How to enable engineering/field test mode in blackberry

Blackberry phone has best engineering mode. You can enable it by using below steps:

Blackberry has a very nice and interesting field test/Engineering mode.
While reading a blog I show that pressing ALT+CAP+H would display usefull  information about your mobile.
But you can enable the engineering mode from this screen using steps metioned in the blog:
http://www.zibri.org/2009/08/hidden-things-are-usually-best.html
Please make sure to follow steps very clearly. Read it twice! 

UMTS Mobile Originated call flow sequence diagram (Mobile to Landline)

UMTS Voice call flow diagram for mobile to mobile call

This call flow is captured at RNC.

3G Handover Events 2a, 2b, 2c.. explained

·         Event 2a: Change of Best Frequency

·         Event 2b: The estimated quality of the currently used frequency is below a certain threshold and the estimated quality of a non-used frequency is above a certain threshold

·         Event 2c: The estimated quality of a non-used frequency is above a certain threshold

·         Event 2d: The estimated quality of the currently used frequency is below a certain threshold

·         Event 2e: The estimated quality of a non-used frequency is below a certain threshold

·         Event 2f: The estimated quality of the currently used frequency is above a certain threshold 

Periodic Location Update Timer(T3212)

Periodic Location update timer controls periodicity of the location update procedure triggered by Mobile(UE). The value T3212 shall be set to 0 if Peridic location updating procedure need to be disabled. The value can be set in multiples of 6 (6 mins) and default value is 60. When it is set to 60mins, T3212 is set to 10 because T3212 value is in dechours. 1 Decihour = 6mins

Change or add the SMSC number to apple iPhone

How to get the SMSC set in the iPhone?
In the iPhone keypad and type *#5005*7672# Press Call
How to erase the SMSC set in the iPhone?
In the iPhone keypad, type ##5005*7672# Press Call
How to modify the SMSC set in the iPhone?
In the iPhone keypad, type **5005*7672*+# Press Call

Engineering mode/Field test mode in various mobiles using codes

LG Mobile:
Most of the LG Models have similar field test menu:

1. Version
2. Factory Reset
3. Device Test
4. Port Setting
5. Modem Setting
6. SIM Test
7. IMS Setting
8. IM Client ID
   

Engineering mode (field test mode) could be found under Modem Setting. Modem setting has various options including the Network mode, Engineering Mode, GPRS Attach and many more. In some of the LG Models if you want to get into Engineering mode directly using code *748#96


Code:  277634#*#
Model : LG CU720 (LG Shine), LG CU575, LG CU500, LG CU400 (many other models)

Code : 3845#*360#
Model:  LG CF360(This model has more options in the field test mode like GPS, DRM test menus, Calibration data)


Samsung Mobile:
Code: *#0011#
Model: SGH-A707, SGH-A717, SGH-A727, SGH-i617 and many other models support this code.


Apple iPhone:
Code : *3001#12345#* then press call
Various field test information could be seen under the menus.

Blackberry Mobile:
Code: Menu->Settings->Options->status
This would show some of field test information on blackberry phones.


Nokia Mobile:
Code: *3001#12345#.
Code changes on some of the Model. Some time field test displays as Net monitor in Nokia mobiles.  Most of the models like Nokia 12xx, 51xx (except 5125), 61xx, 62xx, 71xx,3285, 63xx are supported with this code. To get out the engineering mode, you need to either dial 00/01 in some models, in some models in net monitor, you many dial 0000.

You contact me if you need more information or field test mode for any other phone/model, I would try to look and get the information back to you.

What is WPS - Wireless Priority Service

WPS means Wireless Priority Service which is priority calling service provided to the subscribers by the operators. This service is add-on service which shall be subscribed by the subscriber.  User must be having WPS feature enabled to make the WPS call.
To make WPS call, dial, *272 + Destination Number

Remember you do not need a special cellphone to make WPS call, only need to subscribed to WPS package from operator. Receiver of the WPS call does not need to subscribe for the WPS feature. *272 enables the priority access to local channels, High probability of completion  features (HPC). If the terminating end is mobile user the then priority channels are allocated for terminating call.

AMR: Discontinuous TX (DTX)

Mobile Battery life will be prolonged or a smaller battery could be used for a given operational duration. From the network point of view, the average required bit rate is reduced, leading to a lower interference level and, hence, increased capacity.




How to acheive DTX in AMR?

- Voice Activity Detector on TX side

- Evaluation of the background acoustic noise on the TX side

- Transmission of comfort noise information to the RX side using SID at regular intervals

- Generation of comfort noise on the RX side during periods when no normal speech frames are received.

What is Unlicensed Mobile Access - UMA

UMA provides tunneled IP connection to GSM/GPRS services through WiFi frequencies. But it needs dual mode mobile, to support roaming between wireless networks and unlicensed WiFi networks. UMA Network controller (UNC) is critical network node interworking between tunneled WiFi connection and cellular network.

Picture is referenced from book by Harri Holma and Antti Toskala

What is Push-to-Talk over Cellular (PoC)

PoC is a one way communication over cellular network or called half duplex communication where voice call is full duplex. PoC called as walkie-talkie over PS domain of cellular networks. Best advantage is airtime which would be 1/4th or even less because voice packets transferred only one direction at a time. Radio resources can be allocated and released when needed.

LTE as an all IP architecture

LTE (Long term evolution) is the latest standard for mobile network technology, specifications are available in the 3GPP standard. LTE is also an all IP architecture supported by major vendors like AT&T, T-Mobile, Verizon and more. Best part of the technology is that it also provides the inter-working for non 3GPP systems like 3GPP2 (CDMA)and WiFi, WiMax etc. Non 3GPP system are divided into trusted and non-trusted, based on that architecture will change. It is also called as 4G technology in mobile network industry. 3GPP release 8 and above specification talks about adapting to LTE. LTE started as a technology which support packet data network, later to support voice over the packet data network.
What is more fascinate about LTE?
- All IP Architecture
- Signaling and Data path separated out using MME and S-GW where PS Core and CS core is merged into single core network
- High data rates
- Decreased latency
- Better spectrum efficiency
- Scalable bandwidth
- Support for paired and unpaired spectrum
- Inter-working with 3GPP and non 3GPP systems

Below is reference architecture and inter-working with existing 3GPP systems (Reference 3GPP specifications: 3gpp.org)

Concerns operators shall have could be
- Cost effective evolution of IMS and LTE
- Spectrum efficiency
- Service quality
- Coverage performance
- CAPEX and OPEX

Target would be to address these concerns. However lot depends on the approaches that would be considered by operators for the architecture. Most of them probably consider overlay architecture and gradual transition.

If you have any questions please try to post the same. I would try to answer the same.

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