Giant Telecom A2510 2.4GHz FHSS Cordless Phone w/ CID User Manual
Giant Telecom Limited 2.4GHz FHSS Cordless Phone w/ CID
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![83 Getting Started Install and Charge the Battery Pack Open the battery cover by gently pressing down on the top of the cover while sliding it down. Plug the battery pack into the battery compartment and close the compartment. * Place the handset in the base station to charge for 14 hours prior for first use. If you don’t properly charge the phone, battery performance will be compromised. 4 Basic Telephone Operation Power on operation z The handset is powered by plugging a battery or by putting on cradle. After then, it will begin to search for a base station that has been registered to that handset. The ‘Aerial’ icon will flash and “RANGE OUT” is shown during searching. z After several second, the LCD will display “XX NEW CALLS” if there are new calls existing or show the handset number and the handset name. Making external calls Normal dialing z Press [ ] and the ‘Phone’ icon will be on. If handset is not subscribed or out of range, [ ] key cannot be used and pressing it will bring on an error tone. z The ‘EXT’ icon will be on after the PSTN line is connected. (In case that one handset is connected with the PSTN line, the ‘EXT’ icon on the other handset will also be on indicating that the line is engaged.) z Dial the number as required. 2 9 5 1 z Press [R/] to flash the line to perform some PABX function and the LCD will be cleared waiting for new input. The number dialed after the ‘Flash’ will not be stored in the redial memory. z If call timer has been set to ON, then after 8 seconds of no further key press, the call timer counter EXT](https://usermanual.wiki/Giant-Telecom/A2510/User-Guide-604446-Page-9.png)
![9will display. It start counting from ’00 : 01’ when off hook. 0 0 : 0 8 z To terminate the call, press [ ]. The last call time will remain for 2 seconds. z The call can also be terminated by putting the handset on cradle. In that case, the call time will also be displayed for 2 seconds. 0 1 : 3 5 Pre-dialing z A user may enter the number (up to 25 digits) before seizing the line as shown; 9 3 2 1 z Press [C] to delete the last input digit. To add a pause digit, press [ / P] and a letter ‘P’ will be shown. Long Press the [C] key can clear all digits at once. z After the desired number is entered, press [ ] to seize line and the entered number will be dialed out. Redialing z During standby mode, press [ / P] will show one of the 10 last dialed numbers. 9 6 4 7 8 9 0 4 z If the number is longer than 12 digits, at first, the first page will be shown aligning right, the digit number equals to the total number minus 12. 6 7 8 9 0 7 8 2s later, the second page (the rest 12 digit) will be displayed. 1 2 3 4 5 6 1 2 9 0 8 4 EXT](https://usermanual.wiki/Giant-Telecom/A2510/User-Guide-604446-Page-10.png)
![10z Press [ / P] to view another last dialed number in the list. Or press [Menu/ ] [ / ] to view the former or later number. z Press [ ] to seize line and the selected number will be redialed. Recalling a number from the phone book directory z To store a number into the directory, please refer to the menu functions. z To retrieve the number stored in the phone book memory during standby mode, press [R/] and the name for the first number stored in a sorted listed in the directory will be shown. A N G E L A z Users may like to press the keys [1] – [9] and [Menu/ ] [ /] key to locate the desired entry. For example, press [8 TUV] to locate the entry with the name started with ‘T’. Press [6 MNO] to locate the name started with ‘M’. z Press [ ] to dial out the number immediately. z If the phone book is empty, an error tone will be heard following with an error message. E MP T Y z The error message will be displayed for 2 seconds before reverting to standby mode. Call log reply z During standby mode, press [ /] to view unread caller ID or through menu to browse call log list. z To call back to the caller, press [ ] and the viewed number will be dialed out. Temp tone dial z A user may like to change to DTMF dialing temporary during the call if the call has been setup for pulse dialing. z This can be done by pressing [*/ ] key for more than 2 seconds during the call is active. A digit ‘d’ will be shown on the display, indicating the ‘Change to DTMF’ command is sent out. z Adding the digit ‘d’ is also possible in pre-dial buffer. Receiving external Call z When receiving an external call, all handsets will ring. The ‘EXT’ icon and the Msg LED will flash. z Base In-use LED will flash according to the ring cadence. z If the network provider support caller ID, the caller’s number or name will be shown. (See the section of Caller ID operation for details.) z Press [ ] to seize line. z If auto-answer function is enabled, the line can also be automatically connected after the handset is EXT](https://usermanual.wiki/Giant-Telecom/A2510/User-Guide-604446-Page-11.png)
