Grandstream Networks HandyTone-502 User manual

Grandstream Networks, Inc.
HandyTone-502
Dual FXS Port
Analog Telephone Adaptor
HT–502 User Manual www.grandstream.com
Firmware Version 1.0.0.29 [e-mail]

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TABLE OF CONTENTS
HT–502 User Manual
WELCOME.................................................................................................................................................... 4
Safety Compliances ...................................................................................................................4
Warranty....................................................................................................................................4
CONFIGURE YOUR HT–502 ....................................................................................................................... 5
EQUIPMENT PACKAGING............................................................................................................................... 5
CONNECT YOUR ATA .................................................................................................................................. 5
CONFIGURE YOUR ATA ............................................................................................................................... 6
Five easy steps to Configure the HT–502 .................................................................................6
PRODUCT OVERVIEW ................................................................................................................................7
KEY FEATURES............................................................................................................................................ 7
BASIC OPERATIONS .................................................................................................................................. 9
BECOME FAMILIAR WITH VOICE PROMPT ....................................................................................................... 9
PLACING A PHONE CALL............................................................................................................................. 10
Phone or Extension Numbers..................................................................................................10
Direct IP Calls ........................................................................................................................10
Call Hold.................................................................................................................................11
Call Waiting ............................................................................................................................11
Call Transfer ...........................................................................................................................11
3-Way Conferencing................................................................................................................12
CALL FEATURES ...................................................................................................................................... 13
T.38 FAX................................................................................................................................................... 13
CONFIGURATION GUIDE ......................................................................................................................... 14
CONFIGURING HT–502 THROUGH VOICE PROMPT....................................................................................... 14
CONFIGURING HT–502 WITH WEB BROWSER ..................................................................................... 15
ACCESS THE WEB CONFIGURATION MENU .................................................................................................. 15
END USER CONFIGURATION ....................................................................................................................... 16
ADVANCED USER CONFIGURATION ............................................................................................................. 18
SAVING THE CONFIGURATION CHANGES ..................................................................................................... 24
Rebooting the HT–502 from Remote.......................................................................................24
SOFTWARE CONFIGURATION ................................................................................................................ 25
FIRMWARE UPGRADE THROUGH TFTP/HTTP ............................................................................................. 25
IVR Method .............................................................................................................................25
Upgrade through HTTP ..........................................................................................................25
Upgrade through TFTP...........................................................................................................25
No Local TFTP Server ............................................................................................................26
Firmware and Configuration File Prefix and Postfix.............................................................26
Managing Firmware and Configuration File Download........................................................26
RESTORE FACTORY DEFAULT SETTING.............................................................................................. 27
FACTORY RESET................................................................................................................................... 27
GLOSSARY OF TERMS ............................................................................................................................ 28

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TABLE OF FIGURES
HT–502 User Manual
FIGURE 1: CONNECTING THE HT–502 ............................................................................................................. 5
FIGURE 2: CONFIGURING THE HT–502 ............................................................................................................ 6
FIGURE 3: LOG-IN WEB CONFIGURATION PAGE OF THE HT–502 .................................................................... 16
FIGURE 4: SCREENSHOT OF ADVANCED CONFIGURATION PAGE ...................................................................... 18
FIGURE 5: SAVING CONFIGURATION CHANGES SCREENSHOT .......................................................................... 24
TABLE OF TABLES
HT–502 User Manual
TABLE 1: DEFINITIONS OF THE HT–502 CONNECTORS ..................................................................................... 5
TABLE 2: DEFINITIONS OF THE HT-502 LEDS.................................................................................................. 6
TABLE 3: HT–502 TECHNICAL SPECIFICATIONS ............................................................................................... 8
TABLE 4: HT –502 HARDWARE SPECIFICATIONS ............................................................................................. 9
TABLE 5: HT–502 IVR MENU DEFINITIONS ...................................................................................................... 9
TABLE 6: HT–502 CALL FEATURE DEFINITIONS ............................................................................................. 13
TABLE 7: HT–502 BASIC CONFIGURATION SETTINGS DEFINITIONS ................................................................. 17
TABLE 8: HT–502 DEVICE STATUS PAGE DEFINITIONS................................................................................... 18
TABLE 9: HT–502 ADVANCED CONFIGURATION PAGE DEFINITIONS ................................................................ 19
TABLE 10: HT–502 INDIVIDUAL ACCOUNT SETTINGS DEFINITIONS .................................................................. 21
CONFIGURATION GUI INTERFACE EXAMPLES
HT–502 User Manual
(http://www.grandstream.com/user_manuals/GUI/GUI_HT502.rar)
1. SCREENSHOT OF ADVANCED USER CONFIGURATION PAGE
2. SCREENSHOT OF BASIC SETTINGS CONFIGURATION PAGE
3. SCREENSHOT OF FXS PORT 1CONFIGURATION LOGIN PAGE
4. SCREENSHOT OF FXS PORT 2CONFIGURATION PAGE
5. SCREENSHOT OF STATUS CONFIGURATION LOGIN PAGE

