Comtrend CT-820C User Manual

CT-820C VoIP Gateway User’s Manual

Version A2.0, December 26, 2007

261053-034

Preface

This manual provides information to network administrators. It covers the

installation, operation and application of this device. The individual reading this

manual is presumed to have a basic understanding of telecommunications.

Technical support

If you find the product to be inoperable or malfunctioning, please contact

technical support for immediate service by email at INT-support@comtrend.com

For product update, new product release, manual revision, or software upgrades,

visit Comtrend Corporation at http://www.comtrend.com

Warning

• Before servicing, disconnect power and telephone lines from the device

• Use an appropriate power supply and a UL Listed telephone line cord

Power specifications are clearly stated in Appendix C: Specifications

contained herein is proprietary to Comtrend Corporation. No part of this

document may be translated, transcribed, reproduced, in any form, or by any

means without prior written permission by Comtrend Corporation.

This document is subject to change without notice.

CHAPTER 1 INTRODUCTION .....................................................................................................4

1.1 FEATURES........................................................................................................................................4

1.2 APPLICATION ...................................................................................................................................5

1.3 LED INDICATORS ............................................................................................................................6

CHAPTER 2 HARDWARE SETUP................................................................................................7

CHAPTER 3 WEB USER INTERFACE........................................................................................8

3.1 DEFAULT SETTINGS .........................................................................................................................8

3.2 TCP/IP SETTINGS............................................................................................................................9

3.3 LOGIN PROCEDURE........................................................................................................................10

CHAPTER 4 DEVICE INFORMATION......................................................................................13

4.1 WAN .............................................................................................................................................14

4.2 STATISTICS.....................................................................................................................................15

4.2.1 LAN Statistics..................................................................................................................15

4.2.2 WAN Statistics.................................................................................................................16

4.3 ROUTE...........................................................................................................................................17

4.4 ARP...............................................................................................................................................18

4.5 DHCP ...........................................................................................................................................19

CHAPTER 5 ADVANCED SETUP ...............................................................................................20

5.1 WAN .............................................................................................................................................20

5.2 LAN..............................................................................................................................................28

5.3 NAT ..............................................................................................................................................29

5.3.1 Virtual Servers................................................................................................................29

5.3.2 Port Triggering...............................................................................................................31

5.3.3 DMZ Host.......................................................................................................................33

5.4 SECURITY ......................................................................................................................................34

5.4.1 IP Filtering.....................................................................................................................34

5.4.2 Parental Control.............................................................................................................37

5.5 QUALITY OF SERVICE ....................................................................................................................38

5.6 ROUTING .......................................................................................................................................39

5.6.1 Default Gateway.............................................................................................................39

5.6.2 Static Route.....................................................................................................................40

CHAPTER 6 WIRELESS ..............................................................................................................41

6.1 BASIC ............................................................................................................................................41

6.2 SECURITY ......................................................................................................................................43

6.3 MAC FILTER .................................................................................................................................46

6.4 WIRELESS BRIDGE.........................................................................................................................48

6.5 ADVANCED ....................................................................................................................................49

6.6 STATION INFO ................................................................................................................................52

CHAPTER 7 VOICE......................................................................................................................53

7.1 SIP ................................................................................................................................................53

7.2 DIAL PLAN.....................................................................................................................................58

7.3 TELEPHONE CALLS........................................................................................................................61

CHAPTER 8 DIAGNOSTICS .......................................................................................................63

CHAPTER 9 MANAGEMENT.....................................................................................................65

9.1 SETTINGS..................................................................................................................................65

9.1.1 Backup Settings...............................................................................................................65

9.1.2 Update Settings...............................................................................................................66

9.1.3 Restore Default...............................................................................................................67

9.2 SYSTEM LOG .................................................................................................................................68

9.3 SNMP AGENT ...............................................................................................................................71

9.4 INTERNET TIME .............................................................................................................................72

9.5 ACCESS CONTROL .........................................................................................................................73

9.5.1 Services...........................................................................................................................73

IP Addresses...................................................................................................................74

9.5.2

9.5.3 Passwords.......................................................................................................................75

9.6 UPDATE SOFTWARE .......................................................................................................................76

9.7 SA VE AND REBOOT ........................................................................................................................77

APPENDIX A: FIREW ALL................................................................................................................78

APPENDIX B: PIN ASSIGNMENTS.................................................................................................81

APPENDIX C: SPECIFICATIONS....................................................................................................82

APPENDIX D: SSH CLIENT .............................................................................................................84

Chapter 1 Introduction

The CT-820C is a powerful WLAN VoIP Gateway, providing predictable, real-time, toll-quality voice over the Internet. The CT-820C is designed for residential and business users with broadband DSL or cable access, who need to integrate Wi-Fi AP and VoIP technologies. The CT-820C offers users easy access to the Internet via WLAN or Ethernet and provides VoIP via standard analog phones.

