit Error Rate
Test can be started using
the ADSL BER Test
button. The windows
associated with this test
include a start/
configuration window,
and in-process window
and a results window.
Select the Tested Time
(in seconds) and press
Start.
Attenuation (dB) estimate of average loop attenuation in the
downstream direction
Output Power (dBm) total upstream output power
Attainable rate (Kbps) maximum achievable downstream rate
K number of data bytes in ADSL data frame (DMT
symbol)
S length of Reed-Solomon code word in data frames
R number of redundant check bytes per Reed-Solomon
code word
D interleaver depth
Super Frames total number of super frames
Super Frames Errors number of super frames received with errors
RS Words total number of Reed-Solomon code words
RS Correctable Errors number of RS words with correctable errors
RS uncorrectable Errors number of RS words with uncorrectable errors
HEC Errors total number of Header Error Checksum errors
LCD Errors total number of Loss of Cell Delineation
Tab. 6: ADSL Statistics field
Field Description
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