SmartLink™ 4020 Series
Analog VoIP SoHo Router
The SmartLink 4020 VoIP SoHo Router connects your LAN, standard analog phones, and fax to any IP network. This full-featured IP router includes 3-way conference and multiple line support for low-cost telecommuter voice-data communications.



Need help?
Call Patton at +1 301 975 1000 or email sales@patton.com.

Features & Benefits
  • Two FXS Connections—Up to 2 FXS ports connect to a standard phone or PBX.
  • QoS Guaranteed—Quality of Service ensures voice traffic gets priority without shutting down your Ethernet LAN.
  • Firewall, NAT, DHCP, PPPoE—Connect to any broadband access provider, serve the whole network, and secure your data. User configurable IP services ensure every host is connected to the LAN.
  • SIP Signaling—Deploy into any multimedia, interactive, or softswitch network with the leading call and session signaling protocols.
  • Toll Quality CODECs & T.38 Fax—Uses standard G.711 or G.726 CODECs for toll-quality voice, or G.723 or G.729 for low-bandwidth applications.
  • HTTP/SNMP manageable from any location. (View Demo)


Overview
The SmartLink VoIP SoHo Router provides transparent connectivity for analog phones and faxes to the world of Internet voice. Connecting to any analog phone, fax or PBX, the SmartLink product is an effective and flexible solution for small offices and telecommuters to access Internet-based telephone services and corporate intranet systems across established LAN and Internet connections like xDSL and cable modems.

The SmartLink Model 4021 provides two RJ-45 Ethernet ports and one FXS (RJ-11) analog phone port. The SmartLink Model 4022 provides two RJ-45 Ethernet ports and two FXS (RJ-11) analog phone ports. Front panel LEDs quickly show at-a-glance the status of the system, LAN, WAN, and phone ports.

A full suite of IP features (DHCP, NAT/PAT, and NTP) are available to LAN devices attached downstream. VLAN tagging and prioritization enables voice traffic to be handled before data traffic. Support for PPPoE simplifies extending corporate intranet services to remote teleworkers.

The web interface offers two levels of configuration access for the network operator and end user. The friendly web interface and product labeling (Phone, LAN, WAN etc.) to help ensure a trouble-free installation for the end user. Configuration and firmware can be downloaded from a TFTP server.

The SmartLink is SIP standard compliant, so it can be used with most SIP-based telephony services. Analog phones attached to the SmartLink can use such advanced voice calling features as call forwarding, caller ID, 3-way calling, call holding, call retrieval and call transfer.


VoIP Integration
Using Patton's SmartLink VoIP SoHo routers with FXS supports seamless access to Internet telephony and data.

Model 4022 application diagram A


LAN/WAN QoS & Router
As a premise router, the SmartLink offers voice and complete Internet access. With dual 10/100 Ethernet ports, the SmartLink connects hosts to your LAN with VLAN tagging, DHCP server/client, and Firewall/ACL services. Use PPPoE and bring your voice and data to the WAN through a single and secure network connection.



Specifications
Voice Connectivity

2-wire Loopstart, RJ-11/12
Short haul loop 1.1 km @3REN
Caller-ID Type-1/2 FSK and ITU V.23/Bell 202 generation

Connectivity 2 10/100 Full Duplex/Autosensing Ethernet RJ-45
Voice Processing (signalling dependent)

SIP
Voice codecs:
G.711 A-Law/u-Law(64 kbps)
G.726 (ADPCM 40, 32, 24, 16 kbps)
G.723.1 (5.3 or 6.3 kbps)
G.729ab (8 kbps)
G.168 echo cancellation
4 parallel voice connections
DTMF detection and generation
Carrier tone detection and generation
Silence suppression and comfort noise
Configurable dejitter buffer
DTFM in-band & out-of-band
Configurable transmit packet length
RTP/RTCP (RFC 1889)
STUN

Fax and Modem Support G.711 transparent FAX
T.38 Fax relay (9.6 k, 14.4 k)
Voice Services/Features Anonymous CallerID block
Call blocking
Call forward�on busy
Call forward�selective
Call forward�unconditional
Call hold/retrieve
Call return
Call transfer�blind
Call transfer�with consultation
Call waiting/retrieval
Caller-ID
Conference drop
Conferencing (3-way calling)
Distinctive ring
Do not disturb
Hotline calling
Incoming CallerID on/off
IP URL dialing
Message waiting indication
Self-caller ID block
Speed dial
Voicemail message retrieval
Warmline calling
IP Services

