Nokia M1122 User Manual
Nokia M1122
ADSL Routerā
T66280
ADMINISTRATOR MANUAL
M1122
ADSL Router
Administrator Manual
C33906.20 A0
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E Copyright Nokia Networks Oy
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E COPYRIGHT Nokia Networks Oy 2000
All rights reserved.
No part of this publication may be copied, distributed, transmitted, transcribed, stored in a retrieval
system, or translated into any human or computer language without the prior written permission
of Nokia Networks Oy.
The manufacturer has made every effort to ensure that the instructions contained in the
documents are adequate and free of errors and omissions. The manufacturer will, if necessary ,
explain issues which may not be covered by the documents. The manufacturer’s liability for any
errors in the documents is limited to the correction of errors and the aforementioned advisory
services.
The documents have been prepared to be used by professional and properly trained personnel,
and the customer assumes full responsibility when using them.The manufacturer welcomes
customer comments as part of the process of continual development and improvement of the
documentation in the best way possible from the user’s viewpoint. Please submit your comments
to the nearest Nokia sales representative.
NOKIA is a registered trademark of Nokia Corporation.
Any other trademarks mentioned in the documents are the property of their respective owners.
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Document History
Document Date Comment
C33906001SE_00 13.09.2000
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Contents
Chapter 1
Introduction to Nokia M1122 1-1. . . . . . . . . . . . . . . . . .
Chapter 2
Applications and features 2-1. . . . . . . . . . . . . . . . . . . . .
2.1 Applications 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Internet access 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote work 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LAN interconnection 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Features 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.1 Interfaces 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LAN interfaces 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Internal host/gateway interface 2-7. . . . . . . . . . . . . . . . . . . .
Data VCC operation 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.2 Routing 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.3 Bridging 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.4 Network Address Port Translation 2-8. . . . . . . . . . . . . . . . . . .
2.2.5 Dynamic Host Configuration Protocol 2-9. . . . . . . . . . . . . . . .
2.2.6 ATM and ADSL 2-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.7 Point-to-Point T unneling Protocol (PPTP) 2-10. . . . . . . . . . . . .
2.2.8 Point-to-Point Protocol over Ethernet (PPPoE) 2-11. . . . . . . . . .
2.2.9 Payload encapsulations 2-11. . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.10 Weighted Fair Queueing (Class of Service) 2-11. . . . . . . . . . . .
2.2.11 Management 2-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.12 Dedicated management channel 2-12. . . . . . . . . . . . . . . . . . . . .
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Chapter 3
Interfaces and indicator lights 3-1. . . . . . . . . . . . . . . . .
3.1 Interfaces 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1.1 Ethernet interface 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1.2 ADSL interface 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Command line interface 3-3. . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Indicator lights 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 4
Installing Nokia M1122 4-1. . . . . . . . . . . . . . . . . . . . . . .
4.1 M1 122 default settings 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 Step-by-step installation procedure 4-3. . . . . . . . . . . . . . . . .
Chapter 5
Managing M1122 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1 Operational examples 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.1 Routing/tunneling IP only 5-2. . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.2 Routing/tunneling IP, bridging other protocols 5-2. . . . . . . . . .
5.1.3 Routing/tunneling IP, bridging all protocols including IP 5-3. .
5.1.4 Bridging only 5-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2 T ypical configuration tasks 5-4. . . . . . . . . . . . . . . . . . . . . . . .
5.2.1 Configuring DHCP and DNS 5-4. . . . . . . . . . . . . . . . . . . . . . .
5.2.2 Configuring static and dynamic routing 5-5. . . . . . . . . . . . . . .
5.2.3 File system and downloading new firmware using TFTP 5-6. .
Downloading configuration or application from monitor 5-7
5.3 Browser management 5-8. . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.1 Opening a connection 5-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.2 Main Page 5-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.3 Service Providers pages 5-11. . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.4 Local Network pages 5-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Local ports 5-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DHCP 5-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NAPT 5-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Routing page 5-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.5 Statistics page 5-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.6 Restart page 5-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.7 Save Config page 5-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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5.4 Command line interface (CLI) 5-20. . . . . . . . . . . . . . . . . . . . .
5.4.1 Main mode commands 5-23. . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.4.2 Configuration mode commands 5-44. . . . . . . . . . . . . . . . . . . . . .
