Cisco ATA 187 User Manual (English)

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Questions and Answers:

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bonnie48Jul 26, 2025
Why does my Cisco Adapter ATA 187 reset unexpectedly?
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  Bryan JonesJul 26, 2025
  If your Cisco Adapter ATA 187 resets unexpectedly, verify that the Ethernet connection is stable. Check if the port or switch the phone is connected to is down or rebooting. Ensure the phone is properly configured for DHCP, and the DHCP lease duration is set appropriately (Cisco suggests 8 days). If using a static IP, verify the settings. If resets occur during heavy network usage, configure a voice VLAN. As a last resort, use the IVR to reset the phone settings to default.
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Mark MaddoxAug 3, 2025
What to do if Cisco Adapter ATA 187 does not register with Cisco Unified Communications Manager?
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  Kathleen FranklinAug 3, 2025
  If your Cisco Adapter ATA 187 doesn't register with Cisco Unified Communications Manager, first, make sure the network is running. Check the TFTP and DNS settings. If Cisco Unified Communications Manager or TFTP services aren't running, go to Cisco Unified Serviceability, navigate to Tools > Control Center - Network Services, and choose the primary Cisco Unified Communications Manager server. Alternatively, you can try to resolve this issue by creating a new configuration file: From Cisco Unified Communications Manager, go to Device > Phone > Find to locate the phone, delete it, and then add it back to the Cisco Unified Communications Manager database.
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Mrs. Melanie WilliamsAug 10, 2025
How to troubleshoot Cisco Adapter ATA 187 when it does not go through its normal startup process?
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  Denise LongAug 10, 2025
  If the Cisco Adapter ATA 187 doesn't start up normally, it could be due to faulty cables, bad connections, network outages, or lack of power. To troubleshoot, verify the network port's functionality by exchanging the Ethernet cables with known working ones. Try disconnecting a functioning phone from another port and connecting it to the problem port to check if the port is active. Also, connect the phone that won't start to a different, known good network port. Try connecting the phone directly to the switch port, bypassing the patch panel. If the phone still fails to start, perform a factory reset.
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Yesenia MartinAug 17, 2025
What to do if Cisco Adapter ATA 187 is unable to obtain IP address?
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  Barbara RileyAug 17, 2025
  If the Cisco Adapter ATA 187 is unable to obtain an IP address, ensure that the network or VLAN to which the phone is connected has access to the DHCP server, and verify that the switch port is enabled.

Cisco ATA 187 Specifications

General

Device Type	Analog Telephone Adapter
Protocol Support	SIP
Power Supply	External power adapter
Voice Codecs	G.711, G.729, G.726
Weight	0.3 kg
Operating Temperature	0 to 40°C (32 to 104°F)
Storage Temperature	-4°F to 140°F (-20°C to 60°C)
Relative Humidity	10% to 90% noncondensing