Grandstream Networks GXW40 series User manual

GXW40XX User Manual www.grandstream.com
Firmware Version 1.0.5.10 [e-mail]
Grandstream Networks, Inc.
Analog IP Gateway GXW40XX
4, 8 or 24 FXS Ports
Models: 7898908277197 / 7898908277180

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Firmware 1.0.5.10 Last Updated: 01/2012
TABLE OF CONTENTS
GXW40XX User Manual
WELCOME....................................................................................................................................................4
GATEWAY GXW40XX OVERVIEW ..................................................................................................................4
SAFETY COMPLIANCE.....................................................................................................................................4
WARRANTY...................................................................................................................................................4
CONNECT YOUR GXW40XX GATEWAY...................................................................................................5
EQUIPMENT PACKAGING..............................................................................................................................................5
CONNECT THE GXW40XX..........................................................................................................................................5
GXW40XX FEATURES ................................................................................................................................9
SOFTWARE FEATURES OVERVIEW ...............................................................................................................................9
HARDWARE SPECIFICATION.......................................................................................................................................11
BASIC OPERATIONS................................................................................................................................12
UNDERSTANDING GXW VOICE PROMPTS..................................................................................................................12
PLACING A PHONE CALL............................................................................................................................................13
PHONE OR EXTENSION NUMBERS...................................................................................................................13
DIRECT IP CALLS.........................................................................................................................................13
CALL HOLD................................................................................................................................................................14
CALL WAITING ..........................................................................................................................................................14
CALL TRANSFER ........................................................................................................................................................14
BLIND TRANSFER....................................................................................................................................14
ATTENDED TRANSFER............................................................................................................................14
3-WAY CONFERENCING .............................................................................................................................................15
HUNTING GROUP .......................................................................................................................................................15
INTER-PORT CALLING ................................................................................................................................................16
PSTN PASS THROUGH/LIFE LINE ..............................................................................................................................17
SENDING AND RECEIVING FAX...................................................................................................................................17
SUPPORT RADIUS PROTOCOL...................................................................................................................................17
CALL FEATURES......................................................................................................................................18
CONFIGURATION GUIDE .........................................................................................................................19
CONFIGURING GXW40XX VIA VOICE PROMPT ........................................................................................................19
CONFIGURING GXW40XX WITH WEB BROWSER.................................................................................................19
ACCESS THE WEB CONFIGURATION MENU ................................................................................................................19
IMPORTANT SETTINGS................................................................................................................................................20
NAT SETTINGS ..........................................................................................................................................................20
DTMF METHODS.......................................................................................................................................................20
PREFERRED VOCODER (CODEC) .............................................................................................................................21
SAVING THE CONFIGURATION CHANGES ...................................................................................................................36
REBOOTING FROM REMOTE........................................................................................................................................36
CONFIGURATION THROUGH A CENTRAL SERVER .......................................................................................................36
SOFTWARE UPGRADE.............................................................................................................................38
CONFIGURATION FILE DOWNLOAD............................................................................................................................39
FIRMWARE AND CONFIGURATION FILE PREFIX AND POSTFIX ....................................................................................39
MANAGING FIRMWARE AND CONFIGURATION FILE DOWNLOAD...............................................................................39
RESTORE FACTORY DEFAULT SETTING..............................................................................................40

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TABLE OF FIGURES
GXW40XX User Manual
Figure 1: Diagram of GXW4004-8 and GXW4024 Back Panel ................................................... 5
Figure 2: 50 Pin Telco Connector:.................................................................................................. 6
Figure 3: Diagram of GXW4004-8 and GXW4024 Display Panel............................................... 7
TABLE OF TABLES
GXW40XX User Manual
Table 1: Definitions of the GXW Connectors ..............................................................................................................6
Table 2: Definitions of the GXW Display Panel ..........................................................................................................7
Table 3: GXW40XX Software Features.......................................................................................................................9
Table 4: Hardware Specification of GXW40XX series gateways..............................................................................11
Table 5: Definitions of the GXW Voice Prompts.......................................................................................................12
Table 6: Call Features Table (Star Code) ...................................................................................................................18
Table 7: Basic Settings...............................................................................................................................................21
Table 8: Status Page ...................................................................................................................................................23
Table 9: Advanced Settings........................................................................................................................................24
Table 10: FXS Ports Settings......................................................................................................................................28
Table 11: Profile settings............................................................................................................................................30
CONFIGURATION GUI INTERFACE EXAMPLES
GXW40XX User Manual
http://www.grandstream.com/products/gxw_series/gxw40xx/documents/gxw40xx_gui.zip
1. SCREENSHOT OF ADVANCED SETTINGS 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 PAGE

