Radius Disconnect

Radius Disconnect (or Packet of Disconnect (PoD)) is a mechanism that allows the RADIUS server tosend a Radius Disconnect Message to the HA to release resources. Resources may be released for
administrative purposes, and are mainly Mobile IP bindings on the HA.

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Mobile IPv4 Registration Revocation

Basic Mobile IP resource revocation is an IS-835-C initiative that defines the methods by which a
mobility agent (one that provides Mobile IP services to a mobile node) can notify the other mobility
agent of the termination of a registration due to administrative reasons or MIP handoff.

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BTS3012 Typical Alarm Handling

Battery Circle Circuit Broken Alarm (ID: 6004)

This alarm is reported when the battery circle circuit is broken and the battery is configured.

Troubleshooting steps: Make sure the batteries connection are correct or not

Take down the cover of the battery box and measure the voltage between the two wire terminals. Make sure the voltage is consistent with the value on the label. If not, then change the connection between the batteries. Re-connect the batteries according to the “TBD Instructor” and Figure 1, if alarm appears, then go to next step

Note: Must turn off the breaker of the battery circuit when operating.

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DEMU Module Bts 3012

The Environment Monitoring Unit for DTRU BTS (DEMU) is a built-in engironment monitoring unit, functioning as an external environment alarm box. It monitors and controls the environment variables, Boolean values and analog variables, processes alarms, and guarantees secure and reliable operations of the BTS.

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DCOM BTS 3012

The Combining Unit for DTRU BTS (DCOM) is specially developed in compliance with the TRX combining requirement for the double-transceiver BTS3012. It combines two paths of DTRU transmit signals into one path and outputs the combined signal to the DDPU. It is typically applied when three to four TRXs need to be combined, for example, in case of S5–S8 configuration. The frequency band of the combiner includes the downlink frequency band (921 MHz to 960 MHz) of the RGSM.

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DDPU Module Of BTS 3012

The Dual Duplexer Unit for DTRU BTS (DDPU) communicates with the DTMU through CBUS3. It performs the following functions:

 Detecting and reporting VSWR alarms in the antenna system and low noise amplifier alarms

 Controlling the 16-level (in 1 dB step) low noise amplifier gain

Detecting and reporting the transmit power at the antenna system port

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DTRU Module of BTS

The DTRU is placed in the DTRU subrack. One DTRU has two TRXs. The DTRU performs the following functions:Receives management and configuration information from the DTMU, and reports its own status and alarm information to the DTMU,Receives signals frommobile stations through the antenna system, separate the signals into signaling and voice information through demodulation and balancing and then sends them to the upper level

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DTMU BTS 3012 Module

What is DTMU

See The Transmission, timing and Management Unit for DTRU BTS (DTMU) is the core part of the BTS3012. It performs the following functions:

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Lightning Protection Level and Power Calculation Reference

The lightning protection levels of the external interfaces of the BTS3012 are as follows:

E1 port 5 kA in differential mode and 8 kA in common mode in case of 8/20 us surge current

Trunk node input port 8/20 us surge current line-ground: 250 A

Trunk node output port Surge voltage: 4 kV in case of common mode 1.2/50us

 Analog value input

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Power Consumption Bts 3012

Power Consumption Bts 3012, lists the typical value of the BTS3012 power consumption. The power consumption must be designed according to the maximum value. It can be considered that:

The maximum power consumption of each DTRU working on the GSM900 band is 430 W.

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