Grandstream Networks BroadWorks BroadSoft GXW-400X User manual

Grandstream Networks, Inc.
Analog IP Gateway GXW–400x
4 or 8 FXS Ports
GXW – 400x User’s Manual www.grandstream.com
Firmware Version 1.0.0.28 [e-mail]

Grandstream Networks, Inc. GXW-400x User Manual Page 2 of 32
Firmware 1.0.0.28 Last Updated: 1/2007
TABLE OF CONTENTS
GXW–400x Users Manual
WELCOME ................................................................................................................................................... 4
CONFIGURE YOUR GXW–400X ................................................................................................................. 5
EQUIPMENT PACKAGING ...........................................................................................................................................5
CONNECT THE GXW–400X ........................................................................................................................ 5
FIGURE 1: DIAGRAM OF GXW–400X BACK PANEL ..................................................................................................5
FIGURE 2: DIAGRAM OF GXW–400X DISPLAY PANEL .............................................................................................6
SAFETY COMPLIANCES ..............................................................................................................................................6
WARRANTY ...............................................................................................................................................................6
APPLICATION DESCRIPTION .................................................................................................................... 7
EXAMPLES OF GXW-400X CONFIGURATIONS ...........................................................................................................7
Application One: GXW- 400x FXS Gateway Configuration / PBX Scenario, VoIP ...........................................7
Application Two: GXW- 400x FXS Gateway Configuration / No PBX Scenario, VoIP......................................7
Application Three: GXW–400x & GXW–400x Scenario / Toll- Free Calling Between Locations ......................8
GXW–400X FEATURES............................................................................................................................... 8
SOFTWARE FEATURES OVERVIEW .............................................................................................................................8
HARDWARE SPECIFICATION.....................................................................................................................................10
USING THE WEB CONFIGURATION PAGES.......................................................................................... 11
QUICK END USER CONFIGURATION .........................................................................................................................11
CONFIGURING THE GXW–400X..............................................................................................................................11
IMPORTANT SETTINGS .............................................................................................................................................11
NAT Settings.......................................................................................................................................................11
DTMF Methods ..................................................................................................................................................12
Preferred VOCODER (Codec)...........................................................................................................................12
BASIC OPERATIONS ................................................................................................................................ 13
UNDERSTANDING GXW VOICE PROMPTS ...............................................................................................................13
PLACING PHONE CALLS ...........................................................................................................................................14
Calling phone or extension numbers..................................................................................................................14
Direct IP Calls ...................................................................................................................................................14
Examples of Direct IP Calls: .............................................................................................................................15
Call Hold............................................................................................................................................................15
Call Waiting .......................................................................................................................................................15
Call Transfer......................................................................................................................................................15
3-Way Conferencing ..........................................................................................................................................16
CALL FEATURES ...................................................................................................................................... 17
PSTN PASS THROUGH/LIFE LINE ............................................................................................................................17
T.38 FAX SUPPORT ..................................................................................................................................................17
END USER CONFIGURATION .................................................................................................................. 18
ADVANCED USER SETTINGS ....................................................................................................................................19
FIGURE 3: SCREENSHOT OF ADVANCED USER CONFIGURATION .............................................................................19
SAVING THE CONFIGURATION CHANGES .................................................................................................................25
FIGURE 4: SCREEN-SHOT OF SAVE CONFIGURATION PAGE .....................................................................................25
REBOOTING FROM REMOTE .....................................................................................................................................25
FIGURE 5: SCREEN-SHOT OF REBOOTING PAGE.......................................................................................................25
FIRMWARE UPGRADE ............................................................................................................................. 26
UPGRADE THROUGH HTTP......................................................................................................................................26
UPGRADE THROUGH TFTP ......................................................................................................................................26
No Local TFTP Server .......................................................................................................................................27
RESTORE FACTORY DEFAULT SETTING ...................................................................................................................28
GLOSSARY OF TERMS ............................................................................................................................ 29