1.1 Features

• VoIP and router integrated

• 802.11g/b access point

• VPN passthrough

• QoS for voice

• DNS SRV

• Dial plan

• Call hold

• Call waiting

• Call transfer

• Call forwarding

• 3-way conference

• Direct number dialing

• Supports emergency call

• Day-time parental control

• T.38 fax relay and passthrough

• Caller ID presentation and restriction

• Supports life line: PSTN alive when power off

• Remote administration: automatic firmware upgrade and configuration

Optional

o Centralized configuration and firmware upgrade

via APS (Automatic Provision Server)

1.2 Application

The following diagram depicts the application of the CT-820C.

1.3 LED Indicators

The front panel LED indicators are shown in this illustration and followed by detailed explanations in the table below.

LED Color Mode

POWER

LAN

4x~1x

PHONE1

PHONE2

WLAN

LINE

Green On The device is powered up.

Off The device is powered down.

Green On An Ethernet Link is established.

Off An Ethernet Link is not established.

Green Blink Data transmitting or receiving over LAN.

Green On The FXS phone 1 is off hook.

Off The FXS phone 1 is on hook.

Green On The FXS phone 2 is off hook.

Green On The wireless module is ready and idle.

Off The wireless module is disabled.

Green Blink Data transmitting or receiving over WLAN.

Green On An FXO line is off hook.

Off An FXO line is on hook.

Off

Function

The FXS phone 2 is on hook.

Green On An Ethernet Link is established.

WAN

Off An Ethernet Link is not established.

INTERNET Red On

Device attempted to become IP connected and failed (no DHCP response, no PPPoE response, PPPoE authentication failed, no IP address from IPCP, etc.)

Chapter 2 Hardware Setup

Follow the instructions below to complete the hardware setup.

The diagram below shows the back panel of the device.

Connection to Power

Connect the Power jack to the power cord. Attach the power adapter to the wall outlet or other AC source. At startup, the device will perform a self-test. Wait for a few seconds until the test is finished, then the device will be ready to operate.

Caution 1: If the device fails to power up, or it malfunctions, first verify that

the power supply is connected correctly. Then power it on again. If the problem persists, contact our technical support engineers.

Caution 2: Before servicing or disassembling this equipment always

disconnect all power cords and telephone lines from their outlets.

Wi-Fi antenna

Connection to Phone1/ Phone2 Connect a telephone to either RJ11 port for VoIP service.

Reset Button

Restore the default parameters of the device by holding down the Reset button until the front panel LED indicators start blinking simultaneously (~ 5 seconds). If held down for more than 12 seconds, the device will go into a firmware update state (CFE boot mode). The user can then update the device from any web browser using the default IP address (http://192.168.1.1) without login.

Connection to LAN/WAN ports

Use a RJ45 cable to connect to a network hub or PC. You can connect the device to up to four LAN devices and one WAN device. The ports are auto-sensing MDI/X and either straight-through cable or crossover cable can be used.

Connection to LINE port

If you wish to connect both the router and a telephone, connect the LINE port to a POTS splitter with a RJ11 connection cable.

Connection to WLAN

Attach the Wi-Fi antenna to enable this feature.

Chapter 3 Web User Interface

This section describes how to access the device via the web user interface using an Internet browser such as Microsoft Internet Explorer (version 5.0 and later).

3.1 Default Settings

The following are the default settings for the device.

• Local (LAN access) Username: root , Password: 12345

• Remote (WAN access) Username: support, Password: support

• LAN port IP address: 192.168.1.1

• Remote WAN access: disabled

• NAT and firewall: enabled

• DHCP server on LAN interface: enabled

• WAN IP address: none

Technical Note:

During power on, the device initializes all settings to default values. It will then read the configuration profile from the permanent storage section of flash memory. The default attributes are overwritten when identical attributes with different values are configured. The configuration profile in permanent storage can be created via the web user interface or telnet user interface, or other management protocols. The factory default configuration can be restored either by pushing the reset button for more than five seconds until the power indicates LED blinking or by clicking the Restore Default Configuration option in the Restore Settings screen.

3.2 TCP/IP Settings

DHCP Mode

When the device powers up, the DHCP server (on the device) will start automatically. To set your PC for DHCP mode, check the Internet Protocol properties of your Local Area Connection. You can set your PC to DHCP mode by selecting Obtain an IP address automatically in the dialog box shown below.

