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Grandstream HT503 ATA (Sky)

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Product Names
GRANDSTREAM HT503 ATA
Grandstream HT503 ATA (Sky)
Grandstream-HT503-ATA
Overview

The Grandstream HT503 is a versatile analog telephone adapter (ATA) that is supported by the Sky phone system. This device enables an analog device to interact with a VoIP phone system. This ATA works with overhead paging systems, door buzzers, and TTY/TDD devices.

NOTE: Although this ATA is still supported, see the Grandstream HT813 ATA, which is a newer model that is easier to configure and more readily available than the Grandstream HT503.

The HT503 can technically be used for analog telephones, but because of an issue that degrades the quality of calls that are 30 minutes or longer in duration, we cannot recommend the HT503 for use with any analog phones.

The Grandstream HT503 has only one connection for an analog device. This device supports LAN connections via MAC, 802.3, 802.1p VLAN tagging and 802.1Q.

If you have questions about this Grandstream ATA device, create a Support Case to submit your questions to Support.

Requirements

  • Analog Profile

Order a Grandstream HT503 ATA

To place an order, contact Support.

Configuration Instructions

Use the following instructions to configure a Grandstream HT503 ATA:

  1. Connect the WAN port to the network, plug the device into power, and connect an analog phone.
  2. Pick up the analog phone and dial *** to log in to the configuration menu.
  3. Dial 02 to hear the IP address, then press #.
  4. Dial 12 and then 9 to toggle the setting that allows web access from the WAN, then press #.
  5. Power cycle the device and allow 5-20 minutes for the reboot process.
  6. In the address bar of any web browser, type the IP address of the device.
  7. Enter admin as the password.

Basic Settings Tab

  1. Access the Basic Settings tab.
  2. Set Device Mode to Bridge.
  3. Set Reply to ICMP on WAN port to Yes.
  4. Set Enable LAN DHCP to No.
    IMPORTANT: Failure to do this will cause serious problems with the network in the Advanced Settings below.
  5. Press update at the bottom of the page.

Advanced Settings Tab

  1. Access the Advanced Settings tab.
  2. Update the Firmware Upgrade and Provisioning section.
    • Set Upgrade Via to TFTP.
    • Change Firmware Server Path to the primary TFTP (Config Server) IP address (for example, 66.11.207.37).
    • Remove the data in the Config Server Path and leave it blank.
  3. Press update at the bottom of the page.

FXS Port Tab

  1. Access the FXS Port tab.
  2. Set Primary SIP Server to the primary TFTP (Config Server) IP address followed by :15061 (for example, 66.11.207.37:15061).
  3. Set SIP User ID and Authenticate ID to the full ten-digit DID phone number (for example, 2016390547).
  4. Set Authenticate Password to the default 5-digit password.
  5. Set DNS Mode to SRV.
  6. Set User ID is phone number to Yes.
    • If Software version is 1.0.5.5: Tel URI "User=Phone"
  7. Set Unregister On Reboot to Yes.
  8. Set Outgoing Call without Registration to No.
  9. Set Use Random Port to Yes.
  10. Set all 3 Preferred DTMF methods to RFC2833.
  11. Set Enable Call Features to No.
  12. If the ATA is for a door buzzer, the Offhook Auto-Dial should be the 4-digit extension of the Ring Group.
    • If the ATA is for any other device, Offhook Auto-Dial should be blank.
  13. Set Disable Call-Waiting to Yes.
  14. Set Disable Call-Waiting Caller ID to Yes.
  15. Set Disable Call-Waiting Tone to Yes.
  16. Set Use # as Dial Key to No.
  17. Set Preferred Vocoder as follows:
    • Choice 1-4 is G729
    • Choice 5-8 is PCMU
  18. Set iLBC Frame Size to 30ms.
  19. Set Symmetric RTP to Yes.
  20. Set Fax Mode to Pass-Through.
  21. Set Fax Tone Detection Mode Caller and Callee.
  22. Set Jitter Buffer Length to High.
  23. Set Polarity Reversal to Yes.
  24. Set Loop Current Disconnect to Yes.
  25. Set Loop Current Disconnect Duration to 1000.
  26. Set Hook Flash Timing.
    • Minimum to 200
    • Maximum to 500
  27. Set On Hook Timing to 200.
  28. Press update at the bottom of the page.

FXO Port Tab

  1. Access the FXO Port tab.
  2. Set Account Active to No.
  3. Press update at the bottom of the page.
  4. Press reboot at the bottom of the page.
  5. Allow 5-20 minutes for the reboot process.

Testing

Pick up the analog phone. If the configuration was performed correctly, a dial tone can be heard.

  • If the ATA is for a door buzzer, the analog phone will ring out to the Ring Group provisioned for that purpose.

Related Topics

ATA Devices
Overhead Paging Systems
Door Buzzers
Ring Groups
TFTP/Config Server
Supported Phones and Devices
Sky Account Portal
MiCloud and Sky Support
Opening a Support Case
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