Chapter 6 Configuring and Debugging Fax Services

Debugging the Cisco ATA 186/188 Fax Services

Configuring the Cisco IOS Gateway for Fax Mode

On the Cisco gateway, disable both fax relay and fax pass-through at the dial-peer level or system level with the following commands:

Procedure

Step 1 Run the command:

fax rate disable

Step 2 Run the command:

no modem passthrough

Debugging the Cisco ATA 186/188 Fax Services

This section includes the following debugging topics for fax services:

•Common Problems When Using IOS Gateways, page 6-7

•Using prserv for Diagnosing Fax Problems, page 6-8

•Using rtpcatch for Diagnosing Fax Problems, page 6-12

Common Problems When Using IOS Gateways

Table 6-1lists typical problems and actions that might solve these problems for situations in which the Cisco ATA is using fax over a Cisco IOS gateway.

Table 6-1 Solving Common Fax Problems

Problem

Action

 

 

The far-end gateway is not

Cisco recommends IOS version 12.2 (11)T or higher for the Cisco 2600

loaded with correct

and Cisco 3600, and IOS version 12.1 (3)T or higher for Cisco AS5300.

software image.

The Cisco 6608 supports both the NSE and NTE methods of fax

 

 

pass-through mode, beginning with software version

 

D004030145S16608. To use fax pass-through mode with the Cisco 6608,

 

the user must select 6608 NSE mode, and the NSE payload type must be

 

reconfigured to match the Cisco ATA.

 

 

The Cisco IOS gateway is

Perform these steps:

not configured using the

1. Enter the following CLI commands:

external T1 clock.

 

 

Controller T1 0

 

clock source line

 

2. On the Cisco CallManager Gateway Configuration page, choose the

 

T1 line connection port. Set the clock as “external primary.”

 

 

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

 

OL-4803-01

6-7

 

 

 

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Cisco Systems ATA 188 manual Debugging the Cisco ATA 186/188 Fax Services, Configuring the Cisco IOS Gateway for Fax Mode
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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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