IPv4 router; RIPv1, v2 (RFC 1058 and 2453)
IP filtering
NAPT
NTP
DMZ

DHCP client & server
PPPoE
Programmable static routes
ICMP redirect (RFC 792); Packet fragmentation
DiffServe/ToS set or queue per header bits
VLAN support 802.1p/q

Management Browser configuration interface
Multilevel security access
TFTP & HTTP configuration & firmware loading
SNMP v2 agent (MIB II and private MIB)
Syslog support
Operating Environment

Operating temperature: 0-40�C (32�104�F)
Operating humidity: 5-80% (non condensing) )

System Power: 100-240 VAC (50/60 Hz)
Compliance EMC compliance: EN55022 and EN55024
Safety compliance: EN 50950
CE compliance
FCC Part 15 Class B



Ordering Information Email: sales@patton.com    Tel: +1 301-975-1000
SL4021/EUI SmartLink 1 FXS VoIP GW, 2x 10/100bTX, External UI Power.
SL4022/EUI SmartLink 2 FXS VoIP GW-Router, 2x 10/100bTX, External UI Power.
 

Related Information
Articles (PDF) -- Requires Adobe Acrobat to view
Patton Brings Unified Communications to Boy Scouts of America Campground October 31, 2007
SmartNode™ Delivers VoIP-over-VPN Network with Secure, Encrypted Voice for 1200-Site Retail Chain August 08, 2007
SmartNode™ VoIP Delivers First-Line Business-Class Internet Telephony Services with green.ch February 06, 2006
SmartNode™ VoIP Powers inode Business Service for ISDN Subscribers December 21, 2005

Catalogs (PDF) -- Requires Adobe Acrobat to view
Patton Electronics Product Line Catalog #21 (High resolution, print quality) August 25, 2008
Patton Electronics Product Line Catalog #21 (Low resolution, for dial-up users) August 25, 2008

Certifications (PDF) -- Requires Adobe Acrobat to view
Declaration of Conformity - SmartLink™ Models SL4021, SL4022 March 04, 2009

Data Sheets (PDF) -- Requires Adobe Acrobat to view
SmartLink 4020 Datasheet August 24, 2009
SmartLink 4020 Datasheet (A4 page size) August 24, 2009
Enhanced Warranty March 01, 2006
VoIP Glossary March 04, 2005
VoIP Solutions Guide September 21, 2004

Manuals (PDF) -- Requires Adobe Acrobat to view
SmartLink 4020 Guide, Getting Started April 13, 2009
SmartLink 4020 Guide, Quick Start (English) July 13, 2007
SmartLink 4020 Guide, Quick Start (Spanish) July 06, 2005

News Releases
Patton's New VoIP IAD Wins Unified Communications 2007 Product of the Year March 17, 2008
Patton Wins INTERNET TELEPHONY® Product of the Year for the Third Consecutive Year January 07, 2008
Patton-Inalp Joins Triple Play Alliance, Promotes Multi-Vendor Interoperability October 01, 2007
Patton Receives INTERNET TELEPHONY Excellence Award September 12, 2007
With Over 1,000 Networking Products to Offer, Patton Publishes Dual Catalogs May 22, 2007
Patton Launches High-Performance PRI VoIP Gateway August 14, 2006
SmartNode™ VoIP CPEs Now Certified for Interoperability by Cirpack® July 31, 2006
Patton Unveils Industrial First-mile-Ethernet and Outdoor-VoIP Equipment at GlobalComm 2006 June 06, 2006
Massive VoIP Rollout Features Patton Equipment April 17, 2006
Patton Hardens Communication Products April 05, 2006
Patton and BroadSoft Deliver Interoperability to Carriers March 06, 2006
Patton Adds Voice-Encryption to SmartNode™ VoIP Routers February 22, 2006
Patton Receives Technology Champion Award February 01, 2006
Patton to Unveil New VoIP SoHo Solutions at CeBIT 2005. February 14, 2005

Tech Notes
MGCP Tech Notes - (PDF) September 25, 2007
Understanding Echo Problems - (PDF) September 19, 2007

White Papers (PDF) -- Requires Adobe Acrobat to view
VoIP in Industrial Networks - Implementing QoS for reliable voice over industrial Ethernet November 10, 2006
VoIP - Addressing QoS Beyond the Provider Network January 19, 2006

Software Upgrades
Model SmartLink 402x ( SL4021, SL4022 )
 
Frequently Asked Questions
 SmartLink VoIP 
 Gateways 
 The manual for the SL4020 shows a significant number of configuration parameters that I don’t see on the web configuration interface 
 Based on login, the Smartlink 4020 provides different configuration menus. The system login provides complete system configuration access. The user configuration login provides a subset of the system menus.

