Grandstream Networks GXP-1100 User manual

GXP1100/GXP1105 USER MANUAL
Grandstream Networks, Inc.
GXP1100/GXP1105
Small Business IP Phone

FIRMWARE VERSION 1.0.5.23 GXP1100/GXP1105 USER MANUAL Page 2 of 49
GXP1100/GXP1105 User Manual
Index
GUI INTERFACE EXAMPLES....................................................................5
GNU GPL INFORMATION..........................................................................6
CHANGE LOG ...........................................................................................7
FIRMWARE VERSION 1.0.5.15............................................................................................................7
FIRMWARE VERSION 1.0.4.23............................................................................................................7
FIRMWARE VERSION 1.0.4.9..............................................................................................................7
WELCOME.................................................................................................8
PRODUCT OVERVIEW..............................................................................9
FEATURE HIGHTLIGHTS.....................................................................................................................9
GXP1100/GXP1105 TECHNICAL SPECIFICATIONS...........................................................................9
INSTALLATION........................................................................................11
EQUIPMENT PACKAGING .................................................................................................................11
CONNECTING YOUR PHONE ........................................................................................................... 11
SAFETY COMPLIANCES....................................................................................................................12
WARRANTY.........................................................................................................................................13
USING THE GXP1100/GXP1105..............................................................14
GETTING FAMILAR WITH THE KEYPAD...........................................................................................14
MAKING PHONE CALLS.....................................................................................................................15
2 CALLS WITH 1 SIPACCOUNT.................................................................................................15
COMPLETING CALLS..................................................................................................................15
MAKING CALLS USING IP ADDRESSES...................................................................................16
ANSWERING PHONE CALLS ............................................................................................................17
RECEIVING CALLS......................................................................................................................17
DURING A PHONE CALL....................................................................................................................17
CALL WAITING/CALL HOLD .......................................................................................................17
MUTE............................................................................................................................................18
CALL TRANSFER ........................................................................................................................18
3-WAY CONFERENCING ............................................................................................................19
VOICE MESSAGES (MESSAGE WAITING INDICATOR)...........................................................21

FIRMWARE VERSION 1.0.5.23 GXP1100/GXP1105 USER MANUAL Page 3 of 49
CALL FEATURES................................................................................................................................21
CONFIGURATION GUIDE........................................................................24
CONFIGURATION VIA IVR MENU......................................................................................................24
CONFIGURATION VIA WEB BROWSER ...........................................................................................25
DEFINITIONS ......................................................................................................................................26
STATUS PAGE DEFINITIONS .....................................................................................................27
ACCOUNT PAGE DEFINITIONS .................................................................................................28
SETTINGS PAGE DEFINITIONS.................................................................................................35
NETWORK PAGE DEFINITIONS.................................................................................................38
MAINTENANCE PAGE DEFINITIONS.........................................................................................39
NAT SETTINGS...................................................................................................................................42
CLICK-TO-DIAL...................................................................................................................................42
UPGRADING AND PROVISIONING ........................................................45
UPGRADE VIA IVR MENU..................................................................................................................45
UPGRAGE VIAWEB GUI....................................................................................................................45
NO LOCAL TFTP/HTTP SERVERS ....................................................................................................46
CONFIGURATION FILE DOWNLOAD................................................................................................47
RESTORE FACTORY DEFAULT SETTINGS...........................................48
EXPERIENCING THE GXP1100/GXP1105 ..............................................49

FIRMWARE VERSION 1.0.5.23 GXP1100/GXP1105 USER MANUAL Page 4 of 49
Table of Tables
GXP1100/GXP1105 User Manual
Table 1: GXP1100/GXP1105 TECHNICAL SPECIFICATIONS.....................................................................9
Table 2: GXP1100/GXP1105 EQUIPMENT PACKAGING.......................................................................... 11
Table 3: GXP1100/GXP1105 CONNECTORS............................................................................................11
Table 4: GXP1100/GXP1105 KEYPAD DEFINITIONS ...............................................................................14
Table 5: CALL FEATURES..........................................................................................................................21
Table 6: GXP1100/GXP1105 IVR MENU....................................................................................................24
Table of Figures
GXP1100/GXP1105 User Manual
Figure 1: GXP1100/GXP1105 Ports............................................................................................................ 11
Figure 2: GXP1100/GXP1105 Pin-out.........................................................................................................12
Figure 3: GXP1100/GXP1105 Multi Purpose Key - 3 way Conference ......................................................19
Figure 4: Click-to-Dial..................................................................................................................................43