Grandstream Networks, Inc. GXW-400x User Manual Page 3 of 32
Firmware 1.0.0.28 Last Updated: 1/2007
TABLE OF FIGURES
GXW–400x User Manual
FIGURE 1: DIAGRAM OF GXW–400X BACK PANEL ........................................................................................... 5
FIGURE 2: DIAGRAM OF GXW–400X DISPLAY PANEL ....................................................................................... 6
FIGURE 3: SCREENSHOT OF ADVANCED USER CONFIGURATION...................................................................... 19
FIGURE 4: SCREEN-SHOT OF SAVE CONFIGURATION PAGE ............................................................................. 25
FIGURE 5: SCREEN-SHOT OF REBOOTING PAGE ............................................................................................. 25
TABLE OF TABLES
GXW–400x User Manual
TABLE 1: DEFINITIONS OF THE GXW CONNECTORS.......................................................................................... 5
TABLE 2: DEFINITIONS OF THE GXW DISPLAY PANEL ....................................................................................... 6
TABLE 3: GXW–400X SOFTWARE FEATURES .................................................................................................. 9
TABLE 4: HARDWARE SPECIFICATION OF GXW–400X.................................................................................... 10
TABLE 5: DEFINITIONS OF THE GXW VOICE PROMPTS.................................................................................... 13
TABLE 6: CALL FEATURES TABLE (STAR CODE) ............................................................................................. 17
TABLE 7: BASIC SETTINGS PAGE DEFINITIONS ............................................................................................... 18
TABLE 8: STATUS PAGE DEFINITIONS ............................................................................................................ 19
TABLE 9: ADVANCED CONFIGURATION PAGE DEFINITIONS .............................................................................. 20
TABLE 10: FXS PORTS CONFIGURATION DEFINITIONS.................................................................................... 21
TABLE 11: PROFILE PAGE DEFINITIONS ......................................................................................................... 22
CONFIGURATION GUI INTERFACE EXAMPLES
GXW – 400x User Manual
(http://www.grandstream.com/user_manuals/GUI/GUI_GXW400x.rar)
1. SCREENSHOT OF ADVANCED USER CONFIGURATION PAGE
2. SCREENSHOT OF BASIC SETTINGS CONFIGURATION PAGE
3. SCREENSHOT OF FXS PORTS CONFIGURATION LOGIN PAGE
4. SCREENSHOT OF PROFILE 1CONFIGURATION PAGE
5. SCREENSHOT OF PROFILE 2CONFIGURATION PAGE
6. SCREENSHOT OF STATUS CONFIGURATION LOG-IN PAGE

Grandstream Networks, Inc. GXW-400x User Manual Page 4 of 32
Firmware 1.0.0.28 Last Updated: 1/2007
WELCOME
Thank you for purchasing the Grandstream GXW–400x Analog FXS IP Gateway. The GXW–400x offers
an easy to manage, easy to configure IP communications solution for any business with virtual and/or
branch locations. The GXW–400x supports popular voice codecs and is designed for full SIP compatibility
and interoperability with 3rd party SIP providers, thus enabling you to fully leverage the benefits of VoIP
technology, integrate a traditional phone system into a VoIP network, and efficiently manage
communication costs.
This manual will help you learn how to operate and manage your GXW FXS Analog IP Gateway and
make the best use of its many upgraded features including simple and quick installation, multi-party
conferencing, and direct IP-IP Calling. This IP Analog Gateway is very easy to manage and scalable,
specifically designed to be an easy to use and affordable VoIP solution for the small – medium business
or enterprise.
Gateway GXW–400x Overview
The new GXW–400x series has a compact and quiet design (no fans) and offers superb audio quality,
rich feature functionality, strong security protection, and good manageability. It is auto-configurable,
remotely manageable and scalable.
The GXW–400x features 4 or 8-port FXS interface for analog telephones, dual 10M/100Mbps network
ports with integrated router, PSTN life line in case of power failure, and an RS232 serial port for
administration. In addition, it supports 2 SIP account profiles, caller ID for various countries/regions, T.38
fax, 1 or 2-stage dialing, flexible dialing plans, security protection (SIPS/TLS), comprehensive voice
codecs including G.711 (a/u-law), G.723.1, G.726, G.728, G.729A/B/E and iLBC.
Caution: Changes or modifications to this product not expressly approved by Grandstream, or operation
of this product in any way other than as detailed by this User Manual, could void your manufacturer
warranty.
•This document is contains links to Grandstream GUI Interfaces. Please remember to download these
examples http://www.grandstream.com/user_manuals/GUI/GUI_GXW400x.rar for your reference.
•This document is subject to change without notice. The latest electronic version of this user manual
is available for download from the following location:
http://www.grandstream.com/user_manuals/GXW400x_userManual.pdf
•Reproduction or transmittal of the entire or any part, in any form or by any means, electronic or print,
for any purpose without the express written permission of Grandstream Networks, Inc. is not
permitted.

CONFIGURE YOUR GXW–400X
Connecting your GXW–400x is easy. Before you begin, please verify the contents of the GXW–400x
package.
EQUIPMENT PACKAGING
Unpack and check all accessories. Equipment includes:
•one 12V universal power adapter
•one Ethernet cable
•one device unit
CONNECT THE GXW–400X
Managing the GXW and connecting the unit to the VoIP network is very simple. Follow these four (4)
steps to connect your GXW to the Internet and access the unit’s configuration pages. The GUI pages
will guide you through the remaining steps to set-up your gateway. Examples of the GUI Interfaces can
be downloaded from: http://www.grandstream.com/user_manuals/GUI/GUI_GXW400x.rar.
FIGURE 1: DIAGRAM OF GXW–400X BACK PANEL
LAN/WAN
RJ-45 Ethernet
Ports
FXS
Ports
Console
Connection
(PC
connection)
GXW- 400x
PSTN
Line
Power
Supply
Reset
TABLE 1: DEFINITIONS OF THE GXW CONNECTORS
LAN (or PC) PC can be connected here as DHCP client to obtain IP Address from the
internal DHCP server of the unit.
WAN (or LAN) Connect to the internal LAN network or router.
RESET Factory Reset button. Press for 7 seconds to reset factory default settings.
DC 12V Power adapter connection
CONSOLE Console connection for a PC.
FXS1 - FXS8 FXS ports to be connected to physical PSTN lines.
Grandstream Networks, Inc. GXW-400x User Manual Page 5 of 32
Firmware 1.0.0.28 Last Updated: 1/2007