Root level commands 5-45. . . . . . . . . . . . . . . . . . . . . . . . . . .
System level commands 5-46. . . . . . . . . . . . . . . . . . . . . . . . .
Password level command 5-47. . . . . . . . . . . . . . . . . . . . . . . .
Ethernet level commands 5-48. . . . . . . . . . . . . . . . . . . . . . . .
VCC (ATM channel) commands 5-50. . . . . . . . . . . . . . . . . . .
Vbridge commands 5-55. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dedicated management channel commands 5-56. . . . . . . . . .
Common commands 5-57. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix A
Technical specifications A-1. . . . . . . . . . . . . . . . . . . . . . .
A.1 Mechanical construction and power supply A-3. . . . . . . . . .
A.2 Ambient conditions, EMC and safety A-3. . . . . . . . . . . . . . .
Ambient conditions A-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EMC A-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety A-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Glossary
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Chapter 1
Introduction to Nokia M1122
Nokia M1122 is an integrated ADSL (Asymmetric Digital Subscriber
Line) bridge and router which enables high-speed Internet access for
your Ethernet local area network (LAN). It multiplies the capacity of
the already installed telephone lines used traditionally for telephone
and dial-up modem services. M1122 brings high-speed connections
available for home users, small offices and telecommuters.
Figure 1-1 Nokia M1122
M1122 allows you to connect your desktop and laptop PCs to remote
networks. Your PCs must be equipped with a 10Base-T Ethernet
interface. M1122 has an in-built 4-port hub, which allows easy home
network installation.
The ADSL high-speed Internet access may be delivered to you over
the same copper pair of wires that is used for your traditional telephony
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services. As both services utilise the same pair of wires, a filter is
needed to separate them. This is called a POTS filter and it is a small
external device connected between your telephone and the telephone
wall socket.
Your Nokia M1122 interconnects with a Digital Subscriber Line
Access Multiplexer (DSLAM) installed and maintained by your
access provider in their central office. M1122 ADSL technology is
based on Discrete Multitone (DMT) modulation allowing a maximum
of 8 Mbit/s data transmission from the network and 800 kbit/s towards
the network. However, these figures illustrate the maximum
performance of the technology and are subjected to the physical line
conditions and the distance from you to the central office. M1122 is
capable of adapting to the physical line conditions and guarantees the
maximum transmission rate possible on the particular line. M1122
adapts its speed to the line conditions in steps of 32 kbit/s. In addition
to these physical limitations affecting your data throughput, your
Internet Service Provider (ISP) may limit your access according to
their service provisioning policy and based on your service contract.
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Chapter 2
Applications and features
In this chapter, we present the most common applications and features
of M1122. The use and configuration of your Nokia M1122 may be
different from the configurations presented in this manual, even for
similar applications. The configurations presented in this manual
represent a typical way of using M1122 for the corresponding
applications.
2.1 Applications
The three typical applications discussed below are the Internet access,
remote work, and office LAN interconnection.
Internet access
Your access to the Internet is provided by your Internet Service
Provider (ISP). Nokia M1122 connects you through your telephone
line and the ATM (Asynchronous Transfer Mode) network to the
network of your ISP, which, in turn, is connected to the Internet.
Hence, all your data goes through the ISP’s network. If you are using
only one ISP for your Internet access, your ISP may give you a limited
set of IP addresses belonging to its address space that you may utilise
in your desktop and laptop computers on your home network.
However, in many cases it is more practical to separate your own
private LAN from the ISP’s public network by using private IP
addresses. This way you are not limited to the number of public IP
addresses provided by your ISP but you can manage your own address
space independently. For this you will need to use NAPT (Network
Address Port Translation) feature available in your M1122 modem.
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This mode of operation reduces the need to have more than one public
Internet address. Furthermore, it prevents others from seeing and
accessing your private network and therefore it acts as a simple
firewall.
Customer
premises
LAN
DSLAM
10Base-T
ATM
network
RAN
Internet
10Base-T
Internet connection
2-2
Figure 2-1 High-speed Internet access
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Remote work
Another application for M1122 is remote work. In this case the
end-to-end architecture can, for example, use PPP over Ethernet,
where a dial-up-type PPP connection is created between your home PC
and your corporate networks PPP access server based on the user name
and password you issue in your PC. The same set up could be used for
accessing the public Internet with a different user name and password.