![11lifted up from base. For preventing accidental line disconnection, users cannot press [ ] to go on-hook within 3 seconds after the handset is lifted up. To avoid handset dropping from hand, handset will not go to on-hook when placing handset onto cradle within 3 seconds too. Making internal calls z Press [INT/ OK] key during standby mode to initiate the internal connection and then press a digit to specify which handset to call to. 2 z The other handset will ring with the ‘INT’ icon flashing. z If the input handset number is wrong, number does not display on the LCD, but the dial tone will be heard in earpiece and allow correct number to enter again. z When the other handset answered the call, the internal call is established. Press [ ] or [INT/ OK] to release the internal call. Receiving internal Call z When receiving an internal call, the handset will ring. The ‘INT’ icon and the Msg LED will flash. The handset number of the calling handset will also be shown on the left. 1 z Press [ ] to answer the internal call and the flashing icon stop flashing. Call transfer z When an external call is established, press [INT / OK] to initiate the internal connection. z The external call will be on hold. ‘EXT’ and ‘INT” icon will keep on. z Press a digit for handset number. 2 H z The other handset will ring. After an internal connection is made, press [ ] to transfer the external call to another handset (If internal call has been held after call toggle, call transfer is also feasible). z If [ ] is pressed before another handset is answered, the call transfer procedure will be cancelled and the external call will be disconnected. z If [INT / OK] is pressed before another handset is answered, the call transfer procedure will be cancelled and the external call connection is regained. INT INT EXTINT INT](https://usermanual.wiki/Giant-Telecom/A2510/User-Guide-604446-Page-12.png)
![12Call Toggle z A user may toggle between the external call and the internal call when either is on hold. Press [INT / OK] key to perform call toggling. z During internal call waiting, “INT” icon will flash. Three party conference z When an external call and an internal call are both established at the same time and one of them is on hold, the initiating handset can start a three-party conference by pressing and holding [#] for 2 seconds. z When an external call has been established between external caller and one handset, user can press [] on another handset to join the call with a notification tone. C O N F E R E N C E z If one handset has pressed [ ] during the conference, it will go on-hook with a notification tone and the other handset will continue to establish the external call. Mute conversation z During conversation (internal or external call), the microphone can be muted by pressing [ ]. After the function is selected, the ‘mute’ icon will be on. 1 0 : 0 6 z When the outgoing conversation is muted, a user may press [ ] to un-mute the speech path. After that, the ‘mute’ icon will be cleared. Changing Volume z During conversation (internal and external call), the earpiece volume can be adjusted by pressing [/] or [Menu/ ]. z The adjusted volume level is indicated by a volume bar as shown; [ □ □ □ ] z The volume bar will appear for 2 seconds after the last key press. z When press [ / ] to increase volume if level is 5 or press [Menu/ ] to decrease if it is 1, it will wrap to level 1 or level 5. EXTEXT EXTINT EXT](https://usermanual.wiki/Giant-Telecom/A2510/User-Guide-604446-Page-13.png)
![13Key lock z In standby mode, a user may press and hold the [*/ ] key for 2 seconds to lock the keyboard. Once it is locked, the ‘key’ icon will be shown and ‘* TO UNLOCK’ message will be displayed; * T O U N L O C K z All key input will be ignored when the keyboard is locked. To unlock the keyboard, press and hold the [*/ ] key for 2 seconds. z When the keyboard is locked, user can still accept the incoming call by pressing the [ ] key. After the call, keyboard is still locked. Emergency Call z When keypad is locked, emergency number can be dialed out. z Press emergency number first in locked mode and it will be displayed if matched, then press [ ] to dial. z Emergency call number is factory setting. Low battery Warning z When the battery low condition is detected during standby mode, low-battery warning tone can be heard and the empty battery sign is shown. L O W B A T T z If, however, the low battery condition is detected when a call is active, a low-battery warning tone can be heard every 15 seconds and the empty battery sign is shown. Whereas in idle mode, the low-battery warning tone will emit every 30 seconds in order to save power. z If user switches off the low battery warning tone through