Grandstream networks Ht-488 User manual

Grandstream Networks, Inc.

HT-488

Dual FXS/FXO Port

Analog Telephone Adaptor

HT–488 User Manual www.grandstream.com

Firmware Version 1.0.3.64 support@grandstream.com

TABLE OF CONTENTS

HT-488 USER MANUAL

WELCOME.......................................................................................................................................................4

SAFETY COMPLIANCES................................................................................................................................4

WARRANTY.................................................................................................................................................4

INSTALLATION.................................................................................................................................................5

EQUIPMENT PACKAGING..............................................................................................................................5

CONNECTING YOUR ATA.............................................................................................................................5

FIVE EASY STEPS TO INSTALL THE HT488.....................................................................................................6

PRODUCT OVERVIEW .......................................................................................................................................7

KEY FEATURES...........................................................................................................................................7

HARDWARE SPECIFICATION .........................................................................................................................8

BASIC OPERATIONS ........................................................................................................................................9

GET FAMILIAR WITH VOICE PROMPT.............................................................................................................9

MAKE PHONE CALLS .................................................................................................................................10

CALLING PHONE OR EXTENSION NUMBERS.................................................................................................10

DIRECT IP CALLS......................................................................................................................................10

CALL HOLD...............................................................................................................................................11

CALL WAITING ..........................................................................................................................................11

CALL TRANSFER........................................................................................................................................11

3-WAY CONFERENCING .............................................................................................................................12

PSTN PASS THROUGH .............................................................................................................................13

VOIP-TO-PSTN CALLS ............................................................................................................................13

PSTN-TO-VOIP CALLS.............................................................................................................................14

ROUTE CALLS TO PSTN............................................................................................................................14

FORWARD CALLS TO PSTN.......................................................................................................................14

FORWARD CALLS TO VOIP........................................................................................................................15

FAX SUPPORT...........................................................................................................................................15

CALL FEATURES ...........................................................................................................................................16

LED LIGHT PATTERN INDICATION ..........................................................................................................16

CONFIGURATION GUIDE.................................................................................................................................17

CONFIGURING HT488 THROUGH VOICE PROMPT........................................................................................17

DHCP MODE............................................................................................................................................17

STATIC IP MODE.......................................................................................................................................17

TFTP SERVER ADDRESS...........................................................................................................................17

FIRMWARE SERVER IP ADDRESS...............................................................................................................17

CONFIGURATION SERVER IP ADDRESS ......................................................................................................17

UPGRADE PROTOCOL................................................................................................................................17

FIRMWARE UPGRADE MODE......................................................................................................................17

CONFIGURING HT- 488 WITH WEB BROWSER.............................................................................................17

ACCESS THE WEB CONFIGURATION MENU .............................................................................................17

END USER CONFIGURATION ......................................................................................................................18

ADVANCED CONFIGURATION AND FXS/FXO PORTS PARAMETERS...............................................................21

SAVING THE CONFIGURATION CHANGES.....................................................................................................25

REBOOTING THE HT488 FROM REMOTE ................................................................................................25

CONFIGURATION THROUGH A CENTRAL SERVER.........................................................................................26

SOFTWARE UPGRADE ...................................................................................................................................27

FIRMWARE UPGRADE THROUGH TFTP/HTTP ............................................................................................27

CONFIGURATION FILE DOWNLOAD .............................................................................................................28

FIRMWARE AND CONFIGURATION FILE PREFIX AND POSTFIX........................................................................28

MANAGING FIRMWARE AND CONFIGURATION FILE DOWNLOAD ....................................................................28

RESTORE FACTORY DEFAULT SETTING..........................................................................................................29

GLOSSARY OF VOIP TERMS ..........................................................................................................................30

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TABLE OF FIGURES

HT–488 USER MANUAL

FIGURE 1: CONNECTING THE HT488 ..................................................................................................5

FIGURE 2: INTERCONNECTION DIAGRAM OF THE HT488 ......................................................................6

FIGURE 3: SCREENSHOT OF CONFIGURATION LOG-IN PAGE...............................................................18

FIGURE 4: SCREENSHOT OF REBOOTING SCREEN..............................................................................25

TABLE OF TABLES

HT–488 USER MANUAL

TABLE 1: DEFINITIONS OF THE HT488 CONNECTORS ..........................................................................5

TABLE 2: HT488 TECHNICAL SPECIFICATIONS ....................................................................................7

TABLE 3: HT488 HARDWARE SPECIFICATION......................................................................................8

TABLE 4: HT488 IVR MENU DEFINITIONS...........................................................................................9