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WELCOME
Thank you for purchasing Grandstream’s HT–502, the affordable, feature rich Analog Telephone Adaptor.
Grandstream HandyTone-502 is a new addition to the popular HandyTone ATA product family. It features
the rich audio quality, a broad range of voice codecs, and functionality of the HT–502, including two (2)
FXS ports each with independent SIP accounts and
This manual will help you learn how to operate and manage your HandyTone-502 Analog Telephone
Adaptor and make the best use of its many upgraded features including simple and quick installation, 3-
way conferencing, and direct IP-IP Calling. This HT–502 is very easy to manage and configure, and ius
specifically designed to be an easy to use and affordable VoIP solution for both the residential user and
the tele-worker.
SAFETY COMPLIANCES
The HT–502 phone complies with FCC/CE and various safety standards. The HT–502 power adaptor is
compliant with UL standard. Only use the universal power adapter provided with the HT–502 package.
The manufacturer’s warranty does not cover damages to the phone caused by unsupported power
adaptors.
WARRANTY
If you purchased your HT–502 from a reseller, please contact the company where you purchased your
phone 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
before you return the product. Grandstream reserves the right to remedy 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. Please do not use a different power adaptor with the HT–502 as it may cause damage to the
products and void the manufacturer warranty.
•This document is contains links to Grandstream GUI Interfaces. Please download these examples
http://www.grandstream.com/user_manuals/GUI/GUI_HT502.rar for your reference.
•This document is subject to change without notice. The latest electronic version of this user manual
is available for download @:http://www.grandstream.com/user_manuals/HT-502.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 HT–502
Configuring your HT–502 and connecting the unit to the VoIP network is very simple. The HT–502 is easy
to configure using the embedded GUI pages and the following five (5) steps outlined below. Before you
begin, please verify the contents of the HT–502 package. Download examples of the GUI Interfaces from:
http://www.grandstream.com/user_manuals/GUI/GUI_HT502.rar.
EQUIPMENT PACKAGING
Unpack and check all accessories. Equipment included in the package:
•one 12V universal power adapter
•one Ethernet cable
•one device unit
CONNECT YOUR ATA
First, familiarize yourself with the features of the HT–502. The HT–502 has two FXS ports. Each FXS
port can have a separate SIP account. This is a key feature of HT–502. Both ports can make calls
concurrently.
FIGURE 1: CONNECTING THE HT–502
LED Buttons
(green/red)
HT-502
Front View
RJ-45 Ports
10/100 Mbps
RJ-11 FXS Ports
(Phone)
Reset
+5V/1200mA
HT-502
Back View
TABLE 1: DEFINITIONS OF THE HT–502 CONNECTORS
Power Cable Connect your PC to the LAN to find IP address from your Router/DHCP Server.
WAN Port (RJ-45) Connect to the internal LAN network or router.
LAN Port (RJ-45) Connect the LAN port with an Ethernet cable to your modem Ethernet port.
RESET Factory Reset button. Press for 7 seconds to reset factory default settings.
PHONE1 (RJ-11) FXS port to be connected to analog phones.
PHONE2 (RJ-11) FXS port to be connected to analog phones.
There are five (5) LED buttons that help you manage the status of your HandyTone.
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TABLE 2: DEFINITIONS OF THE HT-502 LEDS
Power LED Indicates Power. Remains ON when Power is connected and turned ON.
WAN LED Indicates LAN (or WAN) port activity.
LAN LED Indicates PC (or LAN) port activity.
PHONE1 /
PHONE2 LED
Indicate status of the respective FXS Ports-PHONE1 / PHONE2 on the back
panel
Busy - ON (Solid Green)
Available - OFF
NOTE: All LEDs display green when ON.
CONFIGURE YOUR ATA
The HT–502 is easy to configure using the embedded GUI pages and the following five (5) steps.
FIVE EASY STEPS TO CONFIGURE THE HT–502
1. Connect a standard touch-tone analog telephone (or fax machine) to first FXS port.
2. Connect another standard touch-tone analog telephone (or fax machine) to second FXS port.
3. Insert the Ethernet cable into the WAN port of HT–502 and connect the other end of the Ethernet
cable to an uplink port (a router or a modem, etc.)
4. Connect a PC to the LAN port of HT–502.
5. Insert the power adapter into the HT–502 and connect it to a wall outlet.
FIGURE 2: CONFIGURING THE HT–502
Internet ADSL/Cable
M
ode
m Eth
e
rn
e
t
WAN
LAN
FXS
F
Cordless Phone
Analog Phone
FXS
F
Cordless Phone
Analog Phone
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PRODUCT OVERVIEW
The new HT–502 has a new sleek compact design and offers superb audio quality, rich feature
functionality, security protection, and is easy to configure. The HT–502 features dual FXS interface for
The HT–502 is a full feature voice and fax-over IP device that offers a high-level of integration including
dual 10M/100Mbps network ports with integrated router, NAT, DHCP server, dual port FXS telephone
gateway, market-leading sound quality, rich functionalities, and a compact and lightweight design. The
HT–502 fully compatible with SIP industry standard and can interoperate with many other SIP compliant
devices and software on the market. Moreover, it supports comprehensive voice codecs including G.711
(a/µ-law), G.723.1, G.726, G.728, G.729A/B/E and iLBC.
KEY FEATURES
Ethernet
Ports DHCP FXS Port
PSTN
Pass –
through
Voice Mail
Indicator Voice Codec Remote Configuration
2 RJ-45 (LAN) Server/
Client 2 No Yes
iLBC, T.38,
G.711, G.723,
G.726, G.728,
G.729A/B/E
TFTP/HTTP

