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Questions tagged [telecommunication]

Telecommunication domain relates to wireless standards like GSM, GPRS, UMTS, LTE, WiMAX, IEEE 802.11. Programming questions related to 1G,2G,3G,4G,5G Cellular Communication can be asked here.

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Answer incoming call using android.telecom and InCallService

Since API 21, Google has been adding features to android.telecom in general, especially by implementing more members of TelecomManager and the addition of InCallService. This last one is is supposed to allow non-system, 3rd-party apps to provide and…
leRobot
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Android: register new PhoneAccount for telecom

I'm trying to make a new PhoneAccount to use my implementation of ConnectionService. In the documentation it says I need to register a new PhoneAccount with TelecomManager and then select it in my phone-app's settings. Here's my code: TelecomManager…
ProfessorChaos
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Sorting Items by a Cyclical Sequence Number

I am developing an algorithm to reorder packets in a transmission. Each packet has an associated sequence number in [0, 256). The first packet's sequence number can take on any one of those values, after which the next packet takes the next value,…
HardlyKnowEm
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Least mean square to equalize optical fiber channel

I used a Matlab code of LMS (least mean square algorithm) to equalize the effect of the channel, it is working for a tapped delay channel generated in MATLAB but for optical fiber channel using optisystem program, it doesn’t work well, i think the…
Mai Fouad
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Uses of Erlang in Telecom

I'm a web developer and a college student majoring in telecommunications. This means I'm decent at programming and I know a little about telecom networks (at a high, non-technical level). I keep reading that Erlang is used all over the telecom…
user94154
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How to retrieve TAC from IMEI?

The problem is simple. I have an IMEI and I want to retrieve a TAC from it. How can I do it? Is there a way of recognizing how many digits should TAC have if I have just an IMEI? Is it necessary to know explicitly the year of production of the…
Przemysław Różycki
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Carrier app throws SecurityException when adding an APN

We have an eUICC with carrier privileges, we are able to check the privileges by telephonyManager.hasCarrierPrivileges() and it returns true. Android documentation says that we are able to use the Content provider APIs to add, modify an APN. But we…
muhammetgurdogan
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How do I find if my Wi-Fi card supports MIMO (Multiple Input Multiple Output)?

I want to know if my Wi-Fi card supports MIMO (Multiple Input Multiple Output), and specifically how to find the number of antennas. Is there a command I can run to find out?
Majdi Chebil
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Cell (cell-id), BTS and BSS in GSM network

what is the relation between BTS and cell? I think one BTS hardware can cover few cells and also some cells could be covered by more than one BTS isn't it? Is part of information, that mobile receives from GSM network identification of concrete BTS…
STeN
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What is the difference between N1 interface and N2 interface in 5G?

In every 5G diagram, they have the N1 interface directly connected to the UE. Is it really a direct connection? or is it still going through the radio? If so what is the difference from N2?
abatjarg
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design patterns for telecom software hard multithreading problems

In Martin Fowler's book Patterns of Enterprise Application Architecture he writes on page 2: "In some ways enterprise applications are much easier than telecoms software -- we don't have very hard multithreading problems ...". Is anybody aware of a…
minghua
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Timer T323 and fast dormancy in UMTS network

I was googling for RRC state transitions in UMTS networks and found that "whenever UE feels that there is no data left for transmission it starts a timer T323 ,upon expiration of this timer it sends a SCRI signal to end connection. On reception of…
Adi Tiwari
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Setting up freeswitch server on Google cloud compute

I am trying setup freeswitch server on google cloud compute (ubuntu 14.04) although it work fine for me locally, I seem to get the following error when I start freeswitch server on google cloud compute.Can any one explain? 2015-06-11 05:40:32.001508…
Pandurang Waghulde
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Error Detection Effiency (CRC, Checksum, etc)

I have a hypothetical situation of sending data units, each of a thousand bytes. Failure rate is rare but when a error does occur it is less likely to be a single bit error and more likely to be an error in a few bits in a row. At first I thought of…
irl_irl
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How to control a cisco IP-Phone from the CLI?

I've a Cisco IP-Phone 7945 and I want to control it from my CLI. For example I want to start a command like call start 12345 #12345 is the number I want to call or call cancel Anybody knows a tool or something similiar? I'm writing a rails app…
Daniel
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