If you purchased your SmartLink 4020 from a VoIP service provider as a part of a calling service - The SmartLink 4020 configuration settings must interoperate with your VoIP service provider’s network. In an effort to provide you with reliable services, you provider may have decided not to provide customer access to the configuration interfaces.

 
 How do I access the web configuration interface?  
 The web configuration interface can be access by pointing your browser to the IP address of the SL4020. The web interface works with current versions of Internet Explorer and Netscape. It does not work with the Firefox browser. From the factory, the SL4020 WAN Ethernet interface is set to be a DHCP client and the LAN is set to be a DHCP server.
    Set your PC’s LAN interface card to obtain an address automatically.
    Connect your PC’s Ethernet cable tothe LAN interface
    http://192.168.1.1
    You will then be prompted to enter a login password.
You will need the configuration password to access the system. If you purchased your SmartLink 4020 from a VoIP service provider as a part of calling package, you will have to get the configuration password from your service provider. From the Patton factory, the default system password is “root”  
 What do I need to specify as the callerid for call forwarding, distinctive ring, caller id blocking and do not disturb? 
 The SL4020 supplementary calling features of selective call forwarding, distinctive ring, caller id blocking, and do not disturb require specification of the calling party. There are several places in the SIP invite header that could carry that caller information. The "FROM" header of a SIP Message is as follows:

���From: CallerId;tag=G1024jh3-NXr3s......
The CallerID field of this header is used in the "Caller ID" fields of supplementary service features. Some implementations identify the callerID as the "Display Name"

For example: The "FROM" header of a SIP Message may look like:

���From: 123;tag=G1024jh3-NXr3s......

To use call forwarding, distinctive ring, caller id blocking and do not disturb specify "123" as the caller id.  
 I want to be able to lift the handset and have the phone call immediately connected to the call destination. I do not have a SIP server involved.  
 There two things here, dialing by IP address and hotline dialing. The trick is putting the two together.
You can do direct IP dialing using the keypad on the phone. There's another FAQ posted on how to do IP address dialing.
In this case we need to change tell the SL4020 not to look for a SIP server and to set up a hotline call. Here is how you set up hotline dialing by IP address -
  1. Under Telephony, SIP - Set the SIP Registration Server Address: to the IP address (or domain name) of the Smartnode / FXO gateway. Save the changes on this screen. This setting directs the Smartlink to send the call to the FXO gateway.
  2. Under Telephony, SIP - Uncheck Send Registration Request with Expire Time:
  3. Under Telephony, phone one (or two), user information.
    1. Set the phone number to the number to be used for phone one. (For example: 555 for line one).
    2. Set the Caller id to be used for phone one.
  4. Under Telephony, phone one (or two), supplementary services set "IP dial srv " to YES.
  5. Under Dial out type, set to Hotline and code the SIP user part of the SIP call header. This will be combined with the IP address set in step #1 to form the complete SIP header.
  6. Save all the changes.
  7. Repeat steps 3-5 for phone 1 using a different phone number (For example: 444 for line two).
  8. Reload the SL4020.
  9. When the handset is lifted, a SIP call will be made to the destination sip address.
    SIP calls placed to 555@IP address of the SL4020 will ring phone one.

     
 How to extend dial tone (dial tone extension) from one location to another location without a SIP server. 
 The dial tone generated by a PSTN connection or a PBX can be extended over the Internet or an Intranet by using a pair of Smartnode 452x units or a Smartnode 452x and a Smartlink 402x unit. This FAQ describes how to perform dial tone extension using a Smartnode 452x and a Smartlink 402x. Smartnode to Smartnode configuration information is available under "Line Extensions" of the SN452x applications notes page. Once the setup is complete, the end user will be able to lift the handset on the analog phone, hear the dial tone from the PSTN or PBX and then dial a number just as if they were directly connected to the PSTN or PBX. Flash-hook is supported so features like call waiting and call hold will work. Tax pulse tone (not typically used in the USA) is not supported. The guide below assumes that WAN and LAN connectivity has already been established.