FIRMWARE VERSION 1.0.5.23 GXP1100/GXP1105 USER MANUAL Page 5 of 49
GUI INTERFACE EXAMPLES
http://www.grandstream.com/products/gxp_series/general/documents/gxp21xx_gui.zip
1. Screenshot of Configuration Login Page
2. Screenshot of Status Page
3. Screenshot of Basic Setting Configuration Page
4. Screenshot of Advanced User Configuration Page
5. Screenshot of SIPAccount Configuration Page
6. Screenshot of Saved Configuration Changes Page
7. Screenshot of Reboot Page

FIRMWARE VERSION 1.0.5.23 GXP1100/GXP1105 USER MANUAL Page 6 of 49
GNU GPL INFORMATION
GXP1100/GXP1105 firmware contains third-party software licensed under the GNU General Public
License (GPL). Grandstream uses software under the specific terms of the GPL. Please see the GNU
General Public License (GPL) for the exact terms and conditions of the license.
Grandstream GNU GPL related source code can be downloaded from Grandstream web site from:
http://www.grandstream.com/support/faq/gnu_gpl.

FIRMWARE VERSION 1.0.5.23 GXP1100/GXP1105 USER MANUAL Page 7 of 49
CHANGE LOG
This section documents significant changes from previous versions of GXP1100/GXP1105 user manuals.
Only major new features or major document updates are listed here. Minor updates for corrections or
editing are not documented here.
FIRMWARE VERSION 1.0.5.15
Updated Web GUI interface examples with new screenshots for 1.0.5.15. [GUI INTERFACE
EXAMPLES]
Added pin-out information. [CONNECTING YOUR PHONE]
Updated Auto Attended Transfer information. [CALL TRANSFER]
Updated Click-To-Dial feature information. [CLICK-TO-DIAL]
Updated Web GUI options. [DEFINITIONS]
FIRMWARE VERSION 1.0.4.23
Updated generic config file cfg.xml information. [CONFIGURATION FILE DOWNLOAD]
Added "Use Privacy Header" and "Use P-Preferred-Identity Header" options in web GUI. [ACCOUNT
PAGE DEFINITIONS]
Added NAT Settings information. [NAT SETTINGS]
Added Click-to-Dial feature. [CLICK-TO-DIAL]
FIRMWARE VERSION 1.0.4.9
Added instructions for connecting the phone. [CONNECTING YOUR PHONE]
Added Multi Purpose Key options VMsg, Transfer, Intercom. [SETTINGS PAGE]
Added IPv6 configuration options. [SETTINGS PAGE]
Added Matching Incoming Caller ID function in Account Setting. [ACCOUNT PAGE DEFINITIONS]
Added GNU GPL information. [GNU GPL INFORMATION]
Added Change Log for this user manual. [CHANGE LOG]

FIRMWARE VERSION 1.0.5.23 GXP1100/GXP1105 USER MANUAL Page 8 of 49
WELCOME
Thank you for purchasing Grandstream GXP1100/GXP1105 Small Business IP Phone.
GXP1100/GXP1105 is a next generation small business IP phone that features up to 2 calls with 1 SIP
account, 4 programmable keys, single network port, integrated PoE (GXP1105 only). The
GXP1100/GXP1105 delivers superior HD audio quality, leading edge telephony features, automated
provisioning for easy deployment, advanced security protection for privacy, and broad interoperability with
most 3rd party SIP devices and leading SIP/NGN/IMS platforms. It is a perfect choice for small business,
lobby, and hotel applications looking for a high quality, basic IP phone with attractive cost.
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.
Warning:
Please do not use a different power adaptor with the GXP1100 as it may cause damage to the products
and void the manufacturer warranty.
This document is subject to change without notice. The latest electronic version of this user manual is
available for download here:
http://www.grandstream.com/support
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.