This example naturally presumes that your ISP supports this type of
approach for providing remote work services for our company.
Remote
worker 1
DSLAM
ATM
network
10Base-T
Nokia M1122
Remote
worker 2
Remote
worker 3
PPPoE
RAN L2TP
Company
router
Corporate
network
Figure 2-2 Remote work using M1122 as a standard router
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LAN interconnection
M1122 can also be used for corporate branch office LAN
interconnection. As a bridge, M1 122 enables all network protocols to
be used on the corporate network.
LAN
Remote
office 1
Remote
office 2
Remote
office 3
10Base-T
10Base-T
DSLAM
ATM
network
Company
bridge
Corporate
network
Figure 2-3 LAN interconnection
2.2 Features
M1122 can operate as a bridge and/or Internet Protocol (IP) router
between the Ethernet and the virtual channels of ADSL/ATM
interfaces supporting both dynamic and static routing.
2.2.1 Interfaces
M1122 has the following interfaces:
D Four Ethernet interfaces (LAN)
D 8 ATM VCC interfaces
D ATM VCC management interface
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D Gateway/bridge management interface. This interface is used as a
bridge host interface or gateway interface depending on the
operation mode. In this manual it is called VBRIDGE. On the
M1122 web pages, the interface is called gateway or bridge IP
interface.
M1122 can operate in four different main modes:
D Bridging only
D Routing/tunneling IP only
D Routing/tunneling IP, bridging all but IP
D Routing/tunneling IP and bridging all, including IP
The mode in which M1122 operates depends on the configuration of
the unit’s interfaces. Table 2-1 shows the operational modes and the
corresponding interface configurations.
LAN interface ATM VCC interfaces Vbridge
(gateway/host interface)
Bridge only
Bridging Bridging. Used as a manage-
ment (host) interface
for all bridged interfaces in case such is
needed.
Route/tunnel IP only
Routing (IP address
configured)
Routing (IP address
configured) or PPTP
local tunneling activated for each active
ATM VCC.
Not used in this case.
The unit can be managed through any of
the LAN, or ATM interface IP addresses.
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LAN interface Vbridge
Route/tunnel IP, bridge all other traffic
Routing (IP address
configured) and bridging activated.
Route/tunnel IP, bridge all other including IP
ATM VCC interfaces
VCCs that only route
or tunnel have routing
(IP address configured) or PPTP local
tunneling activated.
VCCs that both bridge
and route have additionally bridging activated. This requires
ETH-LLC encapsulation to be used on
those VCCs.
VCCs that only bridge
have only bridging
activated.
(gateway/host interface)
Typically not used in
this case. The unit
can be managed locally through LAN interface and remotely
through a separate
management VCC or
the ATM VCCs which
have routing activated.
Bridging activated VCCs that only route
or tunnel have routing
(IP address configured) or PPTP local
tunneling activated.
VCCs that only bridge
have only bridging
activated.
Used as an IP gateway interface for LAN
interface.
Table 2-1 Operational modes
LAN interfaces
LAN interfaces can be configured individually to bridge and route
packets. There are three different operational modes in LAN
interfaces:
D Bridging only; only bridging is activated in the interface. In this
case the interface bridges all protocols.
D Routing only; only IP address is configured in the interface. In this
case, the interface routes IP packets.
D Bridging and routing; Bridging is activated in the interface and IP
address is configured in the interface. In this case, the interface
routes IP packets and bridges all other packets.
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Internal host/gateway interface
There is a special host/gateway logical IP interface within M1122
called VBRIDGE. This interface has a specific purpose in M1122. In
applications where some ATM virtual channel connections are used
for bridging IP traffic and some other ATM virtual channel
connections are used for routing IP traffic, the VBRIDGE interface
must be used instead of LAN IP address. Alternatively , this interface is
used in bridge only application when the IP address is required for
remote management purposes.
