How does the IP phone connected to the AR router work properly

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When the AR1220V, AR1220W, or AR1220VW connects to an IP phone and the IP phone has no external power supply, the IP phone must be connected to the FE4, FE5, FE6, or FE7 interface on the SRU and the AR router must be connected to an external power supply. When other models are connected to IP phones, IP phones must be connected to external power supplies.

Other related questions:
How does the IP phone connected to the AR router work properly
When the AR1220V, AR1220W, or AR1220VW connects to an IP phone and the IP phone has no external power supply, the IP phone must be connected to the FE4, FE5, FE6, or FE7 interface on the SRU and the AR router must be connected to an external power supply. When other models are connected to IP phones, IP phones must be connected to external power supplies.

The E1 interface of an AR router does not communicate properly
If the E1 interface of an AR router does not communicate properly, investigate the causes as follows: If the link of E1 interface cannot be accessed, the state of the interface alternates between Up and Down, or a lot of CRC errors are found in the interface statistics displayed after the display interface Serial command is run, it may because: - The E1 card is not grounded (high probability). - Electromagnetic interference sources, such as motors, transformers, and generators, exist along the route of the E1 cable. - The cables of the E1 line are distributed outdoors, and the interface is damaged because of thunderstorms. - The impedance of the E1 interface does not match the impedance configuration of the cable (configuration problem). Run the display controller e1 or display fe1 Serial command to check the impedance of each cable type. Run the line-termination or fe1 line-termination command to modify the impedance.

Does the CT license need to be configured on the AR that is connected to an IP phone
The CT license is not required when the IP phone connects to the AR router. The CT license is used to implement call transfer over a trunk. That is, calls received over one trunk are forwarded over another trunk.

A DSP module does not work properly
The problem may be caused by the following reasons: 1. The DSP DIMM module is not installed or not properly installed. 2. An audio license file is not installed on the system. For details, see the following URL: DSP无法正常工作

Do IP phones require external power supplies when connected to AR series routers
When connected to the AR1220V, AR1220W, AR1220VW, IP phones without external power supplies must be connected to FE4 through FE7 interfaces on the main control board. The Routers must be connected to external power over Ethernet (PoE) power supplies.When connected to other AR Series Routers, IP phones must be equipped with external power supplies.

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