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WELCOME
Thank you for purcha sing the Grandstream GXW40XX Analog FXS IP Gateway. The GXW40XX offers
an easy to manag e, easy to configu re IP communi cations solution for any busine ss with virtual and/o r
branch locations. The GXW40XX supports popular voice codecs and is designed for full SIP compatibility
and interoperability with third party SIP providers, thus enabling you to fully leverage the benefits of VoIP
technology, integrate a t raditional phone system into a VoIP network, and efficie ntly manage
communication costs.
This manual will help you learn how to operate an d manage your GXW FXS Analog IP Gateway and
make the b est use of its many upgr aded features includin g simple and quick installation, multi-party
conferencing, and direct I P-IP Calling. This IP A nalog Gateway is very ea sy to mana ge and scalable,
specifically designed to be an easy to use and affordable VoIP solution for the small – medium business
or enterprise.
Gateway GXW40XX Overview
The new GXW40XX 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 a uto-configurable, remotely
manageable and scalable.
The GXW40XX features 4,8 or 24-port FXS interface for analog telephones, dual 10M/100Mbps network
ports with integrated router, PSTN life line in ca se of power failu re, and an RS232 se rial port (except
GXW4024) for ad ministration. In addition, it supp orts the option of 3 SIP Server profiles, caller ID for
various countries/regions, T.38 fax, flexible dialing plans, security protection (SIPS/TLS), comprehensive
voice codec including G.711 (a/u-law), G.723.1, G.726(16/24/32/48 bit rates), G.729A/B/E and iLBC.
Safety Compliance
The GXW40XX is com pliant with vari ous safety standards i ncluding FCC/CE. Its powe r adapter is
compliant with UL standard. Warning: use only the power a dapter included in the GXW40XX package.
Use of alternative power adapter may permanently damage the unit.
Warranty
Grandstream has a reseller agreement with ou r reseller customers. End users should contact the
company from whom the product was purchased, for replacement, repair or refund.
If you purcha sed the product directly from G randstream, contact your Grandstream Sales and Service
Representative for an RMA (Return Ma terials Authorization) number. Grandstream reserves the right to
change the warranty policy without prior notification.
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 G randstream GUI Interfaces. Please d ownload these examples
http://www.grandstream.com/products/gxw_series/gxw40xx/documents/gxw40xx_gui.zip for your
reference.
 This document is subject to change without notice. The latest electronic version of this user manual
is located at
http://www.grandstream.com/products/gxw_series/gxw40xx/documents/gxw40xx_usermanual_englis
h.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.

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CONNECT YOUR GXW40XX GATEWAY
Connecting the GXW40X X gateway i s easy. Before you be gin, please veri fy the cont ents of the
GXW40XX package.
EQUIPMENT PACKAGING
Unpack and check all accessories. Equipment includes:
 one device unit
 one RJ45 Ethernet cable
 one 12V universal power adapter
CONNECT THE GXW40XX
Follow these four (4) ste ps to conn ect your GXW 40XX gateway to the Internet and access the unit’s
configuration pages.
1. Connect standard touch-tone analog phones to the FXS ports.
2. Insert an RJ45 Ethernet cable into the WAN port of GXW400X and connect the other end to an
uplink port (a router or a modem, etc.) Note: If th e gateway is used in router mode, connect a PC
to the LAN p ort of GXW4 00X for initial configuration. In case of GXW4024, there i s only one
Ethernet port.
3. Plug the power adapter into the GXW40XX gateway into a power outlet.
Follow the instructions from the topic “Configuring GXW 400X with Web Browser” for initial configuration.
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/products/gxw_series/gxw40xx/documents/gxw40xx_gui.zip.
FIGURE 1: DIAGRAM OF GXW4004-8 AND GXW4024 BACK PANEL
LAN/WAN
RJ-45 Ethernet
Ports
FXS
Ports
Console
Connection
(PC
connection)
GXW 400x
PSTN
Line
Power
Supply
Reset

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LAN Port
TABLE 1: DEFINITIONS OF THE GXW CONNECTORS
LAN Connect the LAN port with an Ethernet cable to your PC.
WAN 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.
LINE When the unit loses power or un it became unregistered, FXS port 1 will be able to
make/receive calls from the PSTN line connected to this port.
FXS1
–
FXS24 FXS port to be connected to analog phones / fax machines.
Note: Once the GXW40xx is turned on and configured, the front display panel indicates the status of the
unit.
FIGURE 2: 50 PIN TELCO CONNECTOR:
Pin Signal Pin Signal
1 RING1 26 TIP1
2 RING2 27 TIP2
3 RING3 28 TIP3
4 RING4 29 TIP4
5 RING5 30 TIP5
6 RING6 31 TIP6
7 RING7 32 TIP7
8 RING8 33 TIP8
9 RING9 34 TIP9
10 RING10 35 TIP10
11 RING11 36 TIP11
12 RING12 37 TIP12
13 RING13 38 TIP13
14 RING14 39 TIP14
15 RING15 40 TIP15
GXW 4024
50 PIN Telco
Connector
FXS
Ports