Data VCC operation
M1122 supports the following encapsulations in each ATM data
virtual channel individually:
D RFC2684 LLC encapsulation for bridged IP (ETH-LLC)
D RFC2684 LLC encapsulation for routed IP (IP-LLC)
D RFC2364 Virtual circuit multiplexed PPP over AAL5 (PPP-VC)
D RFC2364 Virtual circuit multiplexed PPP over AAL5 used to
tunnel LAN/VBRIDGE PPTP packets (TUNNELED-PPP-VC)
If an IP address is given to a virtual channel interface and bridging is
enabled at that interface, then IP data at that interface is routed and all
other protocols are bridged. The only encapsulation which allows both
bridging and routing simultaneously is ETH-LLC. For example, it is
possible to route ETH-LLC encapsulated packets and at the same time
bridge, for example, PPPoE packets (PPPoE packets are transported
directly over Ethernet frame, not within IP packets).
2.2.2 Routing
Routing is based on routing entries in a routing table. Static routes are
added via the management interface and dynamic routing is done using
RIP and RIPv2. Routing is done between the Ethernet 10Base-T
interface and the virtual channel connection (VCC) of the A TM/ADSL
interface. M1122 supports up to 8 simultaneous VCCs.
M1122 supports IGMP (Internet Group Management Protocol) proxy
receive function for IP multicast applications.
2.2.3 Bridging
Bridging is supported to provide full protocol transparency. Bridging
can be used simultaneously with IP routing. M1122 works as a
self-learning bridge supporting up to 1024 MAC addresses. Bridging
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is done between the Ethernet 10Base-T interface and each ATM VCC
interface. Optionally , the bridging between the VCCs can be disabled.
2.2.4 Network Address Port Translation
M1122 supports Network Address Port Translation (NAPT) for
TCP/IP , UDP/IP and ICMP/IP protocols. When NAPT is used, a single
IP address is allocated to a VCC which leads to the public IP network.
The Ethernet subnet has private IP addressing and is not visible to the
VCC. NAPT translates the IP source address and source port number
dynamically to the VCC IP address and port number. Similarly,
packets coming from the VCC are mapped back to the original
destination addresses. NAPT allows up to hundreds of hosts to share a
single VCC IP address to the public network. The principle of Network
Address Port Translation is presented in Figure 2-4.
Home network (LAN) Internet (WAN)
src:192.168.1.112:1228
dst:194.112.11.111:80
src:194.112.11.111:80
dst:192.168.1.112:1228
NAPT router
192.168.1.254
src:195.112.12.161:50001
dst:194.112.11.111:80
src:194.112.11.111:80
dst:195.112.12.161:50001
195.112.12.161
Figure 2-4 Principle of Network Address Port Translation
NAPT may restrict the operation of some IP applications. NAPT also
operates as a simple IP firewall because translation is only allowed
when the first packet is transmitted from the LAN. This means that the
NAPT table entry is created only when a packet is sent from the home
network to the Internet. With server support capability, the user can
add static entries to the NAPT table allowing the translation always in
both directions. This capability is used to add servers (HTTP, NNTP,
and FTP), which are visible to the public IP network via the VCC, on
the LAN subnet.
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NAPT supports most IP-based protocols. Because NAPT operates on
the IP and transport layer , the application that includes IP address and
port within the payload will not work properly through NAPT . In many
cases, these applications can be passed through the NAPT using
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Application Layer Gateway functionality (ALG). M1122 has ALG for
the following protocols/applications:
D ICMP
D FTP
D H.323 including NetMeeting
D CUSeeMe
D PPTP
D IRC
D IPSEC ESP tunnel mode and IKE
Note, that most IPSEC implementations will fail when passed through
NAPT. A typical reason is that the identification may fail if the
identification is based on IP address. Also, only tunnel mode without
Authentication Header (AH) works.
2.2.5 Dynamic Host Configuration Protocol
M1122 can act as a Dynamic Host Configuration Protocol (DHCP)
server for the PCs on the end-user home network. In this mode, M1122
can assign up to 253+253 consecutive addresses from two separate
address ranges (that is, 253 consecutive addresses per address range)
to the PCs on the home network. Two separate address ranges can be
used if more than 253 addresses are required on the local subnet, if two
non-contiguous address ranges are needed or if an additional router
with DHCP relay is used on the local network. M1122 can also act as a
DHCP relay agent and relay the DHCP requests to an external DHCP
server.