TABLE 5: HT488 CALL FEATURE DEFINITIONS ..................................................................................16

TABLE 6: HT488 LED DEFINITIONS..................................................................................................16

TABLE 7: HT488 DEVICE STATUS PAGE DEFINITIONS........................................................................19

TABLE 8: HT488 BASIC SETTINGS PAGE DEFINITIONS.......................................................................19

TABLE 9: HT488 ADVANCED SETTINGS PAGE DEFINITIONS ...............................................................21

TABLE 10: HT488 FXS PORT SETTINGS PAGES DEFINITIONS..........................................................22

TABLE 11: HT488 FXO PORT SETTINGS PAGES DEFINITIONS..........................................................24

TABLE 12: HT488 CALL PROGRESS TONES SETTINGS PAGE DEFINITIONS .........................................25

TABLE OF GUI INTERFACES

HT–488 USER MANUAL

1. SCREENSHOT OF CONFIGURATION LOGIN PAGE

2. STATUS CONFIGURATION PAGE DEFINITIONS

3. SCREENSHOT OF BASIC SETTINGS CONFIGURATION PAGE

4. SCREENSHOT OF ADVANCED SETTINGS CONFIGURATION PAGE

5. SCREENSHOT OF FXS ACCOUNT CONFIGURATION

6. SCREENSHOT OF FXO ACCOUNT CONFIGURATION

7. SCREENSHOT OF CALL PROGRESS TONES CONFIGURATION PAGE

8. SCREENSHOT OF SAVED CONFIGURATION CHANGES

9. SCREENSHOT OF REBOOT PAGE

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WELCOME

Congratulations on becoming an owner of HT488. You made an excellent choice and we hope you enjoy

all of its capabilities.

Grandstream's HT488 is an all-in-one VoIP integrated access device that features superb audio quality,

rich functionalities, high level of integration, compactness and ultra-affordability. The HT488 is fully

compatible with SIP industry standard and can interoperate with many other SIP compliant devices and

software on the market.

Grandstream HT488 is a new addition to the popular HT product family. It is an enhanced model

compared to the award-winning HT488 in that it allows call origination and termination from/to the PSTN

network (via FXO port) remotely and automated emergency call routing through PSTN network.

Grandstream HT488 has been awarded the Best of Show product in 2005 Internet Telephony Conference

and Expo.

SAFETY COMPLIANCES

The HT488 adaptor complies with FCC/CE and various safety standards. The HT488 power adaptor is

compliant with UL standard. Only use the universal power adapter provided with the HT488 package.

The manufacturer’s warranty does not cover damages to the phone caused by unsupported power

adaptors.

WARRANTY

If you purchased your HT488 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.

•This document is contains links to Grandstream GUI Interfaces. Please remember to download these

examples http://www.grandstream.com/user_manuals/GUI/GUI_HT488.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/pdf/HT488UserManual.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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INSTALLATION

EQUIPMENT PACKAGING

The HT488 ATA package contains:

•One HT488 Main Case

•One Universal Power Adaptor

•One Ethernet Cable

CONNECTING YOUR ATA

The HT488 Analog Telephone Adaptor is an all-in-one VoIP integrated device designed to be a total

solution for networks providing VoIP services. The HT488 VoIP features and functions are available

using a regular analog telephone.

FIGURE 1: CONNECTING THE HT488

RJ-45

10M netEther

LAN

WAN

The HT488 has one FXS port and one FXO port. The PHONE port next to the LAN port is a FXS port.

The LINE port on the side of the HandyTone-488 is a FXO port. Both the FXS port and the FXO port can

have a separate SIP account. This is a key feature of HT488 as it supports simultaneous calls on both

the FXS port and FXO port. Telephone calls can be originated from or terminated on the PSTN network

remotely via the FXO port.

TABLE EFINITIONS OF THE ONNECTORS1: DHT488 C

+5V/1.2A Power adapter connection

LAN Port (RJ-45) Connect the LAN port with an Ethernet cable to your PC.

WAN Port (RJ-45) Connect to the internal LAN network or router.

PHONE (RJ-11) FXS port to be connected to analog phones / fax machines.

LINE (RJ-11) FXO port should be connected to the PSTN line

BUTTON Button and two colors led indicator.

RJ-11

FXO Port

PSTN Line

RJ-11

FXS Port

(Phone) +5V/1200mA

RJ-45

10M net

LED Button

Ether

LAN/WAN

(green/red)

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FIVE EASY STEPS TO INSTALL THE HT488

The HT488 is designed for easy configuration and easy installation. Configure the HT488 following the

directions in the Configuration section of this manual.

