The Aastra 6737 is a versatile IP phone designed for business environments. It features four independent lines, a speakerphone for hands‑free or headset use, and intuitive controls such as Goodbye to end calls, Hold to pause, and customizable options for services and settings. Ideal for small to medium teams.
Hardware Overview
The Aastra 6737 is a robust, ergonomic IP phone designed for business use. It features four independent line keys, a high‑resolution 2.4‑inch color LCD, and a speakerphone for hands‑free communication. The handset is made of durable ABS plastic with a soft‑touch finish, providing a comfortable grip. A 3.5‑mm headphone jack allows headset connectivity for private calls. The device supports PoE, has a built‑in surge protector, and includes a dedicated RJ‑45 port for network connectivity. Its firmware is upgradable via USB or network, ensuring compatibility with evolving VoIP protocols. The phone’s intuitive interface and comprehensive call management make it a reliable choice for any office environment. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit. All features are fully configurable!!!!
Initial Setup
The Aastra 6737 begins with a simple power‑on sequence. Connect the power cable, then plug the RJ‑45 network cable. The LED will flash green, indicating boot. Once the LCD displays the login screen, press the * key to access the setup menu, then follow the on‑screen prompts to configure your accountS and settings.
3.1 Powering On
To power the Aastra 6737, first connect the 12‑V DC adapter to the IEC inlet on the phone’s back. After plugging in, press the power button on the right side of the handset. The amber LED will flash, indicating the boot sequence has started. The LCD will display a series of icons, confirming that the firmware, network interface, and audio hardware are initializing correctly.
During the boot, the phone runs a self‑diagnostic routine. The LCD shows a series of icons: a telephone handset, a network symbol, and a clock. Each icon appears sequentially, confirming that the firmware, network interface, and audio hardware are functioning properly; If the LED stays amber for more than 30 seconds, the device will reset automatically.
Once the diagnostic completes, the screen displays the firmware version and network status. If the phone is connected via Ethernet, a green network icon appears; if using a wireless connection, the Wi‑Fi symbol lights up. At this point, the phone is ready for configuration. Press the * key to enter the main menu, then navigate to “System” > “Login” to set up your credentials.
For a quick start, the phone offers a “Quick Setup” wizard. By pressing the * key and selecting “Quick Setup,” the device will prompt for basic information such as the SIP server address, user ID, and password. After entering, the phone will register with the server and apply default line assignments. Firmware updates can be applied via the USB port, ensuring the phone remains current.
After configuration, test the audio path by making a call to a local number or using the “Call Test” feature under “Tools.” Verify that the speaker and microphone respond correctly, and adjust the volume using the dedicated buttons on the handset. Once all checks pass, the Aastra 6737 is ready for deployment in a business environment.
The phone supports speed dials, call parking, integration!.
Line Management
Line management on the Aastra 6737 allows you to assign up to four independent lines, configure speed dials, and set line priorities. Use the menu: System → Lines → Assign to map each line to a SIP account. You can also enable or disable individual lines for maintenance or testing. Set ring tones per line.
The Aastra 6737 supports up to four independent lines, each configurable via the phone’s menu or web interface. Lines can be assigned to separate SIP accounts, prioritized for incoming call routing, and customized with individual ring tones or speed dials. The front‑panel line buttons allow instant switching or call placement on a specific line, while the mute button offers quick privacy control. Proper line configuration ensures reliable registration with the VoIP server and efficient handling of simultaneous calls.
4.1 Assigning Lines
To assign a line on the Aastra 6737, press the Menu key, navigate to System → Lines → Assign. The phone displays four line slots (Line 1 to Line 4). Enter the SIP account details for each line: the Username, Password, and Server address. After entering the credentials, press Save to apply the configuration. The phone will register each line with the VoIP server and display a status icon. If a line fails to register, check the network connection and verify that the SIP credentials are correct. You can also set a priority for each line so that incoming calls are routed to the preferred line first. To change the priority, select the line, press Priority, and choose the desired order. Once the lines are assigned, you can use the Line buttons on the front panel to switch between active lines during a call or to place a call on a specific line. The Aastra 6737 supports simultaneous ringing on multiple lines; the phone will ring on all lines that are configured and not muted. To mute a line, press the Mute button on the line’s button. This feature is useful for managing busy lines or for privacy during a call. For advanced line management, the phone’s web interface can be accessed by entering the device’s IP address in a browser. From there, you can view detailed registration status, modify line settings, and perform firmware updates. Always ensure the phone’s firmware is up to date to avoid compatibility issues with the VoIP provider. By properly assigning and configuring lines, users can efficiently manage multiple extensions and maintain clear communication across the organization. Users can toggle line mute from front panel for control. Registration status now!