2.2.6 ATM and ADSL
M1122 supports up to 8 simultaneous VCCs and supports UBR
(Unspecified bit rate) traffic shaping on all VCCs. The maximum
transmit rate on each VCC is the ADSL upstream capacity. If more
than one VCC is transmitting simultaneously, the ADSL upstream
capacity is temporarily shared between these VCCs. When one VCC is
idle, the bandwidth is used by another VCC.
The ADSL transmission is based on the DMT line code. M1122
provides a DMT line rate up to 8 Mbit/s downstream and up to 800
kbit/s upstream. The DMT transceiver is rate adaptive and capable of
providing faster rates over short distances or slower rates over long
distances. The transceiver adapts itself to the line conditions. M1122
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supports also ADSL Lite. In the ADSL Lite mode, the maximum line
rates are 1536 kbit/s downstream and 512 kbit/s upstream.
M1122 supports both G.992.1 and G.992.2 ADSL recommendations
defined by ITU-T .
Rate adaptation is done in steps of 32 kbit/s. The ADSL interface of
M1122 functions completely automatically and all configuration
related to the ADSL connection is done at the access multiplexer in the
operator’s premises. The network operator can set the data rates as a
part of the network management functionality provided by Nokia
DSLAM.
2.2.7 Point-to-Point Tunneling Protocol (PPTP)
When PPTP local tunneling is used, a local network client initialises a
PPTP-tunneled PPP connection (VPN) to Nokia M1 122. The modem
terminates the tunnel and all data from that terminated local PPTP
tunnel will be forwarded to an assigned ATM VCC by using PPP over
AAL5 encapsulation. Thus, each local PPTP tunnel requires an
equivalent ATM VCC assigned to it restricting the total number of
local PPTP hosts to 8.
Local tunneling is used when there is a need to have one or more
computers connected independently to different networks. For
example, in remote work application, the rest of the family may be
using the common ISP services and one or two family members need to
gain access to their corporate networks. With local tunneling, these
remote workers may be connected to a different network than the rest
of the users.
Local tunneling is activated using the PPTP client running, for
example, in Windows. The destination IP address must be M1122
LAN/VBRIDGE IP address depending on the configuration. PPP
packets within PPTP are mapped to the configured VCC. M1122 has
three different ways to choose the ATM VCC that will be used for
tunneling:
D Automatic, chooses the first free VCC
D Chooses the VCC number using C:number, where number is from
1 to 8. C:number is typed after the M1122 IP address in PC’s PPTP
client Connect To window (see Figure 2-5).
D Chooses the VCC number using N:name, where name is the
VCCx description. N:name is fed after the M1122 IP address.
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Figure 2-5 Choosing the VCC2 for tunneling example
2.2.8 Point-to-Point Pr otocol over Ethernet (PPPoE)
Standard PPPoE mode is used when M1122 is operating as a bridge.
PPPoE protocol defines how PPP sessions are mapped into Ethernet
packets. When M1122 operates as a bridge, this protocol is transparent
to M1122.
2.2.9 Payload encapsulations
Both routed and bridged protocols are encapsulated in the A TM link by
using either RFC 2684 LLC/SNAP encapsulation or VC multiplexing.
M1122 also supports PPP over AAL5 encapsulation, in which routed
protocols are first encapsulated in PPP (RFC 1661). PPP is then
encapsulated in ATM according to the IETF PPP over AAL5 using
RFC 2364 VC multiplexing or LLC/NLPID encapsulation.
2.2.10 W eighted Fair Queueing (Class of Service)
As a Class of Service (CoS) function, M1122 supports Weighted Fair
Queueing (WFQ) for each ATM VCC. The CoS function ensures that
different IP traffic flows are treated fairly in the upstream (towards the
Internet) direction. This may be necessary , in some cases, because the
upstream capacity of the ADSL line is somewhat limited compared to
the Ethernet bandwidth on the office or home LAN. The WFQ CoS
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function classifies IP traffic flows based on IP address, protocol and
port fields. It is capable of identifying the IP flow from all supported
payload encapsulation formats. WFQ works properly only with
IP-based protocols. If the flow is IP-based but is encrypted using IPSec
or PPP encryption, then WFQ cannot identify the flows correctly. In
this case, the default flow is used and the default flow is treated as a
single flow.
2.2.11 Management
There are three management methods in M1122:
D Command line interface (CLI) through console serial port
D CLI via telnet
D Web browser management
The CLI allows complete configuration of the unit; the Web browser
management allows the configuration of the most frequently used
configuration parameters.
