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IMPORTANT SAFETY INSTRUCTIONS 

 

 

This symbol is to alert you the important operating or servicing instructions that may appear in your 
owner’s manual.  Always follow basic safety precautions when using this product to reduce the risk of 
injury, fire or electric shock. 

 

 

 

When using your telephone equipment, basic safety precautions should always be followed to reduce the risk of fire or electric shock 
including the following: 
1. 

Read and understand all instructions. 

2. 

Follow all warnings and instructions marked on the product.  

3. 

Unplug this product from the wall outlet before cleaning. Do not use liquid or aerosol cleaners. Use a damp cloth for cleaning. 

4. 

Do not use this product near water, for example, near a bathtub, washbowl, kitchen sink, or laundry tub, in a wet basement, or near 
a swimming pool. 

5. 

Do not place this product on an unstable cart, stand, or table. The product may fall, causing serious damage to the product. 

6.  Slots and openings in the enclosure and the back or bottom are provided for ventilation to prevent overheating. These openings 

must not be blocked or covered. The openings should never be blocked by placing the product on a bed, sofa, rug, or other similar 
surface. This product should never be placed near or over a radiator or heat register. This product should not be placed in a built-in 
installation unless proper ventilation is provided. 

7. 

This product should be operated only from the type of power source indicated on the marking label. If you are not sure of the type of 
power supply to your home, consult your dealer or local power company. 

8. 

Do not allow anything to rest on the power cord. Do not locate this product where the cord will be abused by persons walking on it. 

9. 

Do not overload wall outlets and extension cords as this can result in the risk of fire or electric shock. 

10.  Never push objects of any kind into this product through enclosure slots as they may touch voltage points or short out parts that 

could result in a risk of fire or electric shock, Never spill liquid of any kind on the product. 

11.

 

Do not disassemble this product; take it to a qualified service technician or service center when repair work is required. Opening or 
removing covers may expose you to voltage or other risks. Incorrect reassembly can cause electric shock when the appliance is 
subsequently used. 

12.  Unplug this product from the wall outlet and refer to qualified service personnel under the following conditions: 

A.  When the power supply cord or plug is damaged or frayed. 
B.  If liquid has been spilled into the product. 
C.  If the product has been exposed to rain or water. 
D.  If the product does not operate normally by following the operating instructions. Adjust only those controls that are covered by 

the operating instructions. Improper adjustment of other controls may result in damage and may require extensive work by a 
qualified technician to restore the product to normal operation. 

E.  If the product has been dropped or the enclosure has been damaged. 
F. 

If the product exhibits a distinct change in performance. 

13.  Avoid using a telephone during an electrical storm. There may be a remote risk of electric shock from lightning. 
14.  Do not use the telephone to report a gas leak in the vicinity of a leak. 
15.  Never install telephone wiring during a lightning storm. 
16.  Never install telephone jacks in wet locations unless the jack is specifically designed for wet locations. 
17.  Never touch un-insulated telephone wires or terminals unless the telephone line has been disconnected at the network interface. 
18.  Use caution when installing or modifying telephone lines. 

 

SAVE THESE INSTRUCTIONS  

Summary of Contents for Sentry 8790

Page 1: ...OPERATING INSTRUCTIONS SUBSCRIPTION TO CALLER ID WITH CALL WAITING SERVICE FROM YOUR LOCAL TELEPHONE COMPANY IS REQUIRED FOR ALL CALLER ID FEATURES TO OPERATE CORRECTLY PLEASE READ AND FOLLOW THIS MANUAL BEFORE USING YOUR TELEPHONE AND KEEP IT FOR FUTURE REFERENCE ...

Page 2: ...not overload wall outlets and extension cords as this can result in the risk of fire or electric shock 10 Never push objects of any kind into this product through enclosure slots as they may touch voltage points or short out parts that could result in a risk of fire or electric shock Never spill liquid of any kind on the product 11 Do not disassemble this product take it to a qualified service tec...

