M
AKE A
1. Use the leftmost screen or click Phone app to en-
ter dial pad.
2. Select a call mode on the left panel.
3. Select account on the left panel.
4. Enter the number to dial out and tap on dial soft-
key .
R
EDIAL
When the phone has call history, click # key to redial.
Notice: Redial via # key needs configuration on web
UI.
C
H
ALL
Hold: During an active call, tap on softkey "Hold" on
the screen.
Resume: When the call is on hold, tap on softkey
"Unhold" on the screen to resume the call.
C
T
ALL
Blind Transfer
1. During an active call, tap on "More" softkey and
select "Transfer" to bring up the transfer screen.
2. Select "Blind" on the upper left of the screen.
3. Enter the digits and tap on "Send" softkey.
Grandstream
Attended Transfer
GAC2500
1. In a call, click Home key to dial screen. Dial se-
cond number to establish another phone call. The
Audio Conference Phone for
first call is on hold.
TM
Android
2. When second call is established, tap on "More"
softkey and select "Transfer" to bring up the trans-
Quick User Guide
fer screen. The first call would display on the left
panel.
3. Click the dropdown on upper left and choose
"Attended" mode. Then click the on hold call from
left panel.
4. The call is transferred, and it will hang up.
S
WITCH
When there are multiple calls, tap to tag on the top of
LCD to switch current to another.
For detailed information, please consult
A
DD TO
the GAC2500 User Manual available at
In a call, tap on "Add to conf" to bring all calls to a con-
ference.
www.grandstream.com
E
C
ND
Reproduction or transmittal of the entire
End a call by tapping on "End" softkey.
or any part, in any form or by any
R
ECORD
means, electronic or print, for any
1. Tap on "Start recording" in a call to start recording.
purpose without the express written
2. Tap on "End recording" to end recording.
3. On LCD, open Recorder app to access the record-
permission of Grandstream Networks,
ing.
Inc. is not permitted. Information in this
document is subject to change without
notice.
C
7-W
ALL
Initiate Conference
1. Use the leftmost screen or click Phone app to en-
2. Select a call mode on the left panel.
3. Select account on the left panel.
4. Enter the number to dial out.
5. Tap on the number from the list on the left, or
6. Repeat steps 4 and 5 to add up to 6 numbers.
7. Tap on dial softkey and initiate the conference.
Add Party
OLD
1. Tap on the "add" icon
2. Choose the call mode, account, and enter the
3. Tap on call softkey.
4. The callee will be added to the conference when
RANSFER
Participants Operation
Tap on participant icon to bring up more operations.
Host can mute, block, delete a participant and check
his information including whether to use SRTP or co-
dec.
Hold Conference
1. Tap on Hold softkey
2. Tap on Hold softkey again to resume conference.
Lock Conference
1. Tap on Lock softkey
2. Tap on Lock softkey to unlock the conference.
L
INE
More Operation
Tap on "More" on bottom left in a conference to bring
up more options. Host can record, mute, block the con-
C
ONFERENCE
ference, open the DTMF dial pad and MPK, etc.
End Conference
Tap on "End" on bottom right to end the conference.
ALL
C
ONTACTS
C
To open Contacts app, please tap on
ALL
C
ALL
To enter Call History, swipe the screen left and right
and tap on
C
AY
ONFERENCE
ter dial pad.
choose a number from Contacts.
in Conference app to
open a dial pad.
number.
answers.
to hold the conference.
to lock the conference.
When the conference is locked, others cannot join
it.
icon.
H
ISTORY
icon.
A
C
NSWER A
ALL
Account Incoming Call
Tap on "Answer" or "Reject" softkey to operate
the call.
Answer the second or later calls will hold all
the former calls.
Conference Incoming Call
During the conference, the participants will
hear a call waiting tone when there is an con-
ference incoming call. The caller's name and
number would be shown on LCD.
Please choose the number first when there are
multiple incoming calls.
The new call will be added to the conference.
Missed Call
If a call is not answered, LCD would display
Missed Call list. LED becomes flashing red. Users
can open Call History app to check missed calls.
V
OICEMAIL
1. Swipe the LCD and tap on Voice Mail app.
2. Select the account to access voice mails.
Notice:
The voice mail for an account is in LCD
Settings -> Advanced settings -> Account (select
the account)
V
A
OLUME
DJUSTMENT
On LCD, drag up from bottom to display menu bar.
Tap on Volume Up or Volume Down to adjust the
volume.
C
S
ONFERENCE
CHEDULE
1. Login to GAC2500 web UI -> Contacts ->
Schedule, or tap on Schedule app.
2. On LCD, tap on the softkey on upper right, or
click "New Conference" to create a new sched-
ule.
3. Fill the conference name, conference mem-
bers, date, start time, duration, reminder, etc.
If "Auto Conference" is checked, GAC2500
would automatically call other participants to
initiate the conference.
M
C
-
(T
IXED
ONFERENCE
HIRD
PARTY APP AND
SIP
C
)
ACCOUNT LINES
ONFERENCE
Please make sure the device has installed and
logged in the third-party apps, such as Skype,
Skype for Business (Lync 2013), etc.
1. Use the SIP account to initiate a conference.
2. Use dial pad to call the third-party app num-
bers.
3. When the call with third-party app is estab-
lished, it will join the SIP account conference.
4. Tap on the third-party app participant to open
the app for more operations.
C
A
/3.5
(B
ONFERENCE
SSISTANCE
LUETOOTH
MM
AUX
SIP
C
)
AND
ACCOUNT LINES
ONFERENCE
Please make sure the device has enabled
Bluetooth and connected with the cellphone. In
GAC2500
Bluetooth
settings,
please
enable
headset mode.
1. Please use GAC2500 or cellphone to make a
call.
2. On GAC, open Conference app.
3. Tap on add member softkey
, Choose a
SIP account and call the conference members.
4. Then SIP accounts and cell phone would join
the conference.
Or, please make sure the cellphone is connected
to GAC2500 via 3.5mm aux cable.
1. Use cellphone to make a call.
2. Tap on Conference app.
3.
Tap on add member softkey
, Choose a
SIP account and call the conference members.
4.
Then SIP accounts and cell phone would join
the conference.
Notice:
During a conference, turning off Bluetooth or
unplugging 3.5mm AUX cable would cause
communication error.
Please choose the right line sequence when
using 3.5mm AUX cable, otherwise GAC
would not have audio.
When using the 3.5mm AUX cable with a
cellphone, GAC2500 cannot make a cellphone
call from LCD dial pad.
The audio quality may vary based on the
3.5mm AUX cable or the connecting device.
When connected via 3.5mm AUX cable, some
cellphone would be detected after the call is
established.
C
M
ASCADE
ODE
Two GAC2500 with cascade mode can be used in
a larger room.
1. Connect the 2 GAC2500 grey cascade
interface with the RJ48 cable.
2. Choose one device as a master from the
popup.
3. Use any device to operate the conference.
R
EQUIREMENTS
To make sure the best use of GAC2500, the
following requirements are necessary:
1. Please do not move the device during a call.
2. Please do not cover the device.
3. Please face to the device when speaking.
4. Please avoid an electric fan next to the device.
5. To avoid any possible noise, please do not put
the laptop, projector, etc. next to the device.
6. Unplug the power supply before cleaning. Do
not use spray or corrosive liquids.
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