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Cisco ATA 187 Analog Telephone Adaptor Administration Guide for SIP (Version 1.0)
OL-21862-01
Chapter 1 Cisco ATA 187 Analog Telephone Adaptor Overview
Hardware Overview
Hardware Overview
The ATA 187 is a compact, easy to install device. Figure 1-4 shows the rear panel of the ATA 187.
Figure 1-4 ATA 187—Rear View
The unit provides these connectors and indicators:
• 12Vb power connector.
• Two RJ-11 FXS (Foreign Exchange Station) ports—The ATA 187 supports two independent RJ-11
phone ports that can connect to any standard analog phone device. Each port supports either voice
calls or fax sessions, and both ports can be used simultaneously.
• The ATA 187 has one network port—an RJ-45 10/100BASE-T data port to connect an
Ethernet-capable device, such as a computer, to the network.
Note The ATA 187 performs auto-negotiation for duplexity and speed and is capable of 10/100 Mbps,
full-duplex operation.
Software Features
The ATA 187 supports these protocols, services and methods:
• Secure Real-Time Transport Protocol, page 1-6
• Name Signaling Event based passthrough, page 1-6
• Transport Layer Security Protocol, page 1-6
• T.38 Fax Relay, page 1-6
• Voice Codecs Supported, page 1-6
• Other Supported Protocols, page 1-6
• ATA 187 SIP Services, page 1-7
• Modem Standards, page 1-7
• Fax Services, page 1-8
• Methods Supported, page 1-8
• Supplementary Services, page 1-9
LINE 1 LINE 2 NETWORK
POWER
197044
12VDC 1A