Once the GXW is turned on and configured, the front display panel indicates the status of the unit.
FIGURE 2: DIAGRAM OF GXW–400X DISPLAY PANEL
FXS port status
GXW- 400x
Display LEDs
TABLE 2: DEFINITIONS OF THE GXW DISPLAY PANEL
Power LED Indicates Power. Remains ON when Power is connected and turned ON.
Ready LED Remains ON after boot-up.
LAN LED Indicates LAN (or WAN) port activity
WAN LED Indicates PC (or LAN) port activity
LEDs 1 - 8 Indicate status of the respective FXS Ports on the back panel
Busy - ON (Solid Green)
Available - OFF
NOTE: All LEDs display green when ON. Slow blinking of FXS Port LEDs indicates Voice Mail for that
port.
SAFETY COMPLIANCES
The GXW–400x is compliant with various safety standards including FCC/CE. Its power adaptor is
compliant with UL standard. Warning: use only the power adapter included in the GXW–400x package.
Using an alternative power adapter may permanently damage the unit.
WARRANTY
Grandstream has a reseller agreement with our reseller customer. End users should contact the company
from whom you purchased the product for replacement, repair or refund.
If you purchased the product directly from Grandstream, contact your Grandstream Sales and Service
Representative for a RMA (Return Materials Authorization) number. Grandstream reserves the right to
remedy warranty policy without prior notification.
Grandstream Networks, Inc. GXW-400x User Manual Page 6 of 32
Firmware 1.0.0.28 Last Updated: 1/2007

APPLICATION DESCRIPTION
There are three scenarios where the GXW–400x series can be effectively used to enable any business to
leverage the benefits of VoIP and the Internet.
EXAMPLES OF GXW-400X CONFIGURATIONS
Application One: GXW- 400x FXS Gateway Configuration / PBX Scenario, VoIP
INTERNET
CLOUD
Anywhere in the world
GXW FXS Series
4 or 8 Ports
PSTN
Analog
Lines
PBX
Trunk Line
FXS Trunks
Application Two: GXW- 400x FXS Gateway Configuration / No PBX Scenario, VoIP
INTERNET
CLOUD
Anywhere in the world
GXW FXS Series
4 or 8 Ports
PSTN
Analog
Lines
FXS Gateway acts as a ‘virtual office’,
connecting analog lines directly to the
gateway
Grandstream Networks, Inc. GXW-400x User Manual Page 7 of 32
Firmware 1.0.0.28 Last Updated: 1/2007

Application Three: GXW–400x & GXW–400x Scenario / Toll- Free Calling Between Locations
Branch A - Boston, MA
4 employees
Branch B – Denver, CO
4 employees
I
In nt te er rn ne et t
C
Cl lo ou ud d
GXW-400x
GXW-400x
PSTN
Analog
Lines
P
PS ST TN N
C
Cl lo ou ud d
FX0
GXW–400X FEATURES
The GXW–400x is a next generation IP voice gateway that is interoperable and compatible with leading
IP-PBXs, SoftSwitches and SIP platforms. The GXW–400x FXS series is auto-configurable, remotely
manageable and scalable. There are two FXS models, the GXW-4004 and GXW-4008, each offering
superb voice quality, traditional telephony functionality, easy deployment, and 4 or 8 FXS ports
respectively. Each model features flexible dialing plans, PSTN failover, integrated call routing to support
a pure IP network call and an external power supply.
SOFTWARE FEATURES OVERVIEW
•4 or 8 FXS ports
•Two RJ-45 ports (switched or routed)
•Multiple SIP accounts & profiles (4 or 8 accounts / choice of 2 profiles per account)
•Supports Voice Codecs:
G711(a/µ, Annex I & II), G723.1A, G726 (ADPCM), G728, G729 A/B/E, iLBC
•T.38 Fax
•G.168 Echo Cancellation
•Voice Activation Detection (VAD), Comfort Noise Generation (CNG), and Packet Loss
Concealment (PLC)
•Supports PSTN/PBX analog telephone sets or analog trunks
Grandstream Networks, Inc. GXW-400x User Manual Page 8 of 32
Firmware 1.0.0.28 Last Updated: 1/2007