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TABLE3: HT–502 TECHNICAL SPECIFICATIONS
HT–502 Analog Telephone Adaptor
Telephone Interfaces 2 FXS ports, 2 SIP accounts
Network Interface Two (2) 10M/100 Mbps, RJ-45
LED Indicators Power, WAN, LAN, PHONE1 and PHONE2
Reset Button Factory Reset button.
Voice over Packet
Capabilities
Voice Activity Detection (VAD) with CNG (comfort noise generation) and
PLC (packet loss concealment), Dynamic Jitter Buffer,
Modem detection & auto-switch to G.711,
Packetized Voice Protocol Unit (supports RTP/RTCP and AAL2 protocol),
G.168 compliant Echo Cancellation, LEC (line echo cancellation) with NLP
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
Support Layer 2 (802.1Q, VLAN, 802.1p) and Layer 3 QoS (Tos, DiffSery,
MPLS)
Auto/manual provisioning system
Power Output: 12VDC / Input: 100–240 VAC/50-60 Hz
Environmental Operational: 32o–104oF or 0o–40oC
Storage: 10o–130oF / Humidity: 10–90% Non-condensing
Dimensions
(H x W x D)
Short and long haul REN3: Up to150 ft on 24 AWG line
Call Handling
Features
Caller ID display or block, Call waiting caller ID, Call waiting/flash, Call
transfer, hold, forward, mute, 3-way conferencing
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