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16 RING16 41 TIP16
17 RING17 42 TIP17
18 RING18 43 TIP18
19 RING19 44 TIP19
20 RING20 45 TIP20
21 RING21 46 TIP21
22 RING22 47 TIP22
23 RING23 48 TIP23
24 RING24 49 TIP24
25 50
FIGURE 3: DIAGRAM OF GXW4004-8 AND GXW4024 DISPLAY PANEL
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.
Console Turns ON when Console port is being used.
LAN LED Indicates LAN (or WAN) port activity
WAN LED Indicates PC (or LAN) port activity
LED 1
–
24 Indicate status of the respective FXS Ports on the back panel
Busy - ON (Solid Green)
Available - OFF
Slow blinking FXS LEDs indicates Voice Mail for that port.
FXS port
status
GXW4008
Display
LEDs
Display LEDs FXS port status
GXW4024

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NOTE:
 All LED lights display green when ON.
 Slow blinking of READY, WAN and LAN LE D together in dicates a firmwa re upgrade or
provisioning state.
 LED POWER, READY and WAN lights are ON when device is up and run ning and successfully
registered to the SIP Server.
 Slow blinking of READY LED indicates that d evice has not registered with any SIP Service
provider.

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GXW40XX FEATURES
The GXW4000 series is a next gen eration IP voice gat eway that is inte roperable and compatible with
leading IP-PBXs, Softswi tches and SIP platforms. The GXW4000 series FXS gateway is auto-
configurable, remotely manageable and scalable. The GXW4000 series gateways come in three models
- the GX W-4004,GXW-4008 and GXW4024, each offering superb voice quality, traditional teleph ony
functionality, easy d eployment, and 4,8 and 24 FXS ports respectively. Each mod el features flexible
dialing plans, integrated call routing to support a pure IP network call and an external power supply.
SOFTWARE FEATURES OVERVIEW
 4, 8 or 24 FXS ports
 Two RJ-45 ports (switched or routed) (one RJ-45 port in GXW4024)
 Multiple SIP accounts & profiles (4,8 / conf igurable through 2 profiles, or 24 accounts /
configurable through 3 profiles)
 Supports Voice Codecs:
G711(a/µ, Annex I & II), G723.1A, G726 (ADPCM with 16/24/32/40 bit rates), G729 A/B/E, iLBC
 T.38 Fax
 Comprehensive Dial Plan support for Outgoing calls.
 G.168 Echo Cancellation
 Voice Activation Detection (VAD), Comfort Noise Generation (CNG), a nd Packet Loss
Concealment (PLC)
 Supports PSTN/PBX analog telephone sets or analog trunks
TABLE 3: GXW40XX SOFTWARE FEATURES
GXW4004 GXW4008 GXW4024
Telephone Interfaces 4 FXS ports 8 FXS ports 24 FXS ports
SIP Provisioning 4 SIP accounts, 2 profiles 8 SIP accounts, 2 profiles 24 SIP accounts, 3 profiles
Network Interface Two (2) 10M/100 Mbps,
RJ-45 Two (2) 10M/100 Mbps, RJ- 45 One 10M/100 Mbps LAN, RJ-45
Number of
Concurrent Calls
(except when using
SRTP)
4 Concurrent Calls 8 Concurrent Calls 24 Concurrent Calls,
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-s witch to
G.711
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
Voice Activity Detection
(VAD) with CNG (comfort
noise generation) and PLC
(packet loss c oncealment),
AEC with NLP Packetized
Voice Protocol Unit
(supports RTP/RTCP)
G.168 compliant Echo
Cancellation, Adaptive
Jitter Buffer, Fax /Modem
detection & a uto-switch to
G.711
PSTN Fail-over PSTN failover port on
power failure PSTN failover port on power failure N/A
G.711 + Annex I (PLC), G.711 + Annex I (PLC), G.711 + Annex I (P LC),

