Page 2 - Table of Contents
2 Table of Contents 1 Introduction ........................................................................................................................... 5 1.1 Package Contents .......................................................................................................... 5 1.2 Featu...
Page 5 - Introduction; Package Contents
5 1 Introduction 1.1 Package Contents Thank you for purchasing the Cortelco 2757 Voice over Internet Protocol (VoIP) phone. The following items should be packed with the 2757. Please contact your dealer if any of them is missing. 2757 Phone (Main Body) 1 pcs Handset 1 pcs Handset Cable 1 pcs Network...
Page 8 - Network Setup; Static IP Address
8 2 Network Setup 2.1 Static IP Address 1. Press ‘Menu’ 2. Press ‘Up’ or ‘Down’ until ‘3. Settings’ is highlighted, then press ‘Select’. 3. Press ‘Up’ or ‘Down’ until ‘4. System Configuration’ is selected, then press ‘Select’.
Page 17 - Display IP Address
17 7. To reboot the 2757, press ‘Down’ to move to ’21. Reboot System’, and press ‘Select’. ‘Rebooting’ will appear on the LCD screen. After the reboot is completed, the 2757 is ready for use. 2.4 Network Setup (Web Configuration) You can also configure the network by using a web browser. In order to...
Page 18 - Web Interface Network Configuration
18 3. Press ‘Up’ or ‘Down’ until ‘5. Model Information’ is selected, then press ‘Select’. 4. Press ‘Up’ or ‘Down’ until ‘4. IP Address is highlighted. Make a note of the IP address, and then press ‘Exit’ three times to return to the main menu. 2.4.2 Web Interface Network Configuration 1. Use a web b...
Page 21 - SIP Server Information Setup
21 2.5 SIP Server Information Setup After the network setup is completed, the SIP server information must be entered. 1. Press ‘Menu’ 2. Press ‘Up’ or ‘Down’ until ‘3. Settings’ is selected, then press ‘Select’. 3. Press ‘Up’ or ‘Down’ until ‘4. System Configuration’ is selected, then press ‘Select’...
Page 27 - Accepting and Making Phone Calls; Accepting phone calls
27 2.7 Accepting and Making Phone Calls After completing the network and SIP settings, you can use the 2757 to make and accept phone calls. 2.7.1 Accepting phone calls Before you can receive phone calls, your phone must be registered to a SIP server. You will see the message below on the LCD screen ...
Page 29 - Attended Transfer
29 The call is now on hold. You will hear dial tone again. The remote party will hear music if the phone or server is configured to deliver it. There are two types of call transfer – Attended and Blind. In an Attended transfer the party initiating the transfer remains connected until the transfer is...
Page 30 - Blind Transfer
30 2.7.2.1.2 Blind Transfer To perform a blind transfer, dial the asterisk key ‘ * ’ after dialing the phone number for the transfer. You will see the following message displayed on the LCD screen: At this point, the call will be transferred. If a blind transfer fails, the call cannot be retrieved. ...
Page 33 - Caller ID on Call Waiting
33 2.8 Caller ID on Call Waiting The 2757 supports Caller ID on Call Waiting. With this service, the 2757 will notify you if you receive a second call while you are on the phone. It will also display the number of the second call. Please note that this service must be provided by your ISP or VoIP PB...
Page 35 - Placed Calls
35 2.9.1 Missed Calls All unanswered calls will be listed here. You can use ‘Up’ and ‘Down’ to move in this list. Press ‘Dial’ to call the number selected, press ‘Delete’ to delete a selected entry, or press ‘Exit’ to return to previous menu. 2.9.2 Received Calls All accepted phone calls are listed ...
Page 36 - Speakerphone and Headset; Placing Calls
36 2.10 Call Rejection (DND) Do Not Disturb (DND) can be used to avoid phone calls. To activate DND, press ‘DND’. The icon will be displayed on the LCD screen. When DND is activated, callers will hear busy tone or a voice mail message if voice mail is available. A DND forward number may also be set ...
Page 37 - Speed Dial & Advanced Phone Configuration
37 2.11.2 Headset To use a headset, insert the headset plug into the headset jack of the 2757 as shown below. After the headset is connected, press ‘HEADSET’ to make and receive calls. 3 Speed Dial & Advanced Phone Configuration 3.1 Speed Dial The 2757 has 5 speed dial buttons. A phone number ma...
Page 38 - Busy; DND; Advanced Settings; Inter Digit Time
38 2. Numbers can now be entered in the spaces for Speed Dial 1 – 5. Only numbers may be placed in these spaces. To save the settings, press ‘Submit’ on the bottom of the webpage. 3.2 Call Forwarding The 2757 supports three methods of call forwarding. These numbers may also be entered on this web pa...