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TABLE 4: HT –502 HARDWARE SPECIFICATIONS
LAN Interface 2 x RJ45 10/100Mbps (integrated router)
LED 5 LEDs (GREEN)
Universal
Switching
Power Adaptor
Input: 100-240V AC, 50/60Hz, 0.5A Max
Output: 12V DC, 1.25A
UL certified
Dimension
Weight
Temperature 32~104°F / 0~40°C
Humidity 10% - 90% (non-condensing)
Compliance FCC, CE
BASIC OPERATIONS
BECOME FAMILIAR WITH VOICE PROMPT
HT–502 stores a voice prompt menu (Interactive Voice Response or IVR) for quick browsing and simple
configuration. The IVR menu and the LED button work with any of the FXS port. To enter the IVR menu,
pick up the handset and dial “***”.
TABLE 5: HT–502 IVR MENU DEFINITIONS
Menu Voice Prompt Options
Main Menu “Enter a Menu Option” Press “*” for the next menu option
Press “#” to return to the main menu
Enter 01-06, 47, 86, 99 menu options
01 “DHCP Mode”,
“Static IP Mode”
Press “9” to toggle the selection
If using “Static IP Mode”, configure the IP address
information using menus 02 to 05.
If using “Dynamic IP Mode”, all IP address information
comes from the DHCP server automatically after reboot.
02 “IP Address “ + IP address The current WAN IP address is announced
If using “Static IP Mode”, enter 12 digit new IP address.
03 “Subnet “ + IP address Same as menu 02
04 “Gateway “ + IP address Same as menu 02
05 “DNS Server “ + IP address Same as menu 02
07 Preferred Vocoder Press “9” to move to the next selection in the list:
•PCM U / PCM A
•G-723
•G-729A/B/E
•G-726-32
•G728
•iLBC

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10 “MAC Address” Announces the Mac address of the unit.
12 WAN Port Web Access Press “9” to toggle between enable / 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.
Press “9” to toggle between TFTP / HTTP
16 Firmware Version Firmware version information.
17 Firmware Upgrade Firmware upgrade mode. Press “9” to toggle among the
following three options:
- always check
- check when pre/suffix changes
- never upgrade
47 “Direct IP Calling” Enter a 12 digit IP address to make a direct IP call, after
dial tone. (See “Make a Direct IP Call”.)
99 “RESET” Press “9” to reboot the device. See p. 27 for factory reset.
“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 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 A PHONE CALL
PHONE OR EXTENSION NUMBERS
1. Dial the number directly and wait for 4 seconds (Default “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 an extension directly on the same proxy, (e.g. 1008), and then press the # or wait for 4 seconds.
2. Dial an outside number (e.g. [phone]), first enter the prefix number (usually 1+ or international
code) followed by the phone number. Press # or wait for 4 seconds. Check with your 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.

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Elements necessary to completing a Direct IP Call:
1. Both HT–502 and other VoIP Device, have public IP addresses, or
2. Both HT–502 and other VoIP Device are on the same LAN using private IP addresses, or
3. Both HT–502 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.
Examples:
a) If the target IP address is 192.168.0.160, enter the 12 digit IP address (e.g. 1921680160) after
the voice prompt followed by the “#” key or wait for 4 seconds. 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, enter the 12 digit IP address + *45062 (e.g.
1921680160*45062) after the voice prompt followed by the “#” 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 FXS1 to FXS2 since they are using same IP.
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, use “hook flash” (toggle on-off hook quickly). You may drop a call using hook flash.
CALL WAITING
Call waiting tone (3 short beeps) indicates an incoming call, if the call waiting feature is enabled. Toggle
between incoming call and current call by pressing the “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:
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.

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Caller A can place a call on hold 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 for 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 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
Bellcore Style 3-way Conference
The HT–502 supports Bellcore Style 3-way Conference only.
Directions for using 3-Way Conferencing:
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.