Grandstream Networks, Inc. GXW-400x User Manual Page 9 of 32
Firmware 1.0.0.28 Last Updated: 1/2007
TABLE 3: GXW–400X SOFTWARE FEATURES
GXW– 400x FXS Analog Gateway Series
Telephone Interfaces GXW-4004: 4 ports, 4 SIP accounts & choice of 2 profiles
GXW-4008: 8 ports, 8 SIP accounts & choice of 2 profiles
FXS, RJ-11
Network Interface Two (2) 10M/100 Mbps, RJ-45
LED Indicators Power and Line LEDs
Voice over Packet
Capabilities
Voice Activity Detection (VAD) with CNG (comfort noise generation) and PLC
(packet loss concealment), AEC with NLP,
Packetized Voice Protocol Unit (supports RTP/RTCP and AAL2 protocol),
G.168 compliant Echo Cancellation, Dynamic Jitter Buffer, Modem detection
& auto-switch to G.711
PSTN Fail-over PSTN failover on power failure
Voice Compression G.711 + Annex I (PLC), Annex II (VAD/CNG format) encoder and decoder,
G.723.1A, G.726(ADPCM), G.729A/B/E, iLBC
G.726 provides proprietary VAD, CNG, and signal power estimation
Voice Play Out unit (reordering, fixed and adaptive jitter buffer, clock
synchronization), AGC (automatic gain control),
Status output, Decoder controlling via voice packet header
DHCP Server/Client Yes, NAT Router or Switched Mode
Fax over IP T.38 compliant Group 3 Fax Relay up to 14.4kpbs and auto-switch to G.711
for Fax Pass-through (pending),
Fax Datapump V.17, V.19, V.27ter, V.29 for T.38 fax relay
QoS Diffserve, TOS, 802.1 P/Q VLAN tagging
IP Transport RTP/RTCP
DTMF Method flexible DTMF transmission method, User interface of In-audio, RFC2833,
and/or SIP Info
IP Signaling SIP (RFC 3261)
Provisioning TFTP, HTTP, HTTPS (pending)
Control TLS/SIPS
Management Syslog support, HTTPS and telnet (pending), remote management using Web
browser
Dimensions
(H x W x D)
35 x 135 x 225 mm
Mounting Rack mount, Wall mount, Desktop
Short and long haul REN3: Up to150 ft on 24 AWG line
Caller ID Bellcore Type 1 & 2, ETSI, BT, NTT, and DTMF-based CID
Polarity Reversal /
Wink
Yes
EMC EN55022/EN55024 and FCC part15 Class B
Safety UL

Grandstream Networks, Inc. GXW-400x User Manual Page 10 of 32
Firmware 1.0.0.28 Last Updated: 1/2007
HARDWARE SPECIFICATION
The hardware specifications of the GXW FXS series are detailed in Table 4.
TABLE 4: HARDWARE SPECIFICATION OF GXW–400X
Ports 4 or 8 FXS Ports
LAN interface 2 x RJ45 10/100Mbps (switched or routed)
PSTN Port PSTN fail-over port
LED 8 LEDs (GREEN)
PC PC console connection
Universal Switching
Power Adaptor
Input: 100-240V AC, 50/60Hz, 0.5A Max
Output: 12V DC, 1.25A
UL certified
Dimension 225mm (L) x 135mm (W) x 35mm (H)
Weight 0.29 lbs (3.5 oz)
Temperature 32~104°F / 0~40°C
Humidity 10% - 90% (non-condensing)
Compliance FCC, CE