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V
oice Compression Annex II (VAD/CNG
format) encoder and
decoder, G.723.1A,
G.726(ADPCM with
16/24/32/40 bit rates),
G.729A/B/E, iLBC
G.726 provides proprietary
VAD, CNG, and sig nal
power estimation, Voice
Play Out un it (reordering,
fixed and adaptive jitter
buffer, clock
synchronization), AGC
(automatic gain control),
Status output, Decoder
controlling via voice p acket
header
Annex II (VAD/CNG format)
encoder and decoder,
G.723.1A, G.726(ADPCM
with 16/24/32/40 bit rates),
G.729A/B/E, iLBC
G.726 provides proprietary
VAD, CNG, and signa l
power estimation, Voic e
Play Out unit (reordering,
fixed and adaptive jitter
buffer, clock
synchronization), AGC
(automatic gain control),
Status output, Decoder
controlling via voice packet
header
Annex II (VAD/CNG
format) encoder and
decoder, G.723.1,
G.726(ADPCM with
16/24/32/40 bit rates),
G.729A/B/E, iLBC
G.726 provides proprietary
VAD, CNG, and signa l
power estimation, Voice
Play Out unit (reordering,
fixed and a daptive 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 Yes, NAT Router or Switched Mode Yes, DHCP Client only
Fax over IP T.38 compliant Group 3
Fax Relay up to 14.4kpbs
and auto-switch to G.711
for Fax Pass-through,
Fax Datapump V.17, V.19,
V.27ter, V.29 for T.38 fax
relay
T.38 compliant Group 3 F ax
Relay up to 14.4kp bs and
auto-switch to G.711 for F ax
Pass-through,
Fax Datapump V.17, V.19,
V.27ter, V.29 for T.38 fax
relay
T.38 compliant Group 3
Fax Relay up to 14.4kpb s
and auto-switch to G.711
for Fax Pass-through,
Fax Datapump V.17, V.19,
V.27ter, V.29 for T.38 fax
relay
QoS Diffserv, TOS, 802.1 P/Q
VLAN tagging Diffserv, TOS, 802.1 P/Q VLAN tagging Diffserv, ToS, 802.1 P/Q VLAN tagging
Transport Protocol RTP/RTCP RTP/RTCP RTP/RTCP
DTMF Method In-audio, RFC2833, and/or
SIP Info In-audio, RFC2833, and/or SIP Info In-Audio, RFC2833, and/or SIP Info
IP Signaling SIP (RFC 3261) SIP (RFC 3261) SIP (RFC 3261)
Provisioning TFTP, HTTP, HTTPS TFTP, HTTP, HTTPS TFTP, HTTP, HTTPS
Control TLS/SIPS TLS/SIPS TLS/SIPS
Management Syslog support, HTTP and
Telnet access Syslog support, HTTP and Telnet access Syslog support, HTTP and Telnet access
Dial Plan Yes Yes Yes
UPnP Support Yes Yes N/A
Caller ID Bellcore Type 1 & 2, ET SI,
BT, NTT, and DTMF-based
CID
Bellcore Type 1 & 2, ET SI,
BT, NTT, and DT MF-based
CID
Bellcore Type 1 & 2, ET SI,
BT, NTT, and DTMF-based
CID
Polarity Reversal /
Wink Yes Yes Yes
EMC EN55022/EN55024 and
FCC part15 Class B EN55022/EN55024 and FCC part15 Class B EN55022/EN55024 and FCC part15 Class B

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HARDWARE SPECIFICATION
The hardware specifications of the GXW FXS series are detailed in Table 4.
TABLE 4: HARDWARE SPECIFICATION OF GXW40XX SERIES GATEWAYS
GXW4004 GXW4008 GXW4024
Ports 4 FXS Ports 8 FXS Ports 24 FXS Ports
Network interface 1 RJ45 for LAN, 10/100
Base-TX, Full Duplex
1 RJ45 for
WAN,10/100Base-TX,
Full Duplex
1 RJ45 for LAN, 10/100
Base-TX, Full Duplex
1 RJ45 for
WAN,10/100Base-TX, Full
Duplex
1 RJ45 for LAN, 10/100 Base-
TX, Full Duplex
PSTN Port PSTN fail-over port PSTN fail-over port n/a
Console DB9 Serial port DB9 Serial port n/a
Universal
Switching
Power Adaptor
Input: 100-240V AC,
50/60Hz, 0.3A Max
Output: 12V DC, 1.25A
UL certified
Input: 100-240V AC,
50/60Hz, 0.3A Max
Output: 12V DC, 1.25A
UL certified
Input: 100-240V AC, 50/60Hz
Output: 12V DC, 5.0A , UL
certified
Short Haul Loop 2REN: Up to 1km on 24
AWG wire
2REN: Up to 1km on 24
AWG wire
2REN: Up to 1km on 24 A WG
wire
Mounting Wall mount, Desktop Wall mount, Desktop Rack, Wall mount
Dimension 225mm (L) x 135mm (W)
x 35mm (H) 225mm (L) x 135mm (W) x 35mm (H) 445mm (L) x 269mm (W) x 44.5mm (H), or 1U
Weight 0.29 lbs (3.5 oz) 0.29 lbs (3.5 oz) 6.3 lbs (2.8 kg)
Temperature 32~104°F / 0~40°C 32~104°F / 0~40°C 32~104°F / 0~40°C
Humidity 10% - 90 % (non-
condensing) 10% - 90% (no n- condensing) 10% - 90% (non-condensing)
Safety UL UL UL
Compliance FCC, CE FCC, CE FCC, CE, C-Tick