menu tones item, the warning tone will be off. z The current call connection will be halted after 3.5 minutes if battery is low. Out of range warning z When a handset is being off-hook and it is too far away from a base station, an out of range warning tone can be heard and handset will go to on hook. In idle mode, the range out tone will be heard every 30 seconds. z If user switches off the range out warning tone through menu tones item, the tone will be off. Battery charging z When a handset is initially started up (reloading the batteries or charging up from empty batteries), the battery will be fast charged for 3 hours. z During a normal usage scenario, when a handset is used and is put on cradle, the battery will be fast charged for at about 15 minutes. z If the battery level reaches 2 bars, the system will charge for 3 hours. z While the battery is being charged, the following animation on the battery icon can be seen.](https://usermanual.wiki/Giant-Telecom/A2510/User-Guide-604446-Page-14.png)
![14 z After the charging period, the software will stop the fast charge cycle and the battery icon will be shown as full steadily. z An empty battery has to be charged for about 14 hours in order to reach maximum capacity. Paging function z If the page key is pressed on base during standby mode, base will beep once and the handset will output the paging tone. ‘PAGING’ message will be shown on LCD; P A G I N G z Pressing the page key or any key on handset can stop the page tone and page display. 5 Menu functions General description z The menu can only be accessed when the handset is in standby mode. z All individual functions are listed in the form of a menu. z Pressing [Menu / ] to enter the menu and the first selectable item can be seen. z For example the first selectable item in menu is shown; 1 - C A L L L O G z The next item can be chosen by pressing [/] or [Menu/ ] until the desired item is shown on the display. User may then press [INT /OK] to confirm the selection. z Alternatively, a user may also press an index digit for the desired item to directly select that item. z At any stage of menu function, user may like to go one level up by pressing [C] or press and hold [C] to completely leave the menu. z At any stage, user may like to connect to the base immediately by pressing [ ]. z For the sake of convenience, a list of selectable options will be shown as following, although only one item will be actually displayed on the LCD. E N G L I S H P O R T U G U E S E S P A N I S H z The previous selection will always be shown first and users can change the selection by pressing [ / ] or [Menu/ ]. Users may like to press [INT /OK] to confirm the selection or cancel the selection and go back on level up by pressing [C]. z Handset can exit from menu mode after no key pressing for 20 seconds.](https://usermanual.wiki/Giant-Telecom/A2510/User-Guide-604446-Page-15.png)
![16 1 - E N G L I S H 2 - P O R T U G U E S E 3 - S P A N I S H Browsing phone book z See “Recalling a number from the phone book directory” for details. Storing number into the phone book z There are two ways to store a number into the phone book directory. z The first way is to choose ‘STORE’ from the menu to create a new phone book entry. z After selection, users will be prompted to enter the name first. N A ME : z After the first pressing, the entering display will appear and the letter will blink once for 1 second, during this 1 second, the character (listed in the following table) can be entered by pressing a digit ‘1’ to ‘0’ for different times within 1 seconds. z After one second of no key press or another digit key is pressed, the cursor will be advanced by one step as shown, and blink to indicate the current entering position. P _ z Press [C] to delete the current digit or press [INT /OK] to complete the name entering procedure. z Name and number cannot be empty. z User may enter a name of up to 10 characters. During name entering, user may press [C] to clear the last input character. Press [INT /OK] to confirm the name entered. If no character is entered but press [INT /OK] to confirm, a warning tone will prompt. z After entering the name and confirm, number entry will prompt. N U MB E R : z A user may enter a number of up to 16 digits. During number entry, the user may press [C] to clear the last input digit. 1 2 3 _ z Press [INT/OK] to complete the number entry and also the procedure of storing an entry in the phone book. A confirm tone will be heard and the storing can be continued one by one. z The second way to store a number is to copy the call ID number from the call log. The detail of the operation will be described in the section ‘Caller ID operation’.](https://usermanual.wiki/Giant-Telecom/A2510/User-Guide-604446-Page-17.png)