Call Features
The Aastra 6737 offers robust call features: hold, mute, transfer, conference, and call forwarding. Use the front‑panel buttons to manage calls, or navigate the menu for advanced options like speed dials and call recording. All features support multiple lines. Use speed dials for frequent contacts quickly today.
5;1 Call Forwarding
To forward calls on the Aastra 6737, press the Forward button on the front panel, then select the desired line. Choose from “Forward All” “Forward Busy” or “Forward No Answer.” Enter the destination number using the keypad or select a stored contact; Confirm by pressing OK. To disable forwarding, press Forward again and select “Disable.” Phone will display a confirmation message and status will update on screen. Call forwarding can be set per line, allowing you to route calls from line 1 to a mobile phone while keeping line 2 local. The feature supports both internal extensions and external numbers, and it works over the network as long as the phone remains registered. For advanced routing, use the web interface to specify time‑based rules or conditional forwarding. Ensure the destination number is reachable and that the network permits outbound calls to that number. If the destination does not answer, call returns to the original line after specified timeout. The Aastra 6737 logs forwarding activity in the call history, which can be reviewed from the History menu. This feature is ideal for mobile staff or for delegating calls during off‑hours.
To customize forwarding rules further, log into the phone’s web management portal, navigate to the “Call Forwarding” section, and set conditions such as caller ID filters. After saving, phone applies the new rules and logs change in the audit trail.
Audio Settings
The Aastra 6737 offers adjustable volume controls for speakerphone and headset. Use the Volume button to increase or decrease levels. Select Audio Mode to toggle between speakerphone, headset, or mute. Settings are saved auto and can be restored via the web interface now.
6.1 Volume Controls
The Aastra 6737 offers distinct volume controls for its speakerphone, headset, and internal speaker. The Volume button cycles through these modes, and each can be fine‑tuned by pressing the button repeatedly; the display shows a numerical value from 0 to 15. The internal speaker, used for system prompts and notifications, defaults to level 8 but can be adjusted similarly. To restore factory defaults, press the Volume button while holding the Goodbye key for 5 seconds; the phone will reset all audio levels to their original values. The volume setting is stored locally on the device, so changes remain even after a reboot or network disconnection. For remote adjustments, log into the phone’s web interface, navigate to the Audio section, and modify the Volume sliders. If a line is muted, the Volume button will not affect the line’s audio; you must unmute the line first. The phone also supports a Mute button that temporarily silences the speaker or headset while preserving the current volume setting. The phone’s hardware diagnostics can be accessed by pressing the Diagnostics button and selecting the Audio test; the results will indicate any hardware faults or misconfigurations that may affect volume performance. The phone’s volume controls are adjustable the web interface.
Advanced Configuration
The Aastra 6737 allows advanced configuration via its web interface, enabling SIP profiles, VLAN settings, and call routing. Users can set ring tones, voicemail URLs, and DTMF modes. Firmware updates are applied through the Update tab, keeping the device current. It supports via the portal now
7.1 Voicemail Integration
Integrating voicemail on the Aastra 6737 is straightforward yet powerful. Begin by accessing the phone’s web interface and navigating to the Voicemail configuration page. Here you will enter the SIP or IAX voicemail server address, port number, and the authentication credentials that correspond to the user’s mailbox. Once the server details are saved, the phone will automatically register and display a voicemail icon in the status bar, indicating that voicemail services are available. To access the mailbox, simply dial the voicemail access code—commonly 9 or 1—while on a line. The phone will prompt for the user’s voicemail PIN, which can be set or changed from the Security tab if it has not yet been configured. After entering the correct PIN, the user is presented with a menu that allows them to listen to messages, delete ones, or reply from the handset using the Reply button. The handset’s speakerphone or headset can be used for hands‑free listening, and the Hold function can pause playback if needed. For those who require notifications, the Voicemail Notifications feature can be enabled so that a short tone alerts the user whenever a message arrives. If the voicemail server supports forwarding, the Aastra 6737 can be configured to send voice mail to an email address, allowing messages to be delivered to a corporate mailbox or personal inbox. This is done by entering the email address in the Forwarding field on the voicemail configuration page. Advanced users may wish to upload custom greetings or adjust DTMF tone settings. The Advanced tab offers options to upload a greeting file (in WAV format) and to select the DTMF mode (rfc2833, inband, or outband) that best matches the server’s expectations. Additionally, the phone can store voicemail recordings locally on its SD card for temporary caching when the network is unavailable, ensuring that no messages are lost during outages. Finally, the Help menu on the phone provides quick access to troubleshooting steps for common voicemail issues, such as failed authentication, missing messages, or playback errors. By following the on‑screen prompts or consulting the online manual, users can resolve most problems without contacting support.