Grandstream Networks, Inc. GXW-400x User Manual Page 11 of 32
Firmware 1.0.0.28 Last Updated: 1/2007
USING THE WEB CONFIGURATION PAGES
QUICK END USER CONFIGURATION
1. Connect the Power to the GXW-400x unit.
2. Connect an Ethernet cable between the LAN port on GXW–400x to your PC.
3. Your PC will be assigned an IP address like 192.168.2.100
4. Launch web browser and type in http://192.168.2.1 at address of web browser. This will connect
you to the web server of GXW–400x. Once this HTTP request is entered and sent from a Web
browser, the GXW–400x will respond with a login screen.
5. Log-in to the GUI using the password “admin” for the Advanced Configuration Page or “123” for
the Basic Configuration Page.
CONFIGURING THE GXW–400X
1. There are six different tabs (Status, Basic Settings, Advanced Settings, Profile 1, Profile 2 and
FXS Ports) on the top of the screen (after login). To open each page, click on the tab.
2. Click on Profile 1 to enter your SIP Server/ SIP Proxy/Registrar information. Enter the IP Address
(or FQDN) of the Server under: SIP Server and/or Outbound Proxy.
3. Click on FXS ports to enter the extensions or account information. You will need to fill in the
following information for each extension. Once the extensions are configured, you are finished.
FXS
Port
SIP User
ID
Auth ID Authentication
Password
Name Profile
1 601 601 *** Ext 1 Profile1
2 602 602 *** Ext 2 Profile1
3 603 603 *** Ext 3 Profile1
4 604 604 *** Ext 4 Profile1
5 605 605 *** Ext 5 Profile1
6 606 606 *** Ext 6 Profile1
7 607 607 *** Ext 7 Profile1
8 608 608 *** Ext 8 Profile1
4. Click Update after changing any setting and then Re-boot to confirm changes.
5. After reboot, check the Status Page to confirm the extensions are successfully registered. You
can now use your standard phones connected to ports FXS1 to FXS8 to make calls.
IMPORTANT SETTINGS
The end-user must configure the following settings according to the local environment. NOTE: Most
settings on the web configuration pages are set to the default values.
NAT Settings
If you plan to keep the gateway within a private network behind a firewall, we recommend using STUN
Server. The following three (3) settings are useful in the STUN Server scenario:
1. STUN Server (under Advanced Settings webpage)
Enter a STUN Server IP (or FQDN) that you may have, or look up a free public STUN Server on the
internet and enter it on this field. If using Public IP, keep this field blank.
2. Use Random Ports (under Advanced Settings webpage)
This is a tricky setting. It really depends on your network settings, so set this parameter to Yes or No,
whichever works. If using a Public IP address, set this parameter to No.

Grandstream Networks, Inc. GXW-400x User Manual Page 12 of 32
Firmware 1.0.0.28 Last Updated: 1/2007
3. NAT Traversal (under the Profile web pages)
Set this to Yes when gateway is behind firewall on a private network.
DTMF Methods
DTMF Settings are in Profile pages.
•DTMF in-audio
•DTMF via RTP (RFC2833)
•DTMF via SIP INFO
Enable one or more DTMF methods based on your PBX system.
Preferred VOCODER (Codec)
The GXW–400x supports a broad range of voice codecs. Under Profile web pages, choose your
preferred order of different codecs:
•PCMU/A (or G711µ/a)
•G729 A/B/E
•G728
•G723
•G726-32
•iLBC

Grandstream Networks, Inc. GXW-400x User Manual Page 13 of 32
Firmware 1.0.0.28 Last Updated: 1/2007
BASIC OPERATIONS
UNDERSTANDING GXW VOICE PROMPTS
GXW–400x has a stored voice prompt menu for quick browsing and simple configuration. To enter the
voice prompt menu, press *** on the standard analog phone connected to any FXS port.
TABLE 5: DEFINITIONS OF THE GXW VOICE PROMPTS
Menu Voice Prompt User’s Options
Main Menu “Enter a Menu Option” Enter “*” for the next menu option
Enter “#” to return to the main menu
Enter 01 – 06, 47, 86 or 99 Menu option
01 “DHCP Mode”, or
“Static IP Mode”
Enter ‘9’ to toggle the selection
If user selects “Static IP Mode”, user need configure all the
IP address information through menu 02 to 05. If user
selects “Dynamic IP Mode”, the device will retrieve all IP
address information from DHCP server automatically when
user reboots the device.
02 “IP Address “ + IP address The current WAN IP address is announced
Enter 12-digit new IP address if in Static IP Mode.
03 “Subnet “ + IP address Same as Menu option 02
04 “Gateway “ + IP address Same as Menu option 02
05 “DNS Server “ + IP address Same as Menu option 02
07 Preferred Vocoder Enter “9” to go to the next selection in the list:
•PCM U / PCM A
•G-723
•G-729
•iLBC
•G-726-32
•G728
•G729E
10 “MAC Address” Announces the Mac address of the unit.
12 WAN Port Web Access Enter “9” to toggle between enable and disable
13 Firmware Server IP
Address
Announces current Firmware Server IP address. Enter 12
digit new IP address.
14 Configuration Server IP
Address
Announces current Config Server Path IP address. Enter
12 digit new IP address.
15 Upgrade Protocol Upgrade protocol for firmware and configuration update.
Enter “9” to toggle between TFTP and HTTP
16 Firmware Version Firmware version information.
17 Firmware Upgrade Firmware upgrade mode. Enter “9” to rotate among the
following three options:
1. always check
2. check when pre/suffix changes
3. never upgrade
47 “Direct IP Calling” User will be prompted with a dial tone to dial a 12-digit IP
address to make a direct IP call.
(For details, see Make a Direct IP Call)
99 “RESET” Enter “9” to reboot the device; or
Enter MAC address to restore factory default setting (page
28)
“Invalid Entry” Automatically returns to Main Menu