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BASIC OPERATIONS
UNDERSTANDING GXW VOICE PROMPTS
GXW40XX has a built-in voice prompt menu for simple device 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
V
oice 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 – 05, 07,10 - 17, 47, 86 or 99 Menu option
01 “DHCP Mode”, “PPPoE
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
 iLBC
 G-726
 G-723
 G-729
10 “MAC Address” Announces the Mac address of the unit.
12 WAN Port Web Access Enter “9” to toggle between enabled and disabled
13 Firmware Server IP
Address
Announces current F irmware 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 firm ware 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” Enter the targ et IP address to make a d irect IP call, after dia l
tone. (See “Make a Direct IP Call”.)
71-78 Phone calls between
different ports of the same
GW 400x
Applies to GXW 4004/GXW4008. User c an make intern al calls
between different ports inside the same GW even without being
registered to S IP server. B y dialing *** and 7x user can reach
colleague connected to port “x”.
701-724 Phone calls between
different ports of the same
GW4024
Applies to GXW 4024. User can make inte rnal calls bet ween
different ports inside the same GW even without being registered
to SIP server. B y dialing *** and 7xx user can reach colleague
connected to port “xx”.
86 Voice Mail Number of voice mails
99 “RESET” Enter “9” to reboot the device; or

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Enter MAC address to restore factory default setting
(See Restore Factory Default Setting section)
“Invalid Entry” Automatically returns to Main Menu
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 di git sequences have kno wn lengths - 2 digits for menu option an d 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 A PHONE CALL
PHONE OR EXTENSION NUMBERS
1. Dial the number directly and wait for 4 seconds (To change the default value, modify the following
setting - “No Key Entry Timeout”)
or
2. Dial the number directly and press # (Use # as dial key” must be configured in web configuration).
Examples:
1. Dial a nu mber (e.g. (626 ) 666-7890), first ente r the prefix numb er (usually 1+ or inte rnational
code) followed by the pho ne number. Press # o r wait for 4 se conds. Che ck with you r VoIP
service provider for further details on prefix numbers.
DIRECT IP CALLS
Direct IP calling allows two parties, that is, a FXS Port with an analog phone and another VoIP Device, to
talk to each other in an ad hoc fashion without a SIP proxy.
Elements necessary to completing a Direct IP Call:
1. Both GXW40XX and other VoIP Device, have public IP addresses, or
2. Both GXW40XX and other VoIP Device are on the same LAN using private IP addresses, or
3. Both GXW40XX and other VoIP Device can be connected through a router using public or private
IP addresses (with necessary port forwarding or DMZ).
GXW40XX supports two ways to make Direct IP Calling:
Using IVR
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 the IP address using format ex. 192*168*0*160 after the dial tone.
Using Star Code
1. Pick up the analog phone then dial “*47”
2. Enter the target IP address using same format as above.
Note: NO dial tone will be played between step 1 and 2.
Destination ports can be specified by using “*” (encoding for “:”) followed by the port number.

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Examples:
a) If the target IP address is 192.168.0.160, the dialing convention is
*47 or Voice Prompt with option 47, then 192*168*0*160.
followed by pressing the “#” key if it is configured as a send key or wait 4 se conds. In this case,
the default destination port 5060 is used if no port is specified.
b) If the target IP address/port is 192.168.1.20:5062, then the dialing convention would be:
*47 or Voice Prompt with option 47, then 192*168*0*160*5062 followed by pressing the “#” key
if it is configured as a send key or wait for 4 seconds.
NOTE: When completing direct IP call, the “Use Random Port” should set to “NO”. You can not make
direct IP calls between FXS ports since they are using same IP.
CALL HOLD
Place a call on hold by pressing the “flash ” button on the analog phon e (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, use “hook flash” (toggle on-off hook quickly). You may drop a call using hook flash.
CALL WAITING
Call waiting tone (2 sh ort beeps) indicates an incoming call, if the call waiting feature is ena bled. Toggle
between incoming call and current call by pressing t he “flash” button. First call is placed on hold. 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:
3. Caller A presses FLASH on the analog phone to hear the dial tone.
4. Caller A dials *87 then dials caller C’s number, and then # (or wait for 4 seconds).
5. Caller A will hear the confirm tone. Then, A can hang up.
NOTE: “Enable Call Feature” must be set to “Yes” in web configuration page.
Caller A can place a call on hold and wait for one of three situations:
1. A quick confirmation tone (similar to call waiting t one) 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 bu sy tone followe d by a resto red call (on supported platforms only). This means the
transferee has received a 4xx response for the I NVITE and we will try to re cover 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 for dial tone.
2. Caller A then dials Caller C’s number followed by # (or wait for 4 seconds).