FIRMWARE VERSION 1.0.5.23 GXP1100/GXP1105 USER MANUAL Page 9 of 49
PRODUCT OVERVIEW
FEATURE HIGHTLIGHTS
Single SIP Account, up to 2 calls, 4 programmable keys
HD handset with support for wideband audio
Single 10/100Mbps network port, integrated PoE (GXP1105 only)
7 dedicated function keys for Hold, Flash/Call Waiting, Transfer, Message, Mute, Volume, Send/Redial
Automated provisioning using TR-069 or AES encrypted XML configuration file, SRTP and TLS for
advanced security and privacy protection, LLDP, IPv6
GXP1100/GXP1105 TECHNICAL SPECIFICATIONS
Table 1: GXP1100/GXP1105 TECHNICAL SPECIFICATIONS
Protocols and
Standards
SIP RFC3261, TCP/IP/UDP, RTP/RTCP, HTTP/HTTPS, ARP, ICMP, DNS (A
record, SRV, NAPTR), DHCP, PPPoE, TELNET, TFTP, NTP, STUN, TR-069,
802.1x, LLDP, LLDP-MED, IPv6, TLS, SRTP
Network Interfaces
Single 10/100Mbps port, integrated PoE (GXP1105 only)
Graphic Display
N/A
Feature Keys
4 programmable keys, 7 dedicated function keys for HOLD, FLASH, TRANSFER,
MUTE, VOLUME, SEND/REDIAL and MESSAGE (with LED indicator)
Voice Codec
Support for G.723.1, G.729A/B, G.711u/a, G.726-32, G.722 (wide-band), iLBC,
in-band and out-of-band DTMF (in audio, RFC2833, SIP INFO)
Telephony Features
Hold, transfer, forward, 3-way conference, call waiting, off-hook auto dial,
click-to-dial, flexible dial plan, personalized music ringtones, server redundancy
and fail-over
HD Audio
Yes, HD handset with support for wideband audio
Headset Jack
N/A
Base Stand
Yes, 1 angle position available
Wall Mountable
Yes
QoS
Layer 2 (802.1Q, 802.1p) and Layer 3 (ToS, DiffServ, MPLS) QoS
Security
User and administrator level passwords, MD5 and MD5-sess based
authentication, 256-bit AES encrypted configuration file, TLS, SRTP, 802.1x media
access control
Multi-language
English, German, Italian, French, Spanish, Portuguese, Russian, Croatian,

FIRMWARE VERSION 1.0.5.23 GXP1100/GXP1105 USER MANUAL Page 10 of 49
Simplified Chinese, traditional Chinese, Korean, Japanese, and etc supported in
web configuration interface
Upgrade and
Provisioning
Firmware upgrade via TFTP/HTTP/HTTPS, mass provisioning using TR-069 or
AES encrypted XML configuration file
Power and Green
Energy Efficiency
Universal power adapter:
Input: 100-240VAC 50-60Hz; Output: 5VDC, 800mA
Integrated Power-over-Ethernet (802.3af, GXP1105 only)
Typical power consumption under 1W (power adapter) or under 1.5W (PoE)
Physical
Unit dimension: 201mm (W) x 154mm (H) x 78mm (D)
Unit weight: 0.6kg
Package weight: 1.0kg
Operating
Temperature and
Humidity
32-104 oF / 0-40 oC, 10-90% (non-condensing)
Package Content
GXP1100/GXP1105 phone, handset with cord, base stand, universal power supply,
network cable, quick start guide
Compliance
FCC Part 15 (CFR 47) Class B; EN55022 Class B, EN55024, EN61000-3-2,
EN61000-3-3, EN60950-1; AS/NZS CISPR 22 Class B,AS/NZS CISPR 24, RoHS;
UL 60950 (power adapter)

FIRMWARE VERSION 1.0.5.23 GXP1100/GXP1105 USER MANUAL Page 11 of 49
INSTALLATION
EQUIPMENT PACKAGING
Table 2: GXP1100/GXP1105 EQUIPMENT PACKAGING
Main Case
Yes
1
Handset
Yes
1
Phone Cord
Yes
1
Power Adaptor
Yes
1
Ethernet Cable
Yes
1
Phone Stand
Yes
1
Quick Start Guide
Yes
1
CONNECTING YOUR PHONE
Figure 1: GXP1100/GXP1105 Ports
Table 3: GXP1100/GXP1105 CONNECTORS
Handset Port
RJ9 handset connector port
LAN Port
10/100Mbps RJ-45 port connecting to Ethernet, integrated PoE (GXP1105 only)
Power Jack
5V DC Power connector port