Grandstream Networks, Inc. GXW-400x User Manual Page 14 of 32
Firmware 1.0.0.28 Last Updated: 1/2007
Five Success Tips when using the Voice Prompt
1. “*” shifts down to the next menu option
2. “#” returns to the main menu
3. “9” functions as the ENTER key in many cases to confirm an option
4. All entered digit sequences have known lengths - 2 digits for menu option and 12 digits for IP
address. For IP address, add 0 before the digits if the digits are less than 3 (i.e. - 192.168.0.26
should be key in like 192168000026. No decimal is needed).
5. Key entry can not be deleted but the phone may prompt error once it is detected
PLACING PHONE CALLS
Calling phone or extension numbers
There are currently two methods to make an extension number call:
1. Dial the numbers directly and wait for 4 (default) seconds.
2. Dial the numbers directly, and press # (assuming that “use # as dial key is selected in web
configuration).
Examples:
•To dial another extension on the same proxy, such as 1008, simply pick up the attached phone,
dial 1008 and then press the # or wait for 4 seconds.
•To dial a PSTN number such as 6266667890, you may need a prefix number followed by the
phone number. Please check with your VoIP service provider for correct information. If your
phone is assigned a PSTN-like number such as 6265556789, it is likely that you dial “1” prior to
the number - 16266667890.
Direct IP Calls
Direct IP calling allows two parties, that is, an FXS Port with an analog phone and another VoIP Device,
to talk to each other in an ad hoc fashion without a SIP proxy. A direct IP call can be completed if:
1. Both GXW–400x and other VoIP Device, have public IP addresses, or
2. Both GXW–400x and other VoIP Device are on the same LAN using private IP addresses, or
3. Both GXW–400x and other VoIP Device can be connected through a router using public or
private IP addresses (with necessary port forwarding or DMZ).
To make a direct IP call
1. Pick up the analog phone then access the voice menu prompt by dial “***”
2. Dial “47” to access the direct IP call menu
3. Enter a 12-digit target IP address after the dial tone and voice prompt “Direct IP Calling”
Destination ports can be specified by using “*4” (encoding for “:”) followed by the port number.
NOTE: When completing direct IP call, the “Use Random Port” should set to “NO”. You can not make
direct IP calls between FXS1 to FXS2 since they are using same IP.

Grandstream Networks, Inc. GXW-400x User Manual Page 15 of 32
Firmware 1.0.0.28 Last Updated: 1/2007
Examples of Direct IP Calls:
1. If the target IP address is 192.168.0.10, the dialing convention is
Voice Prompt with option 47, then 192 168 000 010
Press the “#” key if it is configured as a send key or wait for more than 5 seconds.
2. If the target IP address/port is 192.168.1.20:5062, then the dialing convention would be:
Voice Prompt with option 47, then 192168001020*45062 followed by pressing the “#” key if it is
configured as a send key or wait for 4 seconds.
Call Hold
Place a call on hold by pressing the “flash” button on the analog phone (if the phone has that button).
Press the “flash” button again to release the previously held caller and resume conversation. If no “flash”
button is available, then use “hook flash” (toggle on-off hook quickly). You may drop a call using hook
flash.
Call Waiting
Call waiting tone (series of quick consecutive dial tones) during a conversation indicates an incoming call
(if the call waiting feature is enabled). Press the flash button to place the current Caller on hold and switch
to the other call. Press the flash button to toggle between two active calls.
Call Transfer
Blind Transfer
Assume that call Caller A and B are in conversation. A wants to Blind Transfer B to C:
1. Caller A presses FLASH on the analog phone to hear the dial tone.
2. Caller A dials *87 then dials caller C’s number, and then # (or wait for 4 seconds)
3. Caller A can hang up.
NOTE: “Enable Call Feature” must be set to “Yes” in web configuration page.
Caller A can hold the call and wait for one of three situations:
1. A quick confirmation tone (similar to call waiting tone) followed by a dial tone. This indicates
the transfer is successful (transferee has received a 200 OK from transfer target). At this point,
Caller A can either hang up or make another call.
2. A quick busy tone followed by a restored call (on supported platforms only). This means the
transferee has received a 4xx response for the INVITE and we will try to recover the call. The
busy tone is just to indicate to the transferor that the transfer has failed.
3. Continuous busy tone. The phone has timed out. Note: continuous busy tone does not
indicate the transfer has been successful, nor does it indicate the transfer has failed. It often
means there was a failure to receive second NOTIFY – check firmware for most recent release.
Attended Transfer
Assume that Caller A and B are in conversation. Caller A wants to Attend Transfer B to C:
1. Caller A presses FLASH on the analog phone to get a dial tone
2. Caller A then dials Caller C’s number followed by # (or wait for 4 seconds).
3. If Caller C answers the call, Caller A and Caller C are in conversation. Then A can hang up to
complete transfer.
4. If Caller C does not answer the call, Caller A can press “flash” to resume call with Caller B.
NOTE: When Attended Transfer fails and A hangs up, the GXW will ring back Caller A to remind A that B
is still on the call. Caller A can pick up the phone to restore conversation with B.