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3. If Caller C a nswers the call, Caller A and Call er C are in conve rsation. 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 u p, the GXW40XX will ring back user A to remind A
that B is still on the call. A can pick up the phone to resume conversation with B.
3-WAY CONFERENCING
The GXW40XX supports Bellcore style 3-way Conference.
Instructions for 3-way conference:
Assuming that call party A and B are in conversation. A (GXW40XX) wants to bring C in a conference:
1. A presses FLASH (on the analog phone, or Hook Flash for old model phones) to get a dial
tone.
2. A dials C’s number then # (or wait for 4 seconds).
3. If C answers the call, then A presses FLASH to bring B, C in the conference.
4. If C does not answer the call, A can press FLASH back to talk to B.
5. If A presses FLASH during conference, C will be dropped out.
6. If A hangs up, the conference will be terminated for all th ree parties when configuration
“Transfer on Conference Hangup” is set to “No”. If the conf iguration is set to “Yes”, A w ill
transfer B to C so that B and C can continue the conversation.
HUNTING GROUP
This feature allows the user to setup a singl e SIP account on the gateway and have the ability to use all
FXS ports to make/receive calls. Using this feature, all ports active in same Hunting Group will have the
same phone number and incoming calls will be distributed in a Linear or Circular manner among the ports
active in that Hunting Group. The number of hunting groups is limited by the number of ports each GXW
model has - i.e. each port can be its own Huntin g Group. The most practical and efficient way to use
Hunting Groups is to assign 2 or 3 ports to separate Hunting Groups.
One additional and popular way to use the Hunting Group feature is called “ multiplexed analog lines”. In
this configuration, a legacy PBX system with 8 FXO trunks can be connec ted to 8 GX W 4008 ports
configured as a Hunting Group. The GXW can be registered to a SIP se rver provider using only one
phone number. If the SIP service provider allows multiple calls to the same number, the GXW will allow 8
concurrent calls to the same SIP number. All office members can be reached remotely u sing the same
phone number in a round-robin fashion.
Example Configuration of a typical Hunting Group:
1. Configure the SIP accou nt from your VoIP Service Provider on FXS port 1 under FXS Ports
webpage.
2. Select Active under the Hunting Group drop box for FXS port 1.
3. For the remaining ports (say 2, 3 and 4) sele ct 1 for Hunting Group. Ports 2, 3 and 4 are now
active members of the hunting group associated with port 1.
This configuration will route all calls directed to F XS port 1 to ports 2, 3 and/or 4 in round robin fashi on
respectively if port 1 is busy or times out. You can configure the ring timeout on the Profile page.
Example configuration of a multiple Hunting Group:
FXS Port #1: SIP UserID and Authenticate ID entered, Hunting group set to "Active"

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FXS Port #2: SIP UserID and Authenticate ID left blank, Hunting Group set to "1"
FXS Port #3: SIP UserID and Authenticate ID left blank, Hunting Group set to "1"
FXS Port #4: SIP UserID and Authenticate ID entered, Hunting group set to "Active"
FXS Port #5: SIP UserID and Authenticate ID left blank, Hunting Group set to "4"
FXS Port #6: SIP UserID and Authenticate ID left blank, Hunting Group set to "4"
FXS Port #7: SIP UserID and Authenticate ID entered, Hunting group set to "Active"
FXS Port #8: SIP UserID and Authenticate ID left blank, Hunting Group set to "7"
…
FXS Port #24: SIP UserID and Authenticate ID left blank, Hunting Group set to "2"
Hunting Group 1 contains ports 1, 2, 3. Hunting Group 4 contains ports 4, 5, 6.
Hunting Group 7 contains ports 7, 8.
Please be aware, the choice of 1 for ports 2 and 3, the choice of 4 for ports 5 and 6, the choice 7 for port
8 is req uired to indicate that the SIP account tied to port marked as “Active” will be used for all
members of the same Hunting group. Needless to say, those members of the same Hunting group may
not be sequential ports. In following example ports 3, 5 and 7 tied to SIP Account configu red in Port #1
marked as “Active”, and ports 4,6,8 tied to SIP Ac count configured in Port #2 marked as “Active” as
well.
Example of not sequential configuration of a multiple Hunting Group:
FXS Port #1: SIP UserID and Authenticate ID entered, Hunting group set to "Active"
FXS Port #2: SIP UserID and Authenticate ID entered, Hunting Group set to "Active"
FXS Port #3: SIP UserID and Authenticate ID left blank, Hunting Group set to "1"
FXS Port #4: SIP UserID and Authenticate ID left blank, Hunting group set to "2"
FXS Port #5: SIP UserID and Authenticate ID left blank, Hunting Group set to "1"
FXS Port #6: SIP UserID and Authenticate ID left blank, Hunting Group set to "2"
FXS Port #7: SIP UserID and Authenticate ID left blank, Hunting group set to "1"
FXS Port #8: SIP UserID and Authenticate ID left blank, Hunting Group set to "2"
…
FXS Port #24: SIP UserID and Authenticate ID left blank, Hunting Group set to "2"
Note: A single call directed to the SIP account will NOT result in all ports ringi ng at the same time. They
will ring in the hunting group only. This feature is applicable to incoming calls only.
There are two types of hunting groups, Linear and Circular. Linear style will sort the call to the lowest-
numbered available line, this is also called “serial hunting”. Circular style will distribute the calls "round-
robin". If a call is assigned to line 1, the next call goes to 2 and the next to 3. The succession throughout
each of the lines continues even if one of the previous lines becomes available. When the end of the hunt
group is rea ched, the hunt ing starts over at the firs t line. Lines a re skipped if they are still busy on a
previous call. These two hunting styles can be configured from the Profile_x page.
INTER-PORT CALLING
In some cases a user may want to make phone calls between the phones connected to multiple ports of
the same gateway when it is used as a stand alone unit, without the use of a SIP server. This feature will
also be applicable when the gateway is used with Hunting Groups and is registered to SIP serve r only
with one master number. In such cases users still wi ll be able to make inte r-port calls by using the IVR
feature.