1. Connect a standard touch-tone analog telephone to the PHONE port.

2. Insert a standard RJ11 telephone cable into the LINE port and connect the other end of the

telephone cable to a wall jack.

3. Insert the Ethernet cable into the WAN port of HT488 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 HandyTone 488 if HT488 is used as a router.

5. Insert the power adapter into the HandyTone 488 and connect it to a wall outlet.

FIGURE 2: INTERCONNECTION DIAGRAM OF THE HT488

Internet

ADSL/Cable

Modem Ethernet

Fax

Cordless Phone

Analog Phone

WAN

LAN

FXSFXO

PSTN

Cloud

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PRODUCT OVERVIEW

HT488 is a next generation dual-port SIP IAD for Internet data, voice, and fax. It has rich features and

had the added functionality of a bridge that enables you to make remote calls over the internet.

KEY FEATURES

Ethernet

Ports DHCP FXS

Port PSTN Pass

– through Voice Mail

Indicator Voice Codec Remote

Configuration

2 RJ45

(LAN/WAN) Server/

Client 1 Yes Yes iLBC, G.723,

G.711, G.729,

G.726, T.38 TFTP/HTTP

TABLE 2: HT488 TECHNICAL SPECIFICATIONS

Lines/SIP Accounts 2 lines / 2 SIP accounts

Protocol Support SIP 2.0 (RFC 3261), TCP/UDP/IP, RTP/RTCP, HTTP, ARP/RARP, ICMP, DNS, DHCP,

NTP, TFTP, PPPoE protocols

Feature Keys 1 button

LAN/WAN Interface RJ-45 10 Mbps

Device Management Web interface or via secure (AES encrypted) central configuration file for mass

deployment

Support device configuration via built-in IVR, Web browser or central configuration file

through TFTP or HTTP

Support Layer 2 (802.1Q, VLAN, 802.1p) and Layer 3 QoS (ToS, DiffServ, MPLS)

Auto/manual provisioning system

NAT-friendly remote software upgrade (via TFTP/HTTP) for deployed devices including

behind firewall/NAT

Syslog support

DHCP Server/Client Yes

Audio Features Advanced Digital Signal Processing (DSP)

Dynamic negotiation of codec and voice payload length

Support for G.723,1 (5.3K/6.3K), G.729A, G.711 µ/A, G.726, and iLBC codecs

In-band and out-of-band DTMF ((in audio, RFC2833, SIP INFO)

Silence Suppression, VAD (voice activity detection), CNG (comfort noise generation),

ANG (automatic gain control)

Adaptive jitter buffer control

Packet delay & loss concealment

Support volume amplification

Support configurable Call Progress Tones

Call Handling Features Caller ID display or block, Call waiting caller ID, Call waiting/flash, Call transfer, hold,

forward, mute, 3-way conferencing

Network and

Provisioning Manual or dynamic host configuration protocol (DHCP) network setup; RTP and NAT

support traversal via STUN

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

Security DIGEST authentication and encryption using MD5 and MD5-sess

Physical Design Stylish and compact design; small universal power supply, ideal for travel

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HARDWARE SPECIFICATION

The table below lists the hardware specification of HT488.

TABLE 3: HT488 HARDWARE SPECIFICATION

LAN interface 1xRJ45 10Base-T

WAN interface 1xRJ45 10Base-T

FXS telephone port 1 x FXS

FXO telephone port (PSTN Port) 1x PSTN pass-through and life line port

Button 1

LED Green and Red color

Universal Switching

Power Adaptor Input: 100-240VAC 50-60 Hz

Output: +5VDC, 1200mA

UL certified

Dimension 70mm (W)

130mm (D)

27mm (H)

Weight 0.6lbs (0.3kg)

Temperature 40 - 130oF

5 – 45oC

Humidity 10% - 90%

(non-condensing)

Compliance

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BASIC OPERATIONS

GET FAMILIAR WITH VOICE PROMPT

HT488 has a stored voice prompt menu for quick browsing and simple configuration. Currently, the voice

prompt menu and the LED button is designed for the FXS port only. To enter the voice prompt menu,

press the LED button or “***” from the analog phone.

TABLE 4: HT488 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 01-05, 07,12-17,47 or 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.729

•G.726

•iLBC

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; or

Enter encoded MAC address to restore factory default setting (See

“Restoring Factory Settings”)

“Invalid Entry” Automatically returns to main menu

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NOTE:

•Once the button is pressed, it enters the voice prompt main menu. If the button is pressed again,

while it is already in the voice prompt menu, it jumps to “Direct IP Call” option and a dial tone is

prompted

•“*” shifts down to the next menu option

•“#” returns to the main menu

•“9” functions as the ENTER key in many cases to confirm an option

•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 (like 192.168.0.26

should be key in like 192168000026, no dot needed while input). Once all of the digits are

collected, the input will be processed.