2.2.12 Dedicated management channel
The operator or the Internet Service Provider can establish a dedicated
management channel to M1122. This channel provides access to the
M1122 management (with telnet or web browser) and it can be used to
upload a new software to M1122.
The dedicated management channel is separated from the other IP
stack. It is not possible to access the other interfaces or networks
behind the data interfaces through the dedicated management channel.
Similarly , access from LAN or data VCCs to the management channel
is blocked. The management channel supports only routing using the
following encapsulations:
D RFC2684 LLC encapsulation for bridged IP (ETH-LLC)
D RFC2684 LLC encapsulation for routed IP (IP-LLC)
D RFC2364 Virtual circuit multiplexed PPP over AAL5 (PPP-VC)
2-12
In Figure, 2-6 VCC1 is used for customers data transmission.
Administration through this channel has been disabled. The operator
or the service provider uses the management VCC for management
purposes only.
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LAN
10Base-T
Home
network
Nokia M1122
ISP’s NMS Network management system
VCC1/Data
(admin disabled)
Management VCC
Figure 2-6 Dedicated management channel
Internet
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Chapter 3
Interfaces and indicator lights
This chapter describes the external interfaces of M1122 and introduces
its front panel indicator lights.
3.1 Interfaces
M1122 has one ADSL line interface and four LAN interfaces
(10Base-T Ethernet). It also has a local management interface (CLI)
for management purposes. The ADSL line interface is compatible with
ITU-T G.992.1 specification.
Power switch
Mains connector
Command line interface (CLI)
Figure 3-1 M1122 back panel
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Ethernet ports
(ETH-1, ETH-2,
ETH-3, ETH-4)
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ADSL line (DSL)
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3.1.1 Ethernet interface
The Ethernet interfaces (ETH) are located on the back panel. The
Ethernet interface is a standard 10 Mbit/s half-duplex 10Base-T
interface. The mechanical connector is an 8-pin RJ-45. The pin-out
numbering is shown in Table 3-1.
18
Figure 3-2 ETH connector
PIN Signal Direction
1 Rx+ <– Receive data +
2 Rx– <– Receive data –
3 Tx+ –> Transmit data +
6 Tx– –> Transmit data –
Table 3-1 Ethernet interface pin-out numbering
3.1.2 ADSL interface
The ADSL interface (DSL) is compatible with ITU-T G.992.1
specification. The mechanical connector is a 6-pin RJ-11. The pin-out
numbering is shown in Table 3-2.
16
MDI signal
M1122-
Ethernet
3-2
Figure 3-3 DSL connector
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PIN Signal
3 DSL1
4 DSL2
Table 3-2 ADSL interface pin-out numbering
3.2 Command line interface
The command line interface (CLI) is RS-232 interface with an RJ-45
mechanical connector . The pin-out numbering is shown in Table 3-3.
18
Figure 3-4 CLI connector
PIN Signal Direction
1 107 DSR
(const. ON)
2 108 DTR <– Data terminal ready
3 109 DCD
(const. ON)
4 102 SG Signal ground
5 103 TxD <– Transmitted data
6 104 RxD –> Received data
7 105 RTS
(not in use)
8 106 CTS
(const. ON)
MDI signal
M5112-ter-
minal
–> Data set ready
–> Data channel re-
ceived line signal detector
<– Request to send
–> Clear to send
Table 3-3 Command line interface pin-out numbering
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3.3 Indicator lights
M1122 has eight indicator lights on the front panel: PWR, STA, COL,
ETH-1, ETH-2, ETH-3, ETH-4, and DSL. ST A indicator is red. Other
indicators are green.
Figure 3-5 M1122 front panel indicators
DSL
GREEN
Off ADSL link is down.
Blinks ADSL connection is being established.
On ADSL link is up.
ETH-
GREEN
Off Ethernet is down.
On 10Base-T Ethernet is functional
Blinks Receives traffic from Ethernet.
COL
GREEN
Blinks Collisions on the Ethernet. Note, that it is normal that some
collisions occur on the Ethernet.
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STA
RED
Off OK
On Hardware malfunction during startup.
PWR
GREEN
Off Power off.
On Power on.
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