![17z If the phone book is full before storing a new entry, an error message will be displayed and an error tone can be heard. P B F U L L z The error message will be shown for 2 second before reverting to the up level menu. Edit an entry in the phone book z After selecting ‘EDIT’, the first item on the sorted list will be shown. Similar to recalling a number from the phone book, user has to choose an entry to edit. z After pressing [INT /OK], the stored name will be appeared for change followed by the number. The rest of the procedure is the same as storing a number in the phone book. Deleting entries in the phone book z After selecting ‘DELETE’, a user can select the entry to be deleted. z Press [INT/OK] and then that entry will be removed. z To delete all the phone book memory, choose ‘DELETE ALL’ from the menu. z Confirmation will be required for deleting all entries. C O N F I R M? z Press [INT/OK] to confirm the delete procedure or press [C] to cancel. Set distinctive melody for phone book entry z After selecting ‘MELODY’, user can select a melody for phone book entries. Similar to editing a number from the phone book, user has to choose an entry to set. z Press [INT/OK] and then the melody for that entry will be heard. If no distinctive melody is set to it, the default melody same as the common one set in Ext Ring will be assigned. (See the section of changing handset ring tone) z The selected ring tone will be heard if the caller ID match with the number for the entry during incoming call. z Press [R/] to view phonebook entries, if the entry is set to a distinctive melody, a ‘#’ will indicate before the entry name. □ F R A N K Changing handset ring tone z To change the handset ringer volume, choose ‘Volume’ under ‘Handset’. z It is allowed to change the volume from 0 to 5 levels and the ring tone for external call can be heard at the same time.](https://usermanual.wiki/Giant-Telecom/A2510/User-Guide-604446-Page-18.png)
![18 [ □ □ □ ] z If level 0 is selected, the ‘No Ring’ icon will be shown as well. [ ] z To change the melody, choose either ‘EXT Ring’ or ‘INT Ring’ for external or internal incoming call. ME L O D Y 1 0 z 10 normal ring tone melodies can be selected. z Users may change the ring melody by pressing [Menu/ ] or [ / ]. z The selected melody tone can be heard during selection. Changing the name for the handset z Users can change the handset’s name displayed during standby by choosing ‘HS NAME’ from the menu. z If the handset name has been stored, the name will be displayed and the user can change it. Setting tones on/off z There are 4 kinds of tone can be set to on or off: key tone, confirm tone (including error tone), low battery tone and range out tone. z The key beep tone can be set to on or off by selecting ‘KEY’ from the menu ‘TONES’. The previous setting ‘On/Off’ can be seen. O N O F F z Choose the desired setting and then press [INT/OK]. z The other tones can be set as key tone. Setting auto answer mode on/off z The auto answer function can be set to on or off by selecting ‘Auto Ans’ from the menu. Similar to setting key beep on/off, the previous on/off setting will be shown after selection. z Choose the desired setting and then press [INT/OK]. Setting call timer on/off z The call timer display during a call can be set to on or off by selecting ‘Timer’. Similar to setting key beep on/off, the previous on/off setting will be shown after selection. z Choose the desired setting and then press [INT/OK].](https://usermanual.wiki/Giant-Telecom/A2510/User-Guide-604446-Page-19.png)
![19Reset Handset Default setting z By choosing ‘Default’ under ‘Handset’, user will be asked to confirm the resetting procedure. C O N F I R M? z Once confirmed, all the handset setting parameters will be reset to default values. Registration z To register a handset to a base station, the base has to be ready for registration. The base will be ready for registration for 2 minute when a page key is pressed and hold for 3 seconds. z After selecting ‘REGSTER’, the handset starts searching for a base station that is available for registration. The ‘Aerial’ icon starts flashing. S E A R C H I N G z If success, the registration procedure will be completed with a confirm tone. If fail, after 60 seconds, the registration procedure will be exited with an error tone. Change DTMF/Pulse Dialing z The DTMF or pulse dialing mode can be selected by choosing ‘Dial Mode’ from the base setting menu. z After selecting, the current dial mode is shown; D T MF P U L S E z Press [ /] or [Menu/ ] to select DTMF or pulse dial mode. Press [INT / OK] to confirm or press [C] to abort. De-registration z One of the registered handset is able to remove the registration of another handset. z Select ‘DEREG HS’ from the menu, user will be asked to enter the handset number to be deleted D E R E G : ? z For safety purpose, a handset cannot delete itself. So, the handset number is shown for other handset. In case that there is only one handset registered, the de-registration procedure will be aborted. z Press [INT/OK] to proceed. That handset will no longer be able to access the base. The ‘Aerial’ icon will disappear and ‘NOT RGSTRD’ will appear as shown.](https://usermanual.wiki/Giant-Telecom/A2510/User-Guide-604446-Page-20.png)