Page 40 - Entry of Call Forward numbers from phone
40 3.3.12 Set Time Zone The 2757 supports time zones based on GMT. 3.3.13 NTP Server Address The 2757 keeps time based on signals from a Network Time Protocol (NTP) server. Enter a valid NTP server address here. 3.4 Entry of Call Forward numbers from phone Call forwarding numbers can also be set fro...
Page 41 - Phone Book Management; Web Interface
41 3. Press ‘Down’ to highlight the desired type of call forward. Press ‘Select’. 4. Enter the number using the keypad. Press ‘Save’ to save changes. Press ‘Clear’ to erase a number, or press ‘Cancel’ to keep the original number unchanged. 3.5 Phone Book Management 3.5.1 Web Interface The web interf...
Page 42 - Phone Interface
42 2. Phone book entries will be displayed on this page, and new names and numbers may be entered. After entering the number and the name, press ‘Add’ to save the entry. To delete an existing entry, enter the phone number in the ‘Number’ field, and then press ‘Delete’. 3.5.2 Phone Interface Existing...
Page 44 - Browse System Information; LCD screen
44 6. To delete all phone book entries press ‘DelAll’ when the phone book entries are displayed. You will be prompted to press 1 or 2 key (1 for YES and 2 for NO). 3.6 Browse System Information System information (IP address, model information, firmware version…etc.) can be displayed using either th...
Page 47 - Change Display Language
47 3.7 Change Display Language The default language of the 2757 is English. However, it can be changed to Chinese. 1. Press ‘Menu’ 2. Press ‘Up’ or ‘Down’ until ‘3. Settings’ is selected, then press ‘Select’. 3. ‘1. Language’ should be selected when this menu is entered. If not, use ‘Up’ or ‘Down’ t...
Page 48 - Change Ringer Type
48 4. All available languages will be displayed here. A ‘V’ sign will appear on the currently selected language. Use ‘Up’ or ‘Down’ to select the desired language, and press ‘Select’. Press ‘Exit’ to leave this menu without making any changes. 3.8 Change Ringer Type Ring tones can be changed from th...
Page 49 - Adjust the Contrast of LCD Screen
49 3. Press ‘Up’ or ‘Down’ until ‘2. Ring Type’ is selected, then press ‘Select’. 4. All available ring tones will be listed here. Use ‘Up’, ‘Down’, and ‘Select’ key to choose a ring tone. Press ‘Exit’ to return to the previous menu after making a selection. A ‘V’ will appear on the currently select...
Page 51 - Reboot the IP Phone
51 3.10 Reboot the IP Phone 3.10.1 Phone Interface 1. Press ‘Menu’ 2. Press ‘Up’ or ‘Down’ until ‘3. Settings’ is selected, then press ‘Select’. 3. Press ‘Up’ or ‘Down’ until ‘4. System Configuration’ is selected, then press ‘Select’.
Page 53 - Factory Reset
53 2. Click the ‘System Restart’ tab, then click the ‘RESTART’ button. The web page will display ‘Phone is restarting !!’ The 2757 will be ready again in approximately 1 minute. 3.11 Factory Reset All stored settings can be erased by resetting the 2757 to factory defaults. 3.11.1 Phone Interface 1. ...
Page 55 - Change Password for the Web Interface
55 2. Click ‘Configuration commit / Reset’ tab. Then click ‘RESET’ button to reset to defaults. To complete the reset, click ‘COMMIT’ button and reboot the phone. 3.12 Change Password for the Web Interface The web login password can be changed. Connect to the 2757 with the web interface then follow ...
Page 56 - Troubleshooting
56 4 Troubleshooting If your 2757 is not working properly, please check this troubleshooting checklist. Scenario / Problem Solution Nothing is displayed on LCD screen Is the AC adapter plugged into an electrical outlet? Is the AC adapter connected to the 2757? If using PoE, check the PoE switch and ...
Page 57 - Firmware Update; Upgrade Procedure
57 5 Firmware Update 5.1 Upgrade Procedure The system software used by the 2757 can be updated when a newer version is available. Please go to www.cortelco.com to check for a new version of firmware. The following information will be needed to upgrade: • TFTP/FTP server address • Image file name • u...
Page 58 - Recover from Unsuccessful Firmware Update
58 2. Enter the upgrade server (TFTP or FTP) address. Select the server type (TFTP or FTP). Enter the upgrade filename, username, and password on this page. Note that TFTP does not require a username or password. Then press ‘SAVE’. After the information is saved, press ‘UPGRADE’, the IP Phone will c...
