https://www.cisco.com/c/en/us/support/docs/voice/h323/14001-analog-em-ts.html#step4
Analog E&M Troubleshooting Guidelines (Cisco IOS Platforms)
This document provides step-by-step guidelines to troubleshoot analog recEive and transMit (E&M) issues with Cisco IOS? Software based platforms. Analog E&M is supported on Cisco 1750, 1751, 1760, 26/2700 series, 36/3700 series, VG200, and MC3810 models.
www.cisco.com
- Audio Operation - The 2-wire / 4-wire operation is independent of the signaling type. For example, a 4-wire audio operation E&M circuit has six physical wires if configured for Type I or Type V. It has eight physical wires if configured for Type II or Type III.
- (본문중 : Operation 2-wire / 4-wire는 Signal Type 과 무방하다. 예를 들어, 4-wire operation+ Type(1 or 5)은 6가닥,
- 4-wire operation + Type(2 or 3)은 8 가닥의 선으로 구성된다.
https://www.cisco.com/c/en/us/support/docs/voice/h323/14003-e-m-overview.html?referring_site=bodynav
Analog E&M Voice Signaling Overview
Analog trunk circuits connect automated systems, such as a private branch exchange (PBX) and the network such as a central office (CO). The most common form of analog trunking is the E&M interface. E&M Signaling is commonly referred to as 'ear & mouth' or
www.cisco.com
https://www.cisco.com/c/en/us/support/docs/voice/h323/14081-voip-debugcalls.html
Troubleshooting and Debugging VoIP Call Basics
This document demonstrates basic techniques and commands to troubleshoot and debug VoIP networks. An overview of the Voice Call Flow and Telephony Architecture in a Cisco Router is presented, followed by a step-by-step VoIP troubleshooting approach present
www.cisco.com
https://www.cisco.com/c/en/us/support/docs/voice/h323/14001-analog-em-ts.html
Analog E&M Troubleshooting Guidelines (Cisco IOS Platforms)
This document provides step-by-step guidelines to troubleshoot analog recEive and transMit (E&M) issues with Cisco IOS? Software based platforms. Analog E&M is supported on Cisco 1750, 1751, 1760, 26/2700 series, 36/3700 series, VG200, and MC3810 models.
www.cisco.com
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