•Key entry can not be deleted but the phone may prompt error once it is detected

MAKE PHONE CALLS

CALLING PHONE OR EXTENSION NUMBERS

There are currently two methods to make an extension number call:

a) Dial the numbers directly and wait for 4 (default) seconds.

b) Dial the numbers directly, and press # (assuming that “use # as dial key” is selected in the 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 this information. If your phone is

assigned a PSTN-like number such as 6265556789, you will most likely follow the rule 1 + (the

number) – 16266667890. Press # or wait for 4 seconds.

DIRECT IP CALLS

Direct IP calling allows two parties, that is, a HT with an analog phone and another VoIP Device, to talk to

each other in an ad hoc fashion without a SIP proxy. This kind of VoIP calls can be made between two

parties if:

•Both HT-488 and other VoIP Device (i.e. another Handytone ATA or Budgetone SIP phone or

other VoIP unit) have public IP addresses, or

•Both HT-488 and other VoIP Device are on the same LAN using private IP addresses, or

•Both HT-488 and other VoIP Device can be connected through a router using public or private IP

addresses (with necessary port forwarding or DMZ).

TO PLACE A DIRECT IP CALL:

1. Pick up the analog phone (or use the speakerphone),

2. Access the voice menu prompt by dial “***” or press the button on the HT-488

3. Dial “47” to access the direct IP call menu

4. At voice prompt “Direct IP Calling” and dial tone, enter a 12-digit target IP address to

make a call.

Destination ports can be specified by using “*4” (encoding for “:”) followed by the port number.

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EXAMPLES:

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

followed by pressing 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.

NOTE: When placing a direct IP call, the “Use Random Port” should be set to “NO”.

CALL HOLD

This function is applicable on the FXS port for VoIP calls only. While in conversation, pressing the “flash”

button on the connected phone (if the phone has that button) places the remote end on hold. Pressing the

“flash” button again releases the previously held party and the conversation can resume. If no “flash”

button is available, then on-off hook quickly (hook flash) will do the same thing. You may lose the call if

‘hook flash’ is not quick enough.

CALL WAITING

This function is applicable on FXS port for VoIP calls only. If call waiting feature is enabled, while the

user is in a conversation, he will hear a special stutter tone if there is another incoming call. User can

press the flash button to put the current call party on hold and switch to the other call. Pressing flash

button toggles between two active calls.

CALL TRANSFER

The HT488 supports both blind transfer and attended transfer.

Blind Transfer

This function is applicable using the FXS port for VoIP calls only. Assume that parties Aand Bare in

conversation. Party A wants to Blind Transfer Party B to C:

1. Apresses FLASH on the analog phone to hear the dial tone.

2. Then Adials *87, then dials C’s number, and then presses #

3. A can hang up.

NOTE: “Enable Call Feature” has to be set to “Yes” in web configuration page.

Three situations can follow the transfer:

1. A quick confirmation tone (temporarily using the call waiting indication tone) followed by a

dial tone. This indicates the transfer was successful (transferee has received a 200 OK from

transfer target). 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 indicates the transfer has failed.

3. Busy tone keeps playing. This means we have failed to receive the second NOTIFY from the

transferee and the call has timed out. Note: this does not indicate the transfer has been

successful, nor does it indicate the transfer has failed. When transferee is a client that does not

support the second NOTIFY (such as our own earlier firmware), this situation occurs. In bad

network scenarios, this could also happen, although the transfer may have been completed

successfully.

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Attended Transfer

This function is applicable on the FXS port for VoIP calls only. Assume that parties Aand B are in

conversation. Party A wants to Attend Transfer Party B to C:

1. A presses FLASH on the analog phone to get a dial tone;

2. Athen dial C’s number followed by #.

3. If C answers the call, Aand C are in conversation. Then Acan hang up to complete transfer.

4. If C does not answer the call, Acan press “flash” back to talk to B.

NOTE: When Attended Transfer fails and A hangs up, the HT488 will ring user A back again to remind

A that party B is still on the call. Party A can pick up the phone to resume a conversation with party B.

3-WAY CONFERENCING

The HT488 supports both Star Code Style and Bellcore Style 3-way conferencing.