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For example on the GX4004 and GXW4008 the user connected to port 1 can reach the user connected to
port 3 by dialing *** and 73. Digit 7 indicate d using inter-port calling feature, digit 3 indicat es the port
number which should be reached. At th e same manner the user connected to port 4 can re ach the user
connected to port 8 by dialing *** and 78.
On the GXW4024 inter-port calling is achieved by dialing *** and 7 plus two extra digits corresp onding to
the port number. For example the user connected to port 1 can be reached by dialing *** and 70 1; the
user connected to port 24 can be reached by dialing *** 724.
PSTN PASS THROUGH/LIFE LINE
This feature is only applicable to GXW4004 and GXW4008 models. The RJ-11 line jack on th e
GXW400X side connected to a legacy PSTN line, fu nctions as a pass throu gh jack when the GXW400X
loses power or becomes unregistered. In this case, analog phone connected to FXS port 1 will be directly
connected to RJ-11 jack marked as LINE. The pa ss through/life line mode enables the user to use the
analog phone for PSTN calls directly without using an access code.
SENDING AND RECEIVING FAX
GXW40XX supports fax i n two m odes: 1) T.38 (Fax over IP) a nd 2) Fax P ass through. T.38 i s the
preferred method because it is more re liable and works well in m ost network con ditions. If the service
provider supports T.38, please use this method by se lecting T.38 as fax mode (default). If the service
provider does not support T.38, pass-through mode may be used. If you have problems with sending or
receiving Fax, toggle the Fax Tone Detection Mode setting.
SUPPORT RADIUS PROTOCOL
GXW40XX supports RADIUS for au thentication, authorization and billing purposes. Primary an d
secondary RADIUS server configurations are available to provid e redundancy to this feature. In ca se
Primary Radius server becomes unusable, RADIUS requests will be automatically sent to the second ary
server. When at least one RADUIS server was configured, the device will allow users to make phone calls
only after authorization from RADIUS server has been received. CDR (Call Detail Record) is also sent to
the RADIUS server for billing purp oses. RAIDUS server can send requests to terminate calls when run
out of pre-paid credit.
The GXW400x will be able to work in VoIP b illing environment using redundant double server
configuration. User will be able to configure pri mary and seco ndary RADUIS server IP Ad dresses or
FQDNs. Once at least one RADUIS server was configured, the device will allow users to make phone
calls only after pe rmission from RADIUS server has been received. In ca se Primary Radius server
becomes unusable, secondary will take role of p rimary and will manage credit recourses in the network.
Imbedded RADIUS client also supports request generated by Radius server to terminate calls when run out of
pre-paid credit.