FIRMWARE VERSION 1.0.5.23 GXP1100/GXP1105 USER MANUAL Page 12 of 49
To set up the GXP1100/GXP1105, follow the steps below:
1. Attach the phone stand to the back of the phone where there is a slot for the phone stand;
2. Connect the handset and main phone case with the phone cord;
3. Connect the LAN port of the phone to the RJ-45 socket of a hub/switch or a router (LAN side of the
router) using the Ethernet cable;
4. Connect the 5V DC output plug to the power jack on the phone; plug the power adapter into an
electrical outlet. If PoE switch is used on GXP1105 in step 3, this step could be skipped;
5. The LED on the up right corner will light up in red during the booting up/provisioning/upgrading
process. Before continuing, please wait for the LED turn off;
6. Pick up the handset and the dial tone will be heard. Press *** to use the IVR menu and enter menu
options to hear the corresponding voice prompt. For example, dial 02 in the IVR menu will hear the IP
address. You can further configure the phone using the web GUI by entering GXP1100/GXP1105's IP
address.
Please see below the pin-out information for GXP1100/GXP1105.
Figure 2: GXP1100/GXP1105 Pin-out
SAFETY COMPLIANCES
The GXP1100/GXP1105 phone complies with FCC/CE and various safety standards. The
GXP1100/GXP1105 power adapter is compliant with the UL standard. Use the universal power adapter
provided with the GXP1100/GXP1105 package only. The manufacturer’s warranty does not cover
damages to the phone caused by unsupported power adapters.
GXP1100/GXP1105 Power Jack
GXP1100/GXP1105 Handset Jack
GXP1100/GXP1105 Handset Plug

FIRMWARE VERSION 1.0.5.23 GXP1100/GXP1105 USER MANUAL Page 13 of 49
WARRANTY
If the GXP1100/GXP1105 phone was purchased from a reseller, please contact the company where the
phone was purchased for replacement, repair or refund. If the phone was purchased directly from
Grandstream, contact the Grandstream Sales and Service Representative for a RMA (Return Materials
Authorization) number before the product is returned. Grandstream reserves the right to remedy warranty
policy without prior notification.
Warning:
Use the power adapter provided with the phone. Do not use a different power adapter as this may damage
the phone. This type of damage is not covered under warranty.

FIRMWARE VERSION 1.0.5.23 GXP1100/GXP1105 USER MANUAL Page 14 of 49
USING THE GXP1100/GXP1105
GETTING FAMILAR WITH THE KEYPAD
The following table describes the buttons used on the GXP1100/GXP1105 keypad.
Table 4: GXP1100/GXP1105 KEYPAD DEFINITIONS
Hold. Place active call on hold, or resume the call on hold.
Flash. Flash key can be used for multiple purposes.
Call waiting. Bring up a new line; or answer the second incoming call.
3-way Conference. Establish 3-way conference when FLASH key is configured
as CONF. Before using the Flash key for 3-way conference, "Enable Flash key as
CONF" option has to be set to "Yes" under web GUI->Advanced Settings.
Transfer. Transfer an active call to another number.
Message. Retrieve voicemail messages.
Programmable hard key. It can be configured for multiple purposes: Speed dial,
Dial DTMF, VMsg, Call Return, 3-way Conference, Transfer, Intercom.
Mute. Press to mute/unmute an active call.
Send. It can be used as Send or Redial.
Send. Enter the digits and then press Send to dial out the number.
Redial. Redial when there is a previously dialed call.
Volume. Press "-" or "+" to adjust the volume.
0 - 9, *, #
Standard phone keypad.