Hardware –

  • Smartlink 4021 or Smartlink 4022
  • Smartnode 4522, 4524, 4526 or 4528 with FXO ports (order code “JO” indicates FXO ports)
  • PSTN analog connection OR PBX with analog phone port
  • Analog phone

Physical Connectivity
Analog phone ----SL402x----- Internet/Intranet -----SN452x-------PSTN or PBX

In the SL4020

  1. Under Telephony, SIP –
    • Set “SIP Registration Server Address:” to the IP address or domain name of the SmartNode 4520
    • Uncheck “Send Registration Request with Expire Time:”
    • Save the changes
  2. Under Telephony, Phone 1
    • Set the phone number to the phone extension (example 111).
    • Optional - You can set caller id if you wish.
    • Under “Dial Out Type” , select Hotline from the drop down menu
    • Under “Hot Line Number”, enter the phone number that has been routed to the FXO port on the SN452x.
    • Save the changes
  3. Go to System,Reload and restart the SL4020

In the SmartNode 452x....Please use the Smartnode CO configuration information under "Line Extensions" of the SN452x applications notes. You will need to add call routing and mapping table to strip the called number that is passed from the Smartlink.

routing-table called-e164 TAB-IN
route ... dest-interface IF_FXO0 STRIP
mapping-table called-e164 to called-e164 STRIP
map ...% to \1
map default to ''

 
 How many VPN tunnels can be configured on the SL4020 
 The configurable limit is 8 now. Based on our preliminary study of code and hardware we believe this limit could be extended significantly. It will eventually be limited by memory and network resources.  
 How do I automatically forward calls to a different extension? 
 From the web interface - Click on Telephony, SIP extensions and select "Conditional Call Forwarding Timer:". Set the timer to the number of seconds to wait before call forwarding is triggered.

Suppose you want to forward calls to phone number 123456. Pick up the phone set, you will hear the dial tone. You have to dial *73 and you will hear the dial tone again. Dial 123456 and you will hear beep beep beep.

On hook the phone set. Calls will now forward to the number that was entered. Dial #73 to cancel call forward.  
 How do I directly dial an IP address? 
 The SL4020 must be configured to enable dialing by IP address. This can be done on user configuration menu under Telephony, Line. Once enabled, IP SIP addresses can be dialed directly by IP address using the telephone keypad.
For example: If you want to call 123456 at 192.168.1.3 port 5060.

You have to dial: *72123456*192*168*1*3*5060
*72 is the code to indicate that an IP call follows.

Optionally, you can skip "*5060" at the end, because it is the default value.  
 How do I use Speed Dial? 
 The SL4020 supports association of numbers to call with telephone handset keys. The configuration of speed dialing can be done using the telephone keypad or via the web. Up to eight speed dial numbers can be set.

Setting up speed dial using your telephone handset:

1. Press *81 on your telephone keypad to enable the speed dialing function. This only has to be done once.

2. Set up to eight speed dial numbers from your telephone keypad by entering *71xyyyyyyy where:

*71 = Is the code to set speed dial keys
x = The telephone keypad number to be set
yyyyyyy = The number to be called

For example: You want to set the telephone key number "2" to speed dial the destination 123456.
1. Dial *712123456 on the telephone and then hang up. Speed dial is now setup.
2. To use speed dial just press 2 and wait for the call to complete.

Speed dial can be disabled by entering #81 from your telephone keypad.