Page 3: ...tions to the telephone network must be made through standard plugs telephone company provided jacks or equivalent in such a manner as to allow for easy and immediate disconnection of the terminal equipment Standard jacks should be so arranged that if the connected plug is withdrawn no interference to the operation of the equipment at the customer s premises which remains connected to the telephone...

Page 4: ...compatible with the telephone company facilities the customer shall be given adequate notice to make modifications to maintain uninterrupted service GENERAL The FCC prohibits customer provided terminal equipment to be connected to party lines or to be used in conjunction with a coin telephone service INSTALLATION The device is equipped with a USOC RJ11C standard miniature modular jack and is desig...

Page 5: ...ion to eyes or skin 6 All batteries should be replaced at the same time Mixing fresh and discharged batteries could increase internal cell pressure and rupture the discharged batteries 7 When inserting batteries into this product the proper polarity or direction must be observed Reversed insertion of batteries can cause charging which may result in leakage and explosion 8 Remove the batteries from...

Page 6: ...d on your line There will be an extra charge added to your monthly telephone bill for this service Please consult with your local telephone company for the Caller ID service charge 1 The Caller ID function can be used to screen unwanted calls eliminate harassment from annoying calls or to return missed calls using the displayed speed dial feature 2 When used with Caller ID service the unit display...

Page 7: ... 13 Speaker Volume Control Adjusts volume of Speakerphone 14 Handset Volume Control Adjusts volume of the handset receiver from low to high LO HI 15 3 One Touch Speed Dial Memory Buttons To store numbers into memory M1 to M3 16 Call Back Button Calling back a number from the Caller ID Memory 17 New Call LED indicator Flashes when new calls have been received 18 LCD Panel Display caller s name tele...

Page 8: ...and Spanish as desired Default to English Caller ID with call waiting and call waiting icon Delete button allows call records to be deleted individually or collectively Programmable area code and long distance code Real time clock Recall a number from the caller ID memory Set date and time in setup manual o Telephone Features 3 one touch 24 digits memory each and 10 two touch 24 digits memory each...

Page 9: ...Also remove the batteries from inside the battery compartment Figure 1 B Installing the Batteries 1 Unscrew and open the battery cover located on the bottom of the base Please note this construction is for compliance with safety regulations Install the batteries according to Figure 2 IMPORTANT Be sure that the batteries are installed correctly Wrong polarity may damage the unit Figure 2 2 For bett...

Page 10: ...e from your local telephone company or from an electronic and hardware retailer If you have the older style 4 pin jacks adaptors are available to convert them to modular style jacks Desktop Usage 1 Attach the supplied Desk Wall Mount Bracket onto the bottom of the telephone as shown below if you want to change the angle of the display NOTE Arrow signs are printed both on the Desk Wall Mount Bracke...

Page 11: ...place 5 Put your phone over the wall plate make sure both studs fit into the slots on the bottom of the Base Then slide base down firmly onto the wall plate See Figure 6 6 Reverse the Handset Hanger as shown in Figure 7 Figure 7 Figure 6 B If your house is not equipped with a modular wall plate 1 Determine the desired position on the wall 54 above the floor is suggested Mark the wall at the desire...

Page 12: ...panish or French Default is English Press menu to confirm and exit to set area code E S F Setting the Long Distance Code 1 Users located in the United States and Canada are required to select 1 as their long distance code 2 This option allows you to enter a long distance code of 1 digit 0 9 or none only 3 When in this option the display shows long distance code in the dot array and the previous se...

Page 13: ...becomes 246 and 2 is flashing You may continue to change the code or press Menu to save the area code 246 and enter the set long distance mode 4 If you want to delete the area code setting press Delete when you first enter the setting menu that is when the first digit is flashing Press Menu to save and enter set long distance code Set Time Display shows the time date and ENTER HOUR The tens hour i...

Page 14: ...eceived a pulse of abnormal voltage from the phone line To reset the product simply uninstall all batteries and unplug the AC adaptor from this product Wait for at least 5 minutes before reinstalling the batteries and then the AC adaptor NOTE All stored data will be lost when the unit is reset Please write down any important numbers before resetting the phone ...