Troubleshooting
Common issues include no network signal, call routing errors. Check the Ethernet cable, verify IP settings, andupdate firmware. For audio problems, confirm speakerphone mode, adjust volume, and test headset connectivity. If calls fail, review line assignments and SIP credentials now!
8.1 Connectivity Issues
When the Aastra 6737 cannot register with the SIP server, begin by inspecting the physical link. Verify that the Ethernet cable is firmly seated in the RJ‑45 port and that the switch or router port is active. A loose cable or a disabled port will cause intermittent connectivity and call drops. If the port belongs to a VLAN, ensure the VLAN ID matches the configuration on the phone. Next, confirm the IP settings. The phone may use DHCP or a static address. With DHCP, check the server’s lease table; with static, double‑check the IP, subnet mask, gateway, and DNS entries for typos. Incorrect values will prevent the phone from reaching the SIP server. Examine the SIP credentials. The username, password, and domain must match those on the PBX or service provider. A common error is omitting the “@” symbol or using the wrong domain. The SIP port should be 5060 for UDP or 5061 for TLS; if TLS is required, the firmware must support it and the certificate chain must be valid. Firmware updates can resolve protocol incompatibilities. Use the web interface to view the current firmware version and compare it with the latest release. If an update is needed, download the package, upload it via the web interface, and reboot the phone; allow a few minutes for the firmware to initialize. Network latency and packet loss can also disrupt registration. Run a ping test from the phone’s web interface to the SIP server; a ping time over 200 ms or a loss rate above 1 % indicates congestion or cable problems. Replace the cable or test a different port if necessary. Finally, review the phone’s log files through the web interface or console. Look for error codes such as “SIP 404 Not Found” or “SIP 403 Forbidden” and cross‑reference them with the PBX logs to pinpoint authentication or routing issues. Once the root cause is identified, apply the fix—whether it’s correcting credentials, adjusting network settings, or updating firmware—and confirm that the phone registers and remains stable. Monitor the link!
Maintenance & Support
The Aastra 6737 requires routine checks to keep it running smoothly. Begin with a visual inspection: ensure the power supply is connected, LED status lights show normal operation, and the speaker and microphone are dust‑free. A clean environment reduces overheating and signal interference.
Firmware updates are essential for security and feature enhancements. Access the phone’s web interface by entering its IP address in a browser, log in with administrator credentials, and navigate to the Firmware section. Compare the current version with the latest release on the Aastra support portal. If an update is available, download the package, upload it via the web interface, and reboot the device. The phone will install the new firmware during the reboot cycle. Keep a backup of the current configuration before updating; the web interface allows exporting the configuration file for recovery if needed.
- Daily – Verify that the phone registers with the SIP server and that call quality is acceptable. Use the Diagnostics menu to run a ping test to the server and a trace route to detect network latency.
- Weekly – Inspect the network cable for wear and replace it if necessary. Clean the external connectors with a lint‑free cloth.
- Monthly – Review call logs and voicemail statistics to detect unusual patterns that may indicate security issues or misconfigurations. Update firmware if a new version is released.
For advanced troubleshooting, enable the Debug mode via the web interface to capture detailed logs. Save the log file and submit it to Aastra support through the portal, providing the serial number, firmware version. If the phone fails to register after a firmware upgrade, reset the device to factory defaults and re‑configure the SIP credentials. Aastra’s online knowledge base contains step‑by‑step guides for common issues such as “SIP 403 Forbidden” or “Call quality drops after network change.” When in doubt, contact Aastra technical support through the portal. Regular maintenance, combined with timely firmware updates, ensures that the Aastra 6737 remains reliable, secure, and fully functional in a dynamic network environment.