![20 N O T R G S T R D Reset Base Default setting z Similar to the resetting procedure for handset, confirmation will be required. z Once confirmed, all the base setting parameters will be reset to factory setting. Change Language z Select ‘Language’ from the manual and the user will be prompted to change the display language. z A total of 3 languages can be selected. E N G L I S H P O R T U G U E S E S P A N I S H z Press [Menu/ ] or [ /] to select the desired language. Press [INT/ OK] to confirm or press [C] to abort. 6 Caller ID operation Incoming call indication z If the network provider sends out CLIP information, some information will be shown z Sometimes, the service provider does not send out the number but provide reason of absence. The following table summarizes what will be shown on the LCD for different cases. FSK caller ID Reason = ‘P’ B L O C K E D Reason = ‘O’ U N K N O W N Reason = others z The supported CID displays include: number absence, number, name absence, name, msg indication, long distance indication; z The display sequences/priorities are as following, 1. (number absence): show number absence B L O C K E D 2. (no number absence)+(number)+(matched in phonebook)+(long distance indication): ‘L’+’ ‘+phonebook name EXT](https://usermanual.wiki/Giant-Telecom/A2510/User-Guide-604446-Page-21.png)
![2315. (no number absence)+(no number)+(no name)+(no name absence)+(no msg indication)+(no long distance indication): z Press [Menu/ ] to view the rest of the number/name if the number/name is longer than 12/10 digits. 9 5 6 7 1 3 4 4 6 7 8 9 z If the number is longer than 16 digits, only the first 16 digits are stored. z If a call with CLI information remained unanswered after the call is gone for 3 seconds, the handset and base will go back to standby mode. The ‘CLI’ icon will be on and the number of unread caller ID number will be shown as follows. 0 3 N E W C A L L S Call log management z There are 20 calls log memories for storing the caller’s number and the date-time information. If the caller’s name and the date-time information are not available, only the caller number will be stored. z There are 3 kinds of call log entries: UNREAD, MISSED and RECEIVED. z If an incoming call with CLI is missed, at first it will be stored in UNREAD category before user read it. Unread call log deletion is forbidden, unless user delete all call logs. After user read it, it will be removed from UNREAD category to MISSED category. Then it can be saved to phone book or deleted one by one. z If an incoming call with CLI is accepted, the caller information will still be stored in the call log but it will becomes as RECEIVED call. z The caller number and name will be arranged in the call log such that the latest received call information will be stored in the first location. z Every CLI comes in with the same number will be considered as an independent one. The same CLI number received will replace the other one. z If all the call log locations are occupied, further reception of caller information will displace the earliest ‘received’ call. In case that there is no RECEIVED call is left, the earliest MISSED (or UNREAD) call information will be displaced. z Apart from the number that can be stored, some ‘Absent reason’ will also be stored in the call log. Message Waiting management z Two kinds of message waiting are considered: VWMI ON and VWMI OFF. z Message waiting management is independent of call log. z Only one flag is for message waiting: MSG LED on handset is flashing or not flashing to indicate message waiting or no message waiting exist z Any type of CID with VWMI ON to activate MSG LED flashing, whereas any type of CID with EXT EXT](https://usermanual.wiki/Giant-Telecom/A2510/User-Guide-604446-Page-24.png)
![24VWMI OFF to deactivate it. z User can clear message waiting manually thru ‘CLEAR MSG’ under ‘CALL LOG’ menu Off-Hook caller ID indication z When the handset is connecting with the external line, caller ID can also be indicated if off-hook caller ID signal is detected from the telephone. The caller’s number will be shown for 15 seconds. z The caller’s number will be saved to the call log and the entry will become as unread call. Reviewing caller ID number z The previous caller ID information can be read by choosing ‘Call Log’ from the menu. z Alternatively, users can press the [ /] key during standby to view the unread call. z If there is no unread caller ID information, the following screen can be seen for 2 seconds before reverting back to standby mode. E MP T Y z If there is caller ID information, the most recently received caller’s number will be shown first. If the call information has not been read before, the ‘CLI’ icon will be on. z After the unread caller ID is read, it will become missed call and be removed from unread list. z Phone book number matching will be performed on the caller number in call log as well. If there is a match, the name of the caller for that entry will be firstly shown. 