Page 15: ... answer calls handsfree The call timer will appear in the LCD panel To make an outgoing call 1 Press the Speakerphone Button and the Speaker Indicator will light 2 When you hear the dial tone tap out the phone number you are calling using keys 1 to 9 and 0 or recall the number from memory 3 When you hear your party answer you can carry on a conversation without picking up the handset Adjust the vo...

Page 16: ...sition during conversation The Hi Lo switch is located on the right side of the base Call Timer A call timer TIMER 00 00 is displayed to count the total off hook time in minutes and seconds The timer starts to count 6 seconds after the phone goes off hook to make dialing It starts counting immediately when the phone goes off hook to answer a call Flash will reset call timer Receiving Calls When th...

Page 17: ...aled Number In idle state press Redial Pause to view the last dialed number Press Delete once and then exit to idle state Temporary Tone Dialing Temporary tone dialing is used only when you have Pulse rotary service It allows you access to services that require tone signaling including some Tone Activated Computer Systems or phone banking To change from Pulse rotary to Tone dialing during a call d...

Page 18: ...e phone will exit to view Callers List state Press Menu or wait 12 sec to exit to idle state To save a number into two touch memory key 0 9 In idle state press PROG Display shows ENTER NUMBER Enter the number using the dial pad If you require a pause press Redial where you want the pause Press MEM and display shows SAVED TO Press one of the 10 keys on the dial pad And the phone will exits to idle ...

Page 19: ...LER ID OPERATION Using the Callers List The Caller s List list the last 60 caller s records by caller s sequence Calls from the same telephone number will not be combined Answered call is not treated as NEW The telephone display will indicate when there are new callers When the Callers List is full new callers are added to the list and the oldest callers are deleted To view the Callers List In idl...

Page 20: ...sing Handsfree For example if the number is 123 4567 Press PROG and the number will be displayed as 1234567 left adjusted Digit 1 will be flashing Press 8 5 and 2 in sequence The displayed number will be 81234567 then 851234567 and then 8521234567 and digit 1 remains flashing Press Delete The displayed number becomes 852234567 and digit 2 will be flashing To edit a number in the Callers List and s...

Page 21: ...w incoming call Blocked or Unavailable Calls 1 If the caller s telephone number is blocked that is the caller wishes to keep his telephone number private the display will show PRIVATE in place of the caller s name 2 If the call is international or from an area where Caller ID service is not available the display will show OUT OF AREA in place of the caller s name 3 Calls from a Cellular phone will...

Page 22: ...ing all batteries or unplugging the AC adaptor Wait for 5 minutes before reinstalling the batteries or plugging the AC Adaptor This will also clear all memories The display is faded Numbers are hard to see Is the AC adapter connected If batteries are used are the batteries fresh Change all 3 batteries Replace all 3 batteries at the same time Cannot store numbers into memory Is the AC adapter conne...

Page 23: ...Delete Button for at least 5 seconds after you view all new calls Caller ID displays in the wrong language Reset the language by pressing the Menu Button and then the Redial Button until E S F shown on the display and press theÀ Down Button to confirm The language will be set to English mode Memory Dialing does not work Check the phone if you have programmed the numbers correctly by pressing that ...

Page 24: ...nes installed in your home check to see if they are working If they are try using your telephone on another outlet If it still doesn t work it is more than likely that there is a problem with your telephone In this case return the unit for service in accordance with the instructions on your warranty card DO NOT CALL THE TELEPHONE COMPANY SINCE YOU MAY BE RESPONSIBLE FOR CHARGES FROM THEM CHARGES F...

Page 25: ...h the type of equipment of any particular phone company or the services provided by it CORTELCO DISCLAIMS ANY IMPLIED WARRANTY INCLUDING THE WARRANTY OF MERCHANTABILITY AND THE WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE AS OF THE DATE ONE YEAR FROM THE ORIGINAL PURCHASE OF THE PRODUCT CORTELCO ASSUMES NO RESPONSIBILITY FOR ANY SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES THIS WARRANTY GIVES YOU S...

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