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Detailed Information

This module introduces the topic of converting analog voice and fax signals to digital voice signals over a T1 line. The scenarios now become more complex as the Configuration and Challenge Lab exercises utilize Cisco 3640 and AS5300 series routers with attached phones and faxes, and you will learn to configure additional voice features and troubleshoot common problems.

Objectives:

After completing this module, you should be able to:

• Understand how analog voice is digitized and transmitted over T1.
• Describe how basic compression methods are converted to digital signals:
  • Pulse Code Modulation (PCM)
  • Adaptive Differential PCM (ADPCM)
• Identify a-law and mu-law coding methods
• Define and describe the processes to convert analog signals to digital signals
• Understand the function of a Digital Signal Processor (DSP)
• Describe the benefits of transmitting voice over T1 networks
• Configure and troubleshoot voice card and general T1 controller settings
• Configure timing, signaling, framing, and line encoding on a router with a digital T1 network module
• Understand the differences between channel associated signaling (CAS) and common channel signaling (CCS)
• Configure CAS, CCS, E&M and FXS-to-FXO digital signaling types
• Configure and troubleshoot an ISDN network using CCS
• Troubleshoot a network using CAS
• Configure and troubleshoot Direct Inward Dialing (DID) and dialed number identification service (DNIS)
• Configure basic ISDN for both voice and fax calls

Labs

• Configure VoIP for ISDN connectivity over T1 using CCS
• Configure channel associated signaling CAS
• Configure the virtual networks to use VoIP between two locations
• Troubleshoot common problems relating to VoIP
• Challenge Labs (2)