Chapter 5 Parameters and Defaults

Operational Parameters

NumTxFrames

Description

Use this parameter to select the default RTP packet size in number of frames per packet. The Cisco ATA default frame sizes are as follows:

•G.711 and G.729—10 ms

•G.723.1—30 ms

For example, to receive 20 ms of G.729 packets, set the parameter to 2.

Value Type

Integer

Range

1-6

Default

2

Voice Configuration Menu Access Code

35

Operational Parameters

This section includes parameters that are used for configuring the connection mode of the Cisco ATA as well as for disabling or enabling various operational features:

•CallerIdMethod, page 5-21

•FXSInputLevel, page 5-23

•FXSOutputLevel, page 5-23

•ConnectMode, page 5-24

•SigTimer, page 5-26

•OpFlags, page 5-27

•TOS, page 5-29

CallerIdMethod

Description

This 32-bit parameter specifies the signal format to use for both FXS lines for generating Caller ID format. The following values are allowed:

•Bits 0-1 (method)—0=Bellcore (FSK), 1=DTMF, 2=ETSI, and 3 is reserved. If method=0, set the following bits:

•Bit 3 to 8—Maximum number of digits in phone number part (valid values are 1 to 20)

•Bit 9 to 14—Maximum number of digits in name number part (valid values are 1 to 20)

Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide for MGCP (version 3.0)

 

OL-4803-01

5-21

 

 

 

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Cisco Systems ATA 186 manual Operational Parameters, NumTxFrames, CallerIdMethod
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ATA 186 specifications

The Cisco Systems ATA 186, or Analog Telephone Adapter, revolutionized the way traditional telephony interacted with Voice over Internet Protocol (VoIP) systems. Designed primarily for home and small office use, the ATA 186 allows users to connect standard analog phones and fax machines to a network, enabling them to take advantage of the benefits of VoIP technology.

One of the defining features of the ATA 186 is its dual port architecture. It includes two FXS ports, allowing users to connect up to two analog telephones. This functionality means that multiple devices can leverage VoIP services simultaneously without the need for separate adapters for each phone. The flexibility of the ATA 186 helps streamline the user experience, facilitating voice communication over an IP network while ensuring users can still use their existing phone equipment.

The ATA 186 employs various technologies to maintain high-quality voice calls. It supports standard voice codecs such as G.711 and G.729, which ensure efficient bandwidth usage while preserving call clarity. The adaptive jitter buffer technology further enhances call quality, compensating for network variations and minimizing latency, which is crucial for clear and uninterrupted conversations.

Additionally, the ATA 186 provides users with advanced calling features that were traditionally available only on PBX systems. These features include caller ID, call waiting, and voicemail functionality, integrating seamlessly with typical telephony services. The device also supports T.38 fax relay, allowing users to send and receive faxes over the internet, thus addressing the needs of environments where fax communication remains essential.

The security of VoIP conversations is also a priority for the ATA 186. It employs encryption protocols such as Secure Real-time Transport Protocol (SRTP) and Transport Layer Security (TLS), ensuring that voice data is securely transmitted across the network. This focus on security helps protect sensitive information transmitted during calls.

Installation and configuration of the ATA 186 is streamlined, with an intuitive web-based interface that simplifies the setup process. This accessibility makes it suitable for users with varying levels of technical expertise, as frequently required adjustments, such as network configurations and firmware updates, can be easily managed.

In conclusion, the Cisco Systems ATA 186 stands out as a versatile and robust solution for users looking to integrate analog phones into a VoIP environment. With its dual port capabilities, high-quality voice codecs, advanced call features, and security measures, it offers a compelling choice for both residential and commercial users seeking seamless telephony integration. As technology evolves, devices like the ATA 186 remain cornerstones in bridging traditional telephony with modern communication systems.
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