Cisco Unified Communications Manager System Guide, Release 9.1(1)
Cisco ATA 187
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Cisco ATA 187

Cisco ATA 187

This chapter provides information about the Cisco ATA 187 Analog Telephone Adaptor functions as an analog telephone adapter that interfaces regular analog telephones to IP-based telephony networks. The Cisco ATA converts any regular analog telephone into an Internet telephone. Each adapter supports two voice ports, each with its own telephone number.

Configure Cisco ATA

The Cisco ATA 187 Analog Telephone Adaptor functions as an analog telephone adapter that interfaces regular analog telephones to IP-based telephony networks. The Cisco ATA converts any regular analog telephone into an Internet telephone. Each adapter supports two voice ports, each with its own telephone number.

To configure the Cisco ATA refer to the following steps.

Procedure
    Step 1   Configure the Cisco ATA in Cisco Unified Communications Manager Administration.
    Step 2   Install the Cisco ATA.
    Step 3   Make a call.

    Cisco ATA 187 Features

    The following list describes the Cisco ATA:

    • Contains a single 10 BaseT RJ-45 port and two RJ-11 FXS standard analog telephone ports
    • Supports G.711 alaw, G.711 mulaw, and G.723 and G.729a voice codecs
    • Uses the Skinny Client Control Protocol
    • Converts voice into IP data packets that are sent over a network
    • Supports redial, speed dial, call forwarding, call waiting, call hold, transfer, conference, voice messaging, message-waiting indication, off-hook ringing, caller-ID, callee-ID, and call waiting caller-ID

    Connecting with Cisco Unified Communications Manager

    Like other IP devices, the Cisco ATA receives its configuration file and list of Cisco Unified Communications Managers from the TFTP server. If the TFTP server does not have a configuration file, the Cisco ATA uses the TFTP server name or IP address and port number as the primary Cisco Unified Communications Manager name or IP address and port number.

    After the Cisco ATA initializes, both ports on the Cisco ATA (skinny clients) attempt to connect with the primary Cisco Unified Communications Manager. If the connection or registration fails, the Cisco ATA skinny clients attempt to register with the next Cisco Unified Communications Manager in the Cisco Unified Communications Manager list. If that connection fails, the Cisco ATA skinny clients attempt to register with the last Cisco Unified Communications Manager in the list. If all attempts to connect and register with a Cisco Unified Communications Manager fail, the client attempts to connect at a later time.

    Upon successful registration, the Cisco ATA client requests the Cisco Unified Communications Manager software version, current time and date, line status, and call forward status from the Cisco Unified Communications Manager. If the Cisco ATA loses connection to the active Cisco Unified Communications Manager, it attempts to connect to a backup Cisco Unified Communications Manager in the Cisco Unified Communications Manager list. When the primary Cisco Unified Communications Manager comes back online, the Cisco ATA attempts to reconnect to it.