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CALL FEATURES
The HT–502 supports all the traditional and advanced telephony features.
TABLE 6: HT–502 CALL FEATURE DEFINITIONS
Key Call Features
*30 Block Caller ID (for all subsequent calls)
*31 Send Caller ID (for all subsequent calls)
*50 Disable Call Waiting (for all subsequent calls)
*51 Enable Call Waiting (for all subsequent calls)
*67 Block Caller ID (per call)
*70 Disable Call Waiting (per call)
*71 Enable Call Waiting (per call)
*72 Unconditional Call Forward. Dial “*72”, wait for dial tone. Dial the forward number and
“#” for a dial tone, then hang up.
*73 Cancel Unconditional Call Forward. To cancel “Unconditional Call Forward”, dial
“*73”, wait for dial tone, then hang up.
*82 Send Caller ID (per call)
*87 Blind Transfer
*90 Busy Call Forward. Dial “*90” , wait for dial tone. Then dial the forward number and “#”
for a dial tone, then hang up.
*91 Cancel Busy Call Forward. To cancel “Busy Call Forward”, dial “*91”, wait for dial tone,
then hang up.
*92 Delayed Call Forward. Dial “*92”, wait for dial tone. Then dial the forward number and
“#” for a dial tone, then hang up.
*93 Cancel Delayed Call Forward. To cancel Delayed Call Forward, dial “*93”, wait for dial
tone, then hang up.
Flash/Hook Toggles between active call and incoming call (call waiting tone). If not in conversation,
flash/hook will switch to a new channel for a new call.
T.38 FAX
HT–502 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.
To send or receive faxes in fax pass through mode, users must select all the Preferred Codecs to be
PCMU/PCMA (G.711-u/a).

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CONFIGURATION GUIDE
CONFIGURING HT–502 THROUGH VOICE PROMPT
DHCP MODE:Select voice menu option 01 to enable HT–502 to use DHCP.
STATIC IP MODE:Select voice menu option 01 to enable HT–502 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 and 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:Select voice menu option 12 to enable WAN Port Wed Access of the device
configuration pages.

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CONFIGURING HT–502 WITH WEB BROWSER
HT–502 has an embedded Web server that will respond to HTTP GET/POST requests. It also has
embedded HTML pages that allow users to configure the HT–502 through a Web browser such as
Microsoft’s IE and AOL’s Netscape.
ACCESS THE WEB CONFIGURATION MENU
The HT–502 HTML configuration menu can be accessed via LAN or WAN port:
From the LAN port:
1. Directly connect a computer to the LAN port.
2. Open a command window on the computer
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:
The WAN port HTML configuration option is disabled by default from factory. To access the HTML
configuration menu from the WAN port:
1. Enable the “WAN Port Web Access” option via IVR option 12.
2. Find the WAN IP address of the HT–502 using voice prompt menu option 02.
3. Access the HT–502 Web Configuration page by the following URI via WAN port:
http://HandyTone-IP-Address (the HT IP-Address is the WAN IP address for the HT–502).
NOTE: If using a web browser to enter the configuration page, strip the leading “0”s because the browser
will parse in octet. (i.e. if the IP address is: 192.168.001.014, please type in: 192.168.1.14).