STATIC IP Mode

To configure the device manually, your PC must have a static IP address within the 192.168.1.x subnet. Follow the steps below to configure your PC IP address to use subnet 192.168.1.x. The following assumes you are running Windows XP.

STEP 1: From the Network Connections window, open the Local Area Connection.

(You may also access this screen by double-clicking the Local Area Connection icon on your taskbar.) Click the Properties button.

STEP 2: Select Internet Protocol (TCP/IP) and click the Properties

button. The screen should now display as below. Change the IP address to the domain of 192.168.1.x/24 (i.e. subnet mask=255.255.255.0).

STEP 3: Click OK to submit the settings.

3.3 Login Procedure

Perform the following steps to login to the web user interface.

NOTE: The default settings for this device can be found in 3.1 Default

Settings.

STEP 1: Start the Internet browser and enter the default IP address for the

device in the Web address field. For example, if the IP address is

192.168.1.1, type http://192.168.1.1.

NOTE: For local administration (i.e. LAN access), the PC running the browser

must be attached to the Ethernet, and not necessarily to the device. For remote access (i.e. WAN), use the remote username and password.

STEP 2: A dialog box will appear, such as the one below. Enter the default

username and password, as defined in section 3.1 Default Settings.

Click OK to continue.

NOTE: The login password can be changed later (see 9.5.3 Passwords)

STEP 3: After successfully logging in, you will reach this screen.

Chapter 4 Device Information

The web user interface is divided into two window panes, the main menu (at left) and the display screen (on the right). The main menu has the following options: Device Info, Advanced Setup, Wireless, Voice, Diagnostics, Management. Selecting one of these options will open a submenu with more options.

NOTE: The menu options available within the web user interface are based

upon the device configuration and user privileges (i.e. local or remote). For example, in the Advanced Setup menu, if NAT and Firewall are enabled, the main menu will display the NAT and Security submenus. If either is disabled, their corresponding menu will also be disabled.

Device Info is the first selection on the main menu so it will be discussed first. Subsequent chapters will introduce the other main menu options in sequence.

The Device Info submenu (outlined in red in the screenshot below) has the following selections: Summary, WAN, Statistics, Route, ARP, and DHCP.

The Device Info Summary screen (shown above) is the default startup screen.

It provides summary information regarding the device firmware version, TCP/IP settings, and the status of the two VOIP connections.

4.1 WAN

Select WAN from the Device Info submenu to display the configured PVC(s).

The display screen table headings (above) are described in the table below.

Con. ID Shows the connection ID

Category Shows the ATM service classes Service Shows the name for WAN connection Interface Shows connection interfaces Protocol Shows the connection type, such as PPPoE, PPPoA, etc. Igmp Shows the status of the IGMP Proxy function State Shows the connection state of the WAN connection Status Lists the WAN or PVC status (ex: Up/Down or Authentication Failure) IP Address Shows IP address for WAN interface

4.2 Statistics

The Statistics screens show detailed information for LAN or WAN Interfaces.

NOTE: These statistics are updated every 15 seconds.

4.2.1 LAN Statistics

This screen shows statistics for Ethernet and Wireless interfaces on the LAN.

Interface Shows connection interfaces in the following

format: nas_(VPI number_VCI number). These interfaces are devised by the system and not the user.

Received/Transmitted - Bytes

- Pkts

- Errs

- Drops

Rx/TX (receive/transmit) packet in Byte Rx/TX (receive/transmit) packets Rx/TX (receive/transmit) the packets which are errors, Rx/TX (receive/transmit) the packets which are dropped

4.2.2 WAN Statistics

This screen shows statistics for interfaces on the WAN.

Service Shows the service type, as configured by the

administrator

Protocol Shows the connection type, such as PPPoE,

PPPoA, etc.

Interface Shows connection interfaces in the following

format: nas_(VPI number_VCI number). These interfaces are devised by the system and not the user.

Received/Transmitted - Bytes

- Pkts

- Errs

- Drops

Rx/TX (receive/transmit) packet in Byte Rx/TX (receive/transmit) packets Rx/TX (receive/transmit) the packets which are errors, Rx/TX (receive/transmit) the packets which are dropped

4.3 Route

Choose Route to display the routes that the route information has learned.