Star Code Style 3-way Conference

This function is applicable on the FXS port for VoIP calls only. Assume that parties Aand Bare in

conversation. Party Awants to bring C into a 3-way conference:

1. Apresses FLASH (on the analog phone, or Hook Flash for old model phones) to get a dial tone.

2. Adials *23 then C’s number then # (or wait for 4 seconds).

3. If C answers the call, then Apresses FLASH to bring B, Cin the conference.

4. If C does not answer the call, Acan press FLASH back to talk to B.

5. If Apresses FLASH during conference, C will be dropped out.

Note: “Enable Call Feature” has to be set to YES in FXS PORT in the web configuration page.

Bellcore Style 3-way Conference

To use the Bellcore Style conference, the “Use Bell-style 3-way Conference” field in FXS PORT web

configuration must be enabled.

Assume that parties Aand Bare in conversation. Party A(using the HT-488) wants to bring C into a 3-

way conference:

1. Apresses FLASH (on the analog phone, or Hook Flash for old model phones) to get a dial

tone.

2. Adials C’s number then # (or wait for 4 seconds).

3. If C answers the call, then Apresses FLASH to bring B, C in the conference.

4. If C does not answer the call, Acan press FLASH back to talk to B.

5. If Apresses FLASH during the conference, C will be dropped out.

Note: Party A is the call initiator for both calls with party B and party C.

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PSTN PASS THROUGH

HT488 supports PSTN pass through using the FXS port. The user can place and receive PSTN calls

when the FXS port is in use.

•To receive PSTN calls, pick up the phone when it rings;

•To complete a PSTN call, press the PSTN access code (*00 is default, or any number configured

in web configuration page) to switch to the PSTN line, hear a dial tone, then dial the number.

It the HT488 looses power, it will function as a jack, enabling a direct connection to the PSTN Line.

VOIP-TO-PSTN CALLS

This function is available using the FXO port. The FXO port functions as a bridge between the Internet

and PSTN. The user can remotely use a PSTN line to initiate a call.

TO MAKE A VOIP-TO-PSTN CALL:

1. Dial the FXO SIP account phone number to establish the VoIP session. The caller will hear the

ring back tone once. Then the caller hears either a special continuous tone or a dial tone. The

special continuous tone is played if the pin code is configured, otherwise, the caller will hear a dial

tone.

2. Enter the pin code (configured on the configuration page). The caller will hear a dial tone and be

connected to the PSTN line if the pin code is valid. If the pin code is invalid, the continuous tone

is played to prompt caller to enter the pin code again. The user may try up to 3 times to enter a

correct pin code. After three (3) tries, the HT488 hangs up.

3. After the caller hears a dial tone from PSTN line, the caller can place the next call.

Note:

•Users can choose whether or not to apply password protection for VoIP-to-PSTN calls. A PIN

(Pin for PSTN calls) consists of up to 8 numeric digits and can be configured using the BASIC

SETTINGS of the web configuration page. By default, there is no password protection. (i.e. there

is no authentication required for callers on the use of PSTN line through HT488).

•When a PIN is configured for VOIP-to-PSTN call flow, the VoIP device that calls into the HT488

FXO account needs to configure RFC2833 or SIP Info for DTMF digit transmission.

•The special continuous tone is the prompt to enter a valid PIN code. If a caller doesn’t enter a

valid PIN, the HT488 times out after 10 seconds. Users may press the “#” key to indicate the end

of an input or wait 4 seconds.

•On the web configuration page, if the “Forward to PSTN” is configured, the second stage dialing

format is eliminated, so after dialing into the FXO SIP account number, the PSTN number will be

called automatically

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PSTN-TO-VOIP CALLS

This function is available using the FXO port. The FXO port functions as a bridge between the Internet

and PSTN and enables calls to be passed from the PSTN network to VoIP. The user can make VoIP calls

remotely by dialing into the FXO line port on HT488.

TO MAKE A PSTN-TO-VOIP CALL:

1. Make an incoming call to the PSTN line on FXO port. The phone will ring for 4 times by default

(this setting is configurable on the configuration page).

2. If no one answers the call after 4 rings (default configuration), then the caller hears either a

special continuous tone (prompting a PIN number) or a dial tone.

3. Enter a valid PIN. The caller will hear dial tone and be bridged to VoIP. If an incorrect PIN is

inputted, the continuous tone prompts caller to enter a valid PIN. The caller may try 3 times to

enter a valid PIN, then the HT488 will hang up.

4. The caller can dial a VoIP number followed by # (or wait for 4 seconds), the VoIP call will be

initiated from the SIP account configured on the FXO port.