Note: SIP URLs cannot be included in speed dial settings.  
 Smart Link 4020 Calling Features 
  Patton SL4020 Calling Features

The SL4020 family supports advanced calling features that can be turned on and off from phones attached to the SL4020. (Your telephony service provider must enable your service for these calling features to work.)
FEATUREKEYPADFEATUREKEYPAD
Call HoldF(flash) 1Call AlternativeF*
ConferenceF7Conference DropF8
Call TransferF4..
Do Not Disturb ON*82Do Not Disturb OFF#82
Distinctive ON*90Distinctive OFF#90
Call Waiting ON*91Call Waiting OFF#91
Incoming Caller ID Display ON*92Incoming Caller ID Display OFF#92
Self Caller ID Block Service ON*93Self Caller ID Block Service OFF#93
Anonymous Call Rejection ON*94Anonymous Call Rejection OFF#94
Incoming Call Block ON*95Incoming Call Block OFF#95
Call Forward Selective ON*96Call Forward Selective OFF#96
Call Forward All ON*97Call Forward All OFF#97
Call Forward Busy ON*98Call Forward Busy OFF#98
Warm Line ON*99Warm Line OFF#99
IP Dialing ON*80IP Dialing OFF#80
Speed Dialing ON*81Speed Dialing OFF#81
Call Return*60..
Configure Warm Line Number*70*70yyyyy
where yyyyy = number to call
.
Configure Speed Dialing Number*71*71xyyyyy
where x = speed dial key
yyyyy = number to call
.
Configure IP Dialing*72*72xxx*xxx*xxx*xxx*yyyy
where xxx = IP Addr. Octets
*yyyy(Optional) = port number
.
Set Call Forward Number*73Wait for 3 short confirmation tones before hanging up..
Access Voicemail*86..

 
 How to perform factory hardware reset 
 

*** WARNING – This procedure will download and reload of new firmware. All LAN and WAN network connectivity information will be lost. Do not use this procedure unless directed to do so by customer service ***

The SmartLink 4020 can be hardware reset to force the download of new system firmware. This procedure requires access to firmware version software, typically loaded on a local device for downloading. Upon completion of the procedure, the LAN port will be set as a DHCP server with an IP address of 192.168.1.1 and the WAN port will be set as to be a DCHP client.

Procedure:

1. Power the SL4020 off.

2. Press the RESET button with a pencil and hold it.

3. To erase all configuration parameters, power on and hold the reset button for about 8 seconds.

4. Release the button.

5. The SL4020 will go to factory default, and the IP will reset to WAN: 172.16.0.1 and the LAN will be reset to 192.168.1.1.

6. To connect to the LAN port you may need to change the network settings on PC to DHCP client or to fixed IP addressing like: IP address 192.168.1.2, subnet 255.255.255.0, gateway/router 192.168.1.1.

6. Using your browser connect to the SL4020. For example: http://192.168.1.1.

7. Download new firmware to the SL4020 using HTTP or TFTP.

8. Reload the system when propmted.

9. Reconfigure the LAN and WAN network settings for your environment.

10. Reload the SL4020.

11. If you changed your PC's network settings, change them back to the original values.

 
 Telephones 
 I would like to be able to push one button and immediately get a dial tone from the PSTN so that I can make calls. I DO NOT have SIP server.  
 Sounds like you want to do something like press "9" for an outside line and then dial number......
This can be accomplished by using a combination of features on the Smartlink phones or gateways along with a Smartnode serving as the gateway to the PSTN. The resulting design results in two calls being made - one SIP call from the Smartlink device to the SmartNode gateway and a second PSTN call from the Smartnode gateway to the destination address on the PSTN.
How it works- The SL4050/SL4020 makes a SIP call to the Smartnode when the speed dial button is pushed. The Smartnode accepts the SIP call and presents dial tone from the FXO line. The user enters the number to be dialed which is transmitted as DMTF tones to the Smartnode that passes the tones to the PSTN. The PSTN completes the call to the number dialed.
Since there isn't SIP server, direct IP address or DNS calling can be used to send the SIP call directly to a Smartnode gateway with an PSTN connection.
To make calling easier on on the end user associate a speed dial button, like the telephone keypad number "9", with the IP address or DNS name of Smartnode.
Optionally the SL4050/10 phone has 10 line buttons that can be set as speed dial buttons. All the end user would do is push a line button and the next thing they would hear is a PSTN dial tone pass through by the Smartnode.
Please see the "FXO Interface Configuration" in the Smartnode configuration guide for information on setting up the Smartnode to pass dialtone from the PSTN to a SIP call.
From the SL4050 web configuration interface -
  1. Select Line Key Settings
  2. Pick a free line key and select "one touch dial"
  3. Enter the DNS name or IP address of the Smartnode gateway that has the PSTN FXO connection
  4. Click on "submit" to save the changes