Chapter 5 Parameters and Defaults

Dial Plan Parameters

Syntax

Hdnnnn

where d is a delay-in-seconds parameter 0-9,a-z (to support 0 to 35 seconds delay), and nnnn is the variable-length phone number to call when no digits are entered for d seconds after offhook.

Example 1

H05551212

This is a hotline configuration; the Cisco ATA immediately dials 555-1212 when the handset goes off hook.

Example 2

H55551212

This is a warmline configuration; the Cisco ATA waits for five seconds and dials 555-1212 if no digits were entered when the handset went off hook.

‘P’ Rule to Support Dial Prefix

This rule is for automatic pre-pending the dial string as entered by the user with a specified prefix.

Syntax

Ptnnnn

where t is a single leading trigger character; if t is the first entered digit when making a new call, it triggers the prepending of a variable-length prefix (as specified by nnnn) in the dial string. The t character can take one of the following values:

0-9,*,#, 'n' (= any of 1-9), 'N' (any of 'n' and 0), 'a' (any of 'n',* and #), or 'A' (any of 'a' and 0);

Example

Pn12345

This rule prepends 12345 to the dial string when the first entered digit is any of 1-9. The triggered digit is not removed from the dial string.

‘R’ Rule for Enhanced Prefix

This enhanced prefix rule matches entire strings, whereas the ‘P’ rules matches only a single digit. The ‘R’ rule is for automaticly prepending a specified prefix to the dialed string. The string must be an exact match to trigger the rule. If more than one ‘R’ rule matches, the first matched ‘R’ rule is triggered.

The ‘R’ rule also uses negation to exclude one or more leading digits before prepending the defined prefix string.

The number of dashes (-) after the R represents the number of leading digits that will be removed preceding the prefix.

Syntax

Rnnnn(tttt)

where tttt is a trigger string. If the dialed numbers match this string, this match triggers the prepending of a variable-length prefix (as specified by nnnn) to the dial string. The triggered string is not removed from the dial string. The negation, subrule matching and range patterns can be applied to the trigger strings.

Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide for H.323 (version 3.0)

 

OL-4804-01

5-55

 

 

 

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Cisco Systems ATA 188, ATA 186 manual ‘P’ Rule to Support Dial Prefix
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ATA 188, 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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