Grandstream Networks, Inc. GXW-400x User Manual Page 16 of 32
Firmware 1.0.0.28 Last Updated: 1/2007
3-Way Conferencing
Bellcore Style 3-way Conference
The GXW–400x supports Bellcore Style 3-way Conference.
Directions for using 3-Way Conferencing:
Caller A wants to bring third Caller C into conference:
1. Caller A presses FLASH to receive a dial tone. (Hook Flash for older model phones)
2. Caller A dials Caller C’s number then # (or wait for 4 seconds).
3. If Caller C answers call, then Caller A presses “flash” to bring Parties B & C into conference.
4. If Caller C does not answer the call, Caller A can press “flash” to resume call with Caller B.

Grandstream Networks, Inc. GXW-400x User Manual Page 17 of 32
Firmware 1.0.0.28 Last Updated: 1/2007
CALL FEATURES
The GXW–400x supports the traditional telephony features available in a PBX as well as additional
advanced telephony features.
TABLE 6: CALL FEATURES TABLE (STAR CODE)
Key Call Features
*30 Block CallerID (for all-config change)
*31 Send CallerID (for all-config change)
*67 Block CallerID (per call)
*82 Send CallerID (per call)
*50 Disable Call Waiting (for all-config change)
*51 Enable Call Waiting (for all-config change)
*70 Disable Call Waiting (Per Call)
*71 Enable Call Waiting (Per Call)
*72 Unconditional Call Forward: Dial “*72” for a dial tone. Dial the forwarding number
followed by “#”. Wait for dial tone and hang up. (dial tone indicates successful forward)
*73 Cancel Unconditional Call Forward: Dial “*73” and wait for dial tone, then hang up.
*87 Blind Transfer
*90 Busy Call Forward: Dial “*90” for a dial tone. Dial the forwarding number followed by
“#”. Wait for dial tone then hang up.
*91 Cancel Busy Call Forward: dial “*91”. Wait for dial tone. Hang up.
*92 Delayed Call Forward: Dial “*92” for a dial tone. Dial the forwarding number followed
by “#”. Wait for dial tone then hang up.
*93 Cancel Delayed Call Forward: Dial “*93” for a dial tone, then hang up.
Flash/Hook If user hears call waiting beep, flash/hook will switch to the new incoming call. Also
used to switch to a new channel for a new call.
PSTN PASS THROUGH/LIFE LINE
The RJ-11 line jack on the GXW–400x side functions as a pass through jack when the GXW–400x is out
of power. The pass through/life line enables the user to use the analog phone for PSTN calls directly
without using an access code.
T.38 FAX SUPPORT
GXW–400x supports fax in two modes: 1) T.38 (Fax over IP) and 2) fax pass through. T.38 is the
preferred method because it is more reliable and works well in most network conditions. If the service
provider supports T.38, please use this method by selecting T.38 as fax mode (default). If the service
provider does not support T.38, pass-through mode may be used.

Grandstream Networks, Inc. GXW-400x User Manual Page 18 of 32
Firmware 1.0.0.28 Last Updated: 1/2007
END USER CONFIGURATION
The GXW FXS Series uses an imbedded web-browser to simply the configuration process. There are six
(6) screenshots that the end user should become familiar with during the configuration process.
Download these pages now http://www.grandstream.com/user_manuals/GUI/GUI_GXW400x.rar and
review the term definitions found in Tables 7 – 11.
TABLE 7: BASIC SETTINGS PAGE DEFINITIONS
End User Password Password to access the Web Configuration Menu. This field is case sensitive
with a maximum length of 25 characters.
Web Port By default, HTTP uses port 80. This field is for customizable web port.
IP Address There are two modes to operate the GXW–400x :
DHCP mode: all the field values for the Static IP mode are not used (even
though they are still saved in the Flash memory.) The GXW–400x acquires its IP
address from the first DHCP server it discovers from the LAN it is connected.
Using the PPPoE feature: set the PPPoE account settings. The GXW–400x will
establish a PPPoE session if any of the PPPoE fields is set.
Static IP mode: configure the IP address, Subnet Mask, Default Router IP
address, DNS Server 1 (primary), DNS Server 2 (secondary) fields. These fields
are set to zero by default.
Time Zone Controls how the date/time is displayed according to the specified time zone.
Self Defined Time
Zone
TBD
Device Mode This parameter controls whether the device is working in NAT router mode or
Bridge mode. Save the setting and reboot prior to configuring the GXW.
WAN side HTTP
Access
If set to “Yes”, user can access the configuration page through the WAN port,
instead of through the “PC” port. Warning: this configuration is less secure than
default option. Default is No.
Reply to ICMP on
WAN port
If set to “Yes”, the GXW400x will respond to the PING command from other
computers, but it also is vulnerable to the DOS attack. Default is No.
Cloned WAN MAC
Addr
Enables a specific MAC address. Set in Hex format.
LAN Subnet Mask Sets the LAN subnet mask. Default value is 255.255.255.0
LAN DHCP Base IP Base IP for the LAN port which functions as a Gateway for the subnet.
Default value is 192.168.2.1.
DHCP IP Lease Time Value is set in units of hours. Default value is 120 hrs (5 Days.) The time IP
address is assigned to the LAN clients.
DMZ IP Forward all WAN IP traffic to a specific IP address if no matching port is used by
GXW400x or defined in port forwarding.
Port Forwarding Forwards a matching (TCP/UDP) port to a specific LAN IP address with a
specific (TCP/UDP) port.