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CALL FEATURES
GXW40XX supports the traditional te lephony features available in a PBX as well as additional advanced
telephony features.
TABLE 6: CALL FEATURES TABLE (STAR CODE)
Key Call Features
*02 Forcing a Codec (per call) *027110 (PCMU), *027111 (PCMA), *02723 (G72 3), *02729
(G729), *0272616 (G726-r16), *0272624 (G724-r24), *0272632 (G726-r32), *0272640 (G726-
r40), *027201 (iLBC)
*03 Disable LEC (pe call) Dial “*03” + ” number ”. No dial tone is played in the middle.
*16 Enable SRTP
*17 Disable SRTP
*30 Block CallerID (for all-config change)
*31 Send CallerID (for all-config change)
*67 Block CallerID (per call)
*82 Send CallerID (per call)
*47 Direct IP Calling. Dial “*47” + “IP address”. No dial tone will be played in the middle. Detail see
Direct IP Calling section on page 12.
*50 Disable Call Waiting (for all-config change)
*51 Enable Call Waiting (for all-config change)
*69 Call Return Service: Dial *69 an d the pho ne will dial the last inco ming phone number
received.
*70 Disable Call Waiting (Per Call)
*71 Enable Call Waiting (Per Call)
*72 Unconditional Call Forward: Dial “*72” and then 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.
*74 Enable Paging Call: Dial “*74” and then the destination phone number you want to activate in
Paging mode.
*78 Enable Do Not Disturb (DND): When enabled all incoming calls will be rejected.
*79 Disable Do Not Disturb (DND): When disabled, incoming calls will be accepted.
*87 Blind Transfer
*90 Busy Call Forward: Dial “*90” and then 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” and the n the for warding number fol lowed 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 ne w incoming call. Also used to
switch to a new channel for a new call.
# Pressing pound sign will serve as Re-Dial key.

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CONFIGURATION GUIDE
CONFIGURING GXW40XX VIA VOICE PROMPT
DHCP MODE
Select voice menu option 01 to enable GXW40XX to use DHCP.
STATIC IP MODE
Select voice menu option 01 to enable GXW40XX to use STATIC IP mode, then use option 02, 03, 04, 05
to set up IP address, Subnet Mask, Gateway and DNS server respectively.
FIRMWARE SERVER IP ADDRESS
Select voice menu option 13 to configure the IP address of the firmware server.
CONFIGURATION SERVER IP ADDRESS
Select voice menu option 14 to configure the IP address of the configuration server.
UPGRADE PROTOCOL
Select voice menu option 15 to choose firmware an d configuration upgrade protocol. User can choose
between TFTP and HTTP.
FIRMWARE UPGRADE MODE
Select voice menu option 17 to choose firmware upgrade mode among the following three options:
1) always check, 2) check when pre/suffix changes, and 3) never upgrade
WAN PORT WEB ACCESS (Note: This option is not present on GXW4024 gateway)
Select voice menu option 12 to enable WAN Port Wed Access of the device configuration pages.
CONFIGURING GXW40XX WITH WEB BROWSER
The GXW40XX series gateway has an embedded Web server that allo ws users to configure the
GXW40XX through a web browser.
ACCESS THE WEB CONFIGURATION MENU
The GXW40XX HTML configuration menu can be accessed via LAN or WAN port:
From the LAN port (For GXW4004/8 only)::
1. Directly connect a computer to the LAN port.
2. In Windows, open a ‘Command Prompt’ window
3. Type in “ipconfig /release”, the IP address etc. becomes 0.
4. Type in “ipconfig /renew”, the computer gets an IP address in 192.168.2.x segment by default
5. Open a web browser, type in the default gateway IP address. http://192.168.2.1. You will see the
login page of the device.
From the WAN port (For GXW4004/8 only):
The WAN port HTML configuration option is di sabled by defa ult from fact ory. To acce ss the HTML
configuration menu from the WAN port:
1. Follow table 4 to find the WAN side IP address.
2. Open a we b browser, type in t he WAN side IP addre ss – for e xample: http://GXW40XX -IP-
Address (the GXW40XX IP-Address is the WAN IP address for the GXW40XX).

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NOTE:
 WAN side HTTP access is disabled by default for security reasons. You can enable HTTP access on
the configuration page by setting “WAN side HTTP access” to be YES.
 Initial access to the configuration pages is always from the LAN port. The instructions are listed above.
 The IVR announces 12 digits IP address, you need to strip out the leading “0” in the IP address. For
ex. IP address: 192.168.001.014, you need to type in http://192.168.1.14 in the web browser.
Once the HTTP request is entered and sent from a web browser, the user will see a log-in screen. There are
two default passwords for the login page:
User Level: Password: Web pages allowed:
End User Level 123 Only Status and Basic Settings
Administrator Level Admin Browse all pages
The password is case sensitive with maximum length of 25 characters. The factory default password for End
User and administrator is “123” and “admin” respectively. Only an administrator can access the “ADVANCED
SETTING”, “Profile 1”, “Profile 2” and “FXS PORTs” configuration pages. Please reference the GUI pages
using the following link:
http://www.grandstream.com/products/gxw_series/gxw40xx/documents/gxw40xx_gui.zip .
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 FQ DN) 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)
It really depe nds on your network settings, so set th is parameter to Yes or No, whichever works.
Generally if you have multiple IP devices under the same network, it should be set to Yes. If using a
Public IP address, set this parameter to No.
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
You can enable set priority of DTMF methods according to your preference, from Priority 1 to 3. This
setting should be based on your server DTMF setting.