FIRMWARE VERSION 1.0.5.23 GXP1100/GXP1105 USER MANUAL Page 15 of 49
MAKING PHONE CALLS
2 CALLS WITH 1 SIP ACCOUNT
GXP1100/GXP1105 can support up to two lines “virtually” mapped to one SIP account. By picking up the
handset, the GXP1100/GXP1105 will be in off hook state and the dial tone will be heard. To make a call,
dial out the number with the current line.
During the call, users can press the FLASH key to hold the current call and make/answer another call. If
they are 2 calls established, users can switch the two lines by pressing the FLASH key.
COMPLETING CALLS
The GXP1100/GXP1105 allows you to make phone calls after picking up the handset. There are four ways
to complete calls.
Dial. Enter the number and send out.
Take handset off hook. You shall hear dial tone from the handset;
Enter the number;
Press SEND key or # to dial out.
Redial. Redial the last dialed number.
Take handset off hook. You shall hear dial tone from the handset;
Press SEND key.
Speed Dial. Dial the number configured as Speed Dial on Multi Purpose Key.
Go to GXP1100/GXP1105 Web GUI->Settings->Programmable Keys, configure the
Multi-Purpose Key's Key Mode as Speed Dial. Enter the Description and Value (the number to be
dialed out) for the Multi-Purpose Key. Click on "Save and Apply" at the bottom of the Web GUI
page;
Take handset off hook. You shall hear dial tone from the handset;
Press the configured Speed Dial key.
Call Return. Dial the last answered call.
Go to GXP1100/GXP1105 Web GUI->Settings->Programmable Keys, configure the Multi
Purpose Key's Key Mode as Call Return. No Value has to be set on the Multi Purpose Key for Call
Return;
Take handset off hook. You shall hear dial tone from the handset;
Press the configured Call Return key to dial out.

FIRMWARE VERSION 1.0.5.23 GXP1100/GXP1105 USER MANUAL Page 16 of 49
Note:
After entering the number, the phone waits for the No Key Entry Timeout (Default timeout is 4 seconds,
configurable via Web GUI) before dialing out. Press SEND or # key to override the No Key Entry
Timeout;
If digits have been entered after handset is off hook, the SEND key will works as SEND instead of
REDIAL;
By default, # can be used as SEND to dial the number out. Users could disable it by setting "User # as
Dial Key" to "No" from Web GUI->Account->Call Settings.
MAKING CALLS USING IP ADDRESSES
Direct IP Call allows two phones to talk to each other in an ad-hoc fashion without a SIP proxy. VoIP calls
can be made between two phones if:
Both phones have public IP addresses; or
Both phones are on the same LAN/VPN using private or public IP addresses; or
Both phones can be connected through a router using public or private IP addresses (with necessary
port forwarding or DMZ).
To make a direct IP call, please follow the steps below:
Take handset off hook. You shall hear dial tone from the handset;
Press *** to enter the GXP1100/GXP1105 IVR menu;
Enter 47 for Direct IP Call. After hearing "Direct IP Calling", the dial tone will be heard again;
Enter the target IP address to dial (Please see example below).
For example:
If the target IP address is 192.168.1.60 and the port is 5062 (i.e., 192.168.1.60:5062), input the following:
192*168*1*60#5062. The * key represents the dot (.), the # key represents colon (:). Wait for about 4
seconds and the phone will initiate the call.
Quick IP Call Mode:
The GXP1100/GXP1105 also supports Quick IP Call mode. This enables the phone to make direct IP calls
using only the last few digits (last octet) of the target phone's IP address. This is possible only if both

FIRMWARE VERSION 1.0.5.23 GXP1100/GXP1105 USER MANUAL Page 17 of 49
phones are under the same LAN/VPN. This simulates a PBX function using the CMSA/CD without a SIP
server. Controlled static IP usage is recommended.
To enable Quick IP Call Mode, go to GXP1100/GXP1105 Web GUI->Settings->Call Features, set "Use
Quick IP Call Mode" to "Yes". Then take the handset off hook and dial #xxx where x is 0-9 and xxx<255.
Press # or SEND and a direct IP call to aaa.bbb.ccc.XXX will be completed. "aaa.bbb.ccc" is from the local
IP address regardless of subnet mask. The number #xx or #x are also valid. The leading 0 is not required
(but it's OK).
For example:
192.168.0.2 calling 192.168.0.3 -- dial #3 followed by # or "SEND";
192.168.0.2 calling 192.168.0.23 -- dial #23 followed by # "SEND";
192.168.0.2 calling 192.168.0.123 -- dial #123 followed by # "SEND";
192.168.0.2: dial #3 and #03 and #003 results in the same call -- call 192.168.0.3.
Note:
The # will represent colon ":" in direct IP call rather than SEND key as in normal phone call;
If you have a SIP server configured, direct IP call still works. If you are using STUN, direct IP call will
also use STUN;
Configure the "User Random Port" to "No" when completing direct IP calls.
ANSWERING PHONE CALLS
RECEIVING CALLS
Single incoming call. Phone rings with selected ring tone. Answer call by taking handset off hook;
Multiple incoming calls. When another call comes in while having an active call, the phone will
produce a Call Waiting tone (stutter tone). Answer the incoming call by pressing the FLASH key. The
current active call will be put on hold.
DURING A PHONE CALL
CALL WAITING/CALL HOLD
Hold. Place a call on hold by pressing the HOLD key;
Resume. Press the HOLD key again to resume;