0 1 - K E N N E T H z If the name has more than 9 characters, the rest of the name will be omitted. Press [Menu/ ] or view the number or name in the next row. 0 1 - 1 2 4 5 6 7 8 2 3 z Besides ‘0’-‘9’, only‘*’ and ‘#’ could be displayed in the number field. z Apart from the number can be stored, some ‘Absent reason’ will also be stored in the call log. Please see the examples below. 0 1 - B L O C K E D 0 2 - 1 1 2 5 6 6 8 0 3 - U N K N O WN 0 4 - J O H N 0 5 -](https://usermanual.wiki/Giant-Telecom/A2510/User-Guide-604446-Page-25.png)
![25z Press [Menu/ ] or [ /] to view the next or previous caller ID information. z If the caller information for an entry has been read before, the ‘CLI’ icon will not appear. 0 3 - 2 6 7 8 1 3 4 5 7 z If the caller’s number is too long to be seen at once, pressing [Menu/ ] will show the unseen content on the right. z If date-time information is available, user may press [Menu/ ] to view the date-time information (MM/DD hh:mm , 24 hour) located at the end of the current call log entry. MM/ D D h h : m m Operation on call log z To operate the caller ID number from call log, choose ‘CALL LOG’ to enter the call log first. z During viewing any type of call log, press [ ] and the viewed number will be dialed out. z During viewing ‘missed’ or ‘received’ caller ID, Press [INT / OK] to operate it. Two kinds of operations are provided as shown. D E L E T E S A V E z Then, user could browse a sub-menu by pressing [Menu/ ] or [ /]. Press [INT / OK] to execute the selected operation. z If ‘DELETE’ is selected, after a confirm tone, the next entry will come out. If no entry is to be deleted, LCD shows ‘EMPTY’ and then returns to up level menu after 2 seconds. z If ‘SAVE’ is selected, if phone book space is full, a warning tone will be heard with the below display and then returns to up level menu after 2 seconds. P B F U L L z If phone book space is not full, the selected call log entry will be saved to phone book as shown. S T O R E D z If the current call log entry match phone book, it can’t be saved to phone book with prompt of](https://usermanual.wiki/Giant-Telecom/A2510/User-Guide-604446-Page-26.png)
![26‘EXISTED’. If try to save some call logs without number, it will show ‘INVALID’. z If the current call log entry does not match phone book and it has no name, the name field will be filled with ‘CID NAME’. z To delete all call log (including unread type), user can select ‘DELETE ALL’ in the call log menu. Further confirmation is necessary before the operation. z Saving the caller’s number is only possible if a matched entry is not found in the phone book. Dial back on call log z To operate the caller ID number from call log, choose ‘CALL LOG’ to enter the call log first. z During viewing any type of call log, press [0-9] to add digits before CID number. Press [#] to cancel all additive digits. z If number of digits is more than 6, always allow to press # to truncate the leftmost digit of the CID. z If number of digits is less than 16, always allow to press 0 - 9 to insert digits 0 - 9 correspondingly to the left of the 1st digit of the CID. z Insert follow truncate shall copy original cid record to the display. Truncate follow insert is allowed. z The amended CID do not save in the CID log, and press CID up or down button to recover to the original stored CID number . 7 Technical Specifications Open Field Range*: Typical 300m Indoor Range*: Typical 50m Handset Operating Time: (average values**) Approx. 6 hours talk time Approx. 70 hours standby Handset Weight: Approx. 115g AC/DC Adapter: Switching mode / VDE / Dual Input : DSA-5P-05 FEU 060035 / 3515-0635-ADC / D060035DU Input: 100-240V AC, 50/60Hz / 230 V AC, 50Hz / 110/220 V AC, 50/60 Hz Output: 6 V AC, 350mA AC/DC Adapter: (for Handset charging) Switching mode / VDE / Dual Input : DSA-5P-05 FEU 060015 / VD060015D / D060015DU Input: 100-240V AC, 50/60Hz / 230V AC, 50Hz / 110/220 V AC, 50/60 Hz Output: 6 V AC, 150mA Rechargeable Battery: SN-AAA60HJ or equivalent (Ni-MH, 1.2V, 600mAh) Operating Temperature: 0 to 45 °C * Value may vary according to environment. ** For guidance only, depends on initial battery charge. 8 Troubleshooting Tips Caller ID Solutions No Display z Is battery fully charged? Charge the battery for 12 hours or replace the battery. Make sure the battery is properly installed and connected.](https://usermanual.wiki/Giant-Telecom/A2510/User-Guide-604446-Page-27.png)