Field Description

Destination Destination network or destination host Gateway Next hub IP address Subnet Mask Subnet Mask of Destination Flag U: route is up

!: reject route G: use gateway H: target is a host R: reinstate route for dynamic routing D: dynamically installed by daemon or redirect M: modified from routing daemon or redirect

Metric The 'distance' to the target (usually counted in hops). It is not used

by recent kernels, but may be needed by routing daemons. Service Shows the name for WAN connection Interface Shows connection interfaces

4.4 ARP

Click ARP to display the ARP information.

4.5 DHCP

Click DHCP to display the DHCP Leases information.

Chapter 5 Advanced Setup

This chapter explains the setup screens for the following services:

• WAN – Wide Area Network

• LAN – Local Area Network

• NAT – Network Address Translation

• SECURITY

• QUALITY OF SERVICE

• ROUTING

5.1 WAN

Follow the steps on the following pages to configure WAN interfaces. The screen below shows all configured WAN connections. The table below gives more details.

STEP 1: Click the Edit button next to the WAN connection you wish to configure.

Con. ID ID for WAN connection Category ATM service category, e.g. UBR, CBR, … Service Name of the WAN connection Interface Name of the interface for WAN Protocol Shows IPoW or PPPoE modes Igmp Shows enable or disable IGMP proxy State Shows enable or disable WAN connection

STEP 2: The WAN Configuration screen will display as below. Quality of Service

(QoS) is enabled when the box at bottom is checked (;). Click Next.

STEP 3: On this screen, you can choose either PPPoE or IPoE connection types.

Once you have chosen, click Next to proceed.

Important Note:

For PPPoE connections follow Steps 4-6

For IPoE connections follow Steps 7-9

PPPoE –PPP over Ethernet

Step 4: Enter the Username and Password and select the connection options.

Review the descriptions below for more details. Click Next to continue.

PPP Username/PPP Password

The PPP Username and the PPP password requirement are dependent on the particular requirements of the service provider. A maximum of 256 characters is allowed for the PPP user name and a maximum of 32 characters for PPP password.

PPPoE service name

For PPPoE service, PADI requests contain a service name-tag. Some PPPoE servers (or BRAS) of ISP check this service name-tag for connection.

Dial on Demand

The device can be configured to disconnect if there is no activity for a period of time by selecting this check box. When the checkbox is ticked, you must enter the inactivity timeout period. The timeout period ranges from 1 to 4320 minutes.

PPP IP Extension

The PPP IP Extension is a special feature deployed by some service providers. Unless your service provider specially requires this setup, do not select it.

The PPP IP Extension supports the following conditions:

• Allows only one PC on the LAN

• The public IP address assigned by the remote side using the PPP/IPCP

protocol is actually not used on the WAN PPP interface. Instead, it is forwarded to the PC’s LAN interface through DHCP. Only one PC on the LAN can be connected to the remote, since the DHCP server within the device has only a single IP address to assign to a LAN device.

• NAT and firewall are disabled when this option is selected.

• The device becomes the default gateway and DNS server to the PC

through DHCP using the LAN interface IP address.

• The device extends the IP subnet at the remote service provider to the

LAN PC. That is, the PC becomes a host belonging to the same IP subnet.

• The device bridges the IP packets between WAN and LAN ports, unless the

packet is addressed to the device’s LAN IP address.

Use Static IP Address

Unless your service provider specially requires this setup, do not select it. If selected, enter your static IP address in the IP Address field. Also, don’t forget to adjust your TCP/IP Settings as described in subsection 3.2 TCP/IP Settings.

Enable PPP Debug Mode

When this option is selected, the system will put more PPP connection information into the system log. This is for debugging errors and not for normal usage.

Step 5: On this screen you may enable/disable IGMP Multicast and WAN

service. Click Next to continue.

Enable IGMP Multicast checkbox

Tick the checkbox to enable IGMP multicast (proxy). IGMP (Internet Group Membership Protocol) is a protocol used by IP hosts to report their multicast group memberships to any immediately neighboring multicast device’s.

STEP 6: Click Next to display the WAN Setup-Summary screen that presents

the entire configuration summary review. Click Back to modify the settings.

Click Save/Reboot and skip to Step 10.

IPoE – Internet Protocol over Ethernet

STEP 7: The WAN IP Settings screen below allows for configuration of the

connection in DHCP (automatic) or Static IP (manual) modes.

Enter information provided to you by your ISP to configure the WAN IP settings. DHCP mode must be enabled when Obtain an IP address automatically is chosen. Changing the default gateway or the DNS affects the whole system. Where Static mode is selected, the IP address and subnet mask must be entered, however, the Use WAN interface field does not need to be selected.

STEP 8: The next screen combines NAT, IGMP and WAN service selection

options.

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