END USER CONFIGURATION
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
Only an administrator can access the “ADVANCED SETTING” configuration page.
FIGURE 3: SCREENSHOT OF CONFIGURATION LOG-IN PAGE
NOTE: If you cannot log into the configuration page by using default password, please check with the
VoIP service provider. The service provider may have provisioned and configured the device for you. The
Basic Configuration Page is the first web GUI the user will see.
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TABLE 7: HT–502 BASIC CONFIGURATION SETTINGS 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.
Telnet Server Default is set to YES.
IP Address There are two modes to operate the HT–502:
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 HT–502 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 HT–502 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
Language Languages supported with voice prompt
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 HT–502 .
Reply to ICMP on
WAN port
If set to “Yes”, the HT–502 will respond to the PING command from other
computers, but it also is vulnerable to the DOS attack. Default is No.
WAN side
HTTP/Telnet
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.
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
HT–502 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, end users also have access to the Device Status
page.
TABLE 8: HT–502 DEVICE 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 HT–502.
Product Model Contains the product model info.
Software Version Program: This is the main software release. Boot and Loader are seldom
changed.
System Up Time Shows system up time since the last reboot.
PPPoE Link Up Indicates whether the PPPoE connection is up if the HT–496is connected
to DSL modem.
NAT Indicates the type of NAT the HT–496 is connected to via its WAN port.
Based on STUN protocol.
Port Indicates whether the different FXS Ports are registered to the SIP
server(s).
ADVANCED USER CONFIGURATION
Log-in to the advanced user configuration page the same way as for the basic configuration page. The
password is case sensitive and the factory default password for Advanced User is “admin”.
Advanced User configuration includes the end user configuration and the advanced configurations
including: a) SIP configuration, b) Codec selection, c) NAT Traversal Setting and d) other miscellaneous
configuration. Following is a snap shot of the advanced configuration page.
FIGURE 4: SCREENSHOT OF ADVANCED USER CONFIGURATION LOG-IN PAGE
Grandstream Device Configuration
Password
Login
All Rights Reserved Grandstream Networks, Inc. 2005-2006
Each FXS SIP account has its own configuration page. Their configurations are identical.
Grandstream Networks, Inc. HT-502 User Manual Page 18 of 31
Firmware 1.0.0.29 Last Updated: 01/2007

Grandstream Networks, Inc. HT-502 User Manual Page 19 of 31
Firmware 1.0.0.29 Last Updated: 01/2007
TABLE 9: HT–502 ADVANCED CONFIGURATION PAGE DEFINITIONS
Admin Password This contains the password to access the Advanced Web Configuration page.
This field is case sensitive.
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 HT–502 sends a blank UDP packet to
the SIP server in order to keep the “hole” on the NAT open. Default is 20
seconds. Minimum value is 20 seconds.
Firmware Upgrade
and Provisioning
Enables HT–502 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 HT–502 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 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, HT–502 will only do HTTP download once
at boot up.
Firmware Server Path IP address or domain name of firmware server.
Config Server Path IP address or domain name of configuration server.
Firmware File Prefix Default is blank. If configured, HT–502 will request firmware file with the prefix.
This setting is useful for ITSPs. End user should keep it blank.
Firmware File Postfix Default is blank. End user should keep it blank.
Config File Prefix Default is blank. End user should keep it blank.
Config File Postfix Default is blank. End user should keep it blank.
Automatic Upgrade Default is “NO”.
When set to No, HT–502 will only do upgrade once at boot up. “Check every
day “, ” Check every week”, “Always check for New Firmware at Boot up.” “
Check New Firmware only when F/W pre/suffix changes”

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Firmware 1.0.0.29 Last Updated: 01/2007
Firmware Key Used for firmware encryption. Should be 32 digit in Hexadecimal
Representation. End user should keep it blank.
Authenticate Conf
File
If set to Yes, config file is authenticated before acceptance. This protects the
configuration from an unauthorized change.
Firmware Key Used for firmware encryption. 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.
Syslog Server The IP address or URL of System log server. This feature is especially useful
for the ITSP (Internet Telephone Service Provider)
Syslog Level Select the HT–502 to report the log level. Default is NONE. The level is one of
DEBUG, INFO, WARNING or ERROR. Syslog messages are sent based on
the following events:
1. product model/version on boot up (INFO level)
2. NAT related info (INFO level)
3. sent or received SIP message (DEBUG level)
4. SIP message summary (INFO level)
5. inbound and outbound calls (INFO level)
6. registration status change (INFO level)
7. negotiated codec (INFO level)
8. Ethernet link up (INFO level)
9. SLIC chip exception (WARNING and ERROR levels)
10. memory exception (ERROR level)
The Syslog uses USER facility. In addition to standard Syslog payload, it
contains the following components:
GS_LOG: [device MAC address][error code] error message
Example: May 19 02:40:38 192.168.1.14 GS_LOG: [00:0b:82:00:a1:be][000]
Ethernet link is up