In addition to the Basic Settings configuration page, the end user also has access to the Device Status
page.
TABLE 8: STATUS PAGE DEFINITIONS
MAC Address The device ID in HEX format. This is needed for ISP troubleshooting.
WAN IP Address Shows LAN IP address of GXW–400x
Product Model Contains the product model info.
Software Version Program: This is the main software release. Boot and Loader are not changed
often.
System Up Time Shows system up time since the last reboot.
PPPoE Link Up Shows whether the PPPoE connection is running if connected to DSL modem.
Detected NAT Type Shows type of NAT the GXW–400x is connected to via its WAN port. It is
based on STUN protocol.
Port Indicates whether the different FXS Ports are registered to the SIP server(s).
ADVANCED USER SETTINGS
Log-in to the Advanced User Configuration Page the same way as for the basic configuration page. Log-
in using either of the following passwords: “admin” or “123”.
FIGURE 3: SCREENSHOT OF ADVANCED USER CONFIGURATION
Grandstream Device Configuration
Password
Login
All Rights Reserved Grandstream Networks, Inc. 2005-2006
Advanced User configuration includes the end user configuration and advanced configurations including:
SIP configuration, Codec selection, NAT Traversal Setting and other miscellaneous configuration.
Grandstream Networks, Inc. GXW-400x User Manual Page 19 of 32
Firmware 1.0.0.28 Last Updated: 1/2007

Grandstream Networks, Inc. GXW-400x User Manual Page 20 of 32
Firmware 1.0.0.28 Last Updated: 1/2007
TABLE 9: ADVANCED CONFIGURATION PAGE DEFINITIONS
Admin
Password
Administrator password. Only the administrator can configure the “Advanced Settings”
page. Password field is purposely left blank for security reasons after clicking update
and saved. The maximum password length is 25 characters.
Layer 3 QoS This field defines the layer 3 QoS parameter which can be the value used for IP
Precedence or Diff-Serv or MPLS. Default value is 48.
Layer 2 QoS Value used for layer 2 VLAN tag. Default setting is blank.
STUN Server IP address or Domain name of the STUN server.
Keep-alive
interval
This parameter specifies how often the GXW–400x sends a blank UDP packet to the
SIP server to keep the “hole” on the NAT open. Default is 20 seconds.
Firmware
Upgrade &
Provisioning
Enables GXW–400x to download firmware or configuration file through either the TFTP
or HTTP server.
Via TFTP Server This is the IP address of the configured TFTP server. If selected and it is non-zero or
not blank, the GXW–400x retrieves the new configuration file or new code image from
the specified TFTP server at boot time. After 5 attempts, the system will timeout and
then it will start the boot process using the existing code image in the Flash memory. If
a TFTP server is configured and a new code image is retrieved, the new downloaded
image is saved into the Flash memory.
Note: Please do NOT interrupt the TFTP upgrade process (especially the power supply)
as this will damage the device. Depending on the network environment this process
can take up to 15 or 20 minutes.
Via HTTP Server The URL for the HTTP server used for firmware upgrade and configuration via HTTP.
For example, ttp://provisioning.mycompany.com:6688/Grandstream/1.0.0.36
“:6688” is the specific TCP port where the HTTP server is listening; it can be omitted if
using default port 80.
Note: If Auto Upgrade is set to No, GXW–400x will only do HTTP download once at
boot up.
Automatic
Upgrade
Choose “Yes” to enable automatic upgrade and provisioning. In “Check for new
firmware every” field, enter the number of days to enable GXW–400x to check the
server for firmware upgrade or configuration in the defined period of days. When set to
No, GXW–400x will only do upgrade once at boot up. “Always check for New
Firmware.” Check New Firmware only when F/W pre/suffix changes”
Authenticate
Conf File
If set to Yes, config file is authenticated before acceptance. This protects the
configuration from an unauthorized change.
Firmware Key For firmware encryption. It should be 32 digit in Hexadecimal Representation. End
user should keep it blank.
Lock Keypad
Update
If set to “Yes”, the configuration update via keypad is disabled.
NTP server URI or IP address of the NTP (Network Time Protocol) server. Used by the phone to
synchronize the date and time.