FIRMWARE VERSION 1.0.5.23 GXP1100/GXP1105 USER MANUAL Page 18 of 49
Multiple calls. Automatically place active call on hold or switch between two calls by pressing the
FLASH key. Call waiting tone (stutter tone) will be audible when the line is in use.
Note:
If users hang up the current call while there is a call on hold in the other line, there will be an audible ring
tone indicating a call is on hold while your handset is put on hook. Pick up the handset so users can
resume with the call on hold.
MUTE
During an active call, press the MUTE key to mute/unmute the microphone.
CALL TRANSFER
GXP1100/GXP1105 supports Blind Transfer, Attended Transfer andAuto-Attended Transfer.
Blind Transfer.
During the first active call, press TRAN key and dial the number to transfer to;
Press SEND key or # to complete transfer of active call.
Attended Transfer.
During the first active call, press FLASH key. The first call will be put on hold;
Enter the number for the second call and establish the call;
Press TRAN key;
Press FLASH key to transfer the call.
Auto-Attended Transfer.
Set "Auto-Attended Transfer" to "Yes" under Web GUI->Settings->Call Features. And then click
"Save and Apply" on the bottom of the page;
Establish one call first;
During the call, press TRAN key. A new line will be brought up and the first call will be
automatically placed on hold;

FIRMWARE VERSION 1.0.5.23 GXP1100/GXP1105 USER MANUAL Page 19 of 49
Enter the number and press SEND key or # to make a second call;
Press TRAN key again. The call will be transferred.
Note:
To transfer calls across SIP domains, SIP service providers must support transfer across SIP domains.
3-WAY CONFERENCING
GXP1100/GXP1105 can host 3-way conference call (PCMU/PCMA) by using Multi Purpose Key or FLASH
key.
To use Multi-Purpose Key to establish 3-way conference call, go to GXP1100/GXP1105 Web
GUI->Settings->Programmable Keys, configure the 3-way conference as the Multi Purpose Key mode.
Click "Save and Apply" on the bottom of the page. Then follow the steps below for 3-way conferencing.
Figure 3: GXP1100/GXP1105 Multi Purpose Key - 3 way Conference
1. Initiate a conference call.
Establish two active calls with two parties respectively;
Press the Multi Purpose Key previously configured as "3-way Conference" in Web GUI;
3-way conference will be established.
2. Split call in conference.
During the 3-way conference, press HOLD key. The conference call will be split and both calls

FIRMWARE VERSION 1.0.5.23 GXP1100/GXP1105 USER MANUAL Page 20 of 49
will be put on hold separately;
Press HOLD key again and it will resume the 2-way conversation with the line when
establishing the conference call;
Press FLASH key to toggle between the 2 lines;
Users could re-establish conference call by pressing the Multi Purpose Key again.
3. End Conference.
Press HOLD key to split the conference call. The conference call will be ended with both calls
on hold; Or
Users could simply hang up the call to terminate the conference call.
To use Flash key to establish 3-way conference call, go to GXP1100/GXP1105 Web
GUI->Settings->Call Features, set "Enable FLASH key as CONF" to "Yes". Click on "Save and Apply"
on the bottom of the Web GUI page. Follow the steps below to host the 3-way conference.
1. Initiate a conference call.
Initiate and establish two active calls with two parties from GXP1100/GXP1105;
Press the FLASH Key;
3-way conference will be established.
2. Split call in conference.
During the 3-way conference, press HOLD key. The conference call will be split and both calls
will be put on hold separately;
Press HOLD key again and it will resume the 2-way conversation with the line when
establishing the conference call;
Users could re-establish conference call by pressing the Multi-Purpose Key again.
3. End Conference.
Press HOLD key to split the conference call. The conference call will be ended with both calls
on hold; Or
Users could simply hang up the call to terminate the conference call.
Note:
The party that starts the conference call has to remain in the conference for its entire duration, you can
put the party on mute but it must remain in the conversation. Also, this is not applicable when the
feature "Transfer on Conference Hangup" is turned on.