Free Erlang traffic calculators

The world's first online Erlang traffic calculators

Telecom Traffic Online
  Home | Free calculators | Products | Tech. papers | Forum | About us
Erlang for Excel
VoIP bandwidth calculator
  • VoIP softswitch

    DUAL Softswitch is a complete Voice over IP switching and billing solution.  Flat monthly rate.

    Web control panels; Least Cost Routing; Excel tariff uploads; SIP and H323 support.

    H323 SIP softswitch >>

  • VoIP calling

    Premium quality termination for wholesale carriers with their own VoIP switch.

    44Direct >>

    Our lowest rates for wholesale carriers with their own VoIP switch.

    44Mobile >>

    Our unique online callshop billing system.

    Bill My Calls >>

calls that can be handled by TRX in GSM

  • Erlang for Excel

    An Add-In for Microsoft Excel that lets you use Erlang B and C functions in your own Excel spreadsheets.

    The ultimate in Erlang traffic modelling flexibility and data sharing.

  • Erlang Calculators

    An easy to use and fast Windows product offering Erlang B, Extended Erlang B, Erlang C and Call Minutes calculators.

    Four products in one, plus Erlang for Excel free.

  • VoIP Calculator

    Our entry level VoIP calculator allowing you to easily calculate your Voice over IP bandwidth requirements.

    Supports multiple codecs and packet intervals and RTP header compression.

LEMAURE - 18th March 2017  (07:02 GMT)

Hello Arinze Chidi!

HR/FR is a multiplexing mechanism on timeslot taken by the BSC in other to fit with capacity requirement. This rate change is guided by parameters that enable the BSC to take decision on the rate to set for new incoming calls in a particular cell.
Now half rate is 2 users multiplexed on a single TS every frame and each of them haS his SACCH channel on frame 12 and 25 for MR report purpose, across multiframe26

Arinze Chidi - 11th March 2017  (12:26 GMT)

What is half rate and full rate in Trx configuration?

Alieu Adikalie Bangura - 16th May 2016  (16:44 GMT)

is the number of Time-slots the same with the number of Channels in a TRX?

How many number of Time-slots in a TRX

How many number of channels in a TRX for both full-rate and half-rate??

How many number of channels in an E1?

How do you explain the relationship between an E1 and a TRX interms of channel equivalent?

VK - 5th October 2015  (19:03 GMT)


Currently there are features which support quad rate calls in the system ie 4 simultaneous calls at one time slot.

in Ericsson : it's known as VAMOS feature and in Nokia : it's known as OSC feature.

Ex: 1 TRX=8 tsl

using combined mode we have 7 TCH TSL.

Total Voice calls supported by TRX= 7*4=28 calls simultaneously.


sri - 5th October 2015  (02:47 GMT)

Why 86 call can handle from BSC at a time.Can you please explain

Raja - 14th December 2014  (07:50 GMT)

need to know about trx channel and xpic link configration

Tanuj - 8th May 2014  (08:40 GMT)

Hi Anurag

The number of calls that can be handled by a TRX depends on the number of channels defined on it, if all 8 channels are defined as Full Rate TCH then 8 calls and if 8 Half rate TCH then it can take 16 calls at one time.

Tanuj Roy

Anurag - 8th May 2014  (08:31 GMT)

Wants to know the possible number of calls for 1TRx

Mahesh - 19th December 2006  (11:35 GMT)

Hi rajababu,


if u use combined BCCH
then u have 7 TCHs
then minimum 7 full rate calls
maximum 14 half rate calls

then no of calls vary 7 to 14

if u use uncombined then one time slot for BCCH one for SDCCH

then u have 6 free time slots for TCH
then u can make 6 minimum full rate calls
and 12 maximum half rate calls

then no of calls vary 6 to 12

natural - 18th December 2006  (13:07 GMT)

how many E1 can supported 32 TS (4,6,4 BTS configuration

Other messages

Other messages: [Next 10 >>]

Post a reply to this article

Important notice

This forum is rapidly turning into a document exchange medium.  It was intended as an area for open discussion.  Please restrict your postings to open discussions.  Requests for documents are now being removed from this forum.

Name Enter your name.
Message Enter your message.
Email Optional -  If you enter your email address in this box, then you will automatically be notified if anyone replies to your message.  Your email address will only be published if you pay to post this message.
Verification code
Verification code Enter this verification code into the box.
Press the button to post your message.
Home | Free online calculators | Products | Technical papers | Forum | Contact us | About us

Last modified: 26 November 2014

Copyright 2014. All rights reserved.