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 >>

E1 framed/unframed

Salvo - 27th August 2011  (22:42 GMT)

What do you mean with 8 users?
Aren't there at least 31 TS to be used simultaneously by one user per TS?
Half rate would mean x2?
Or will there be a need for signaling which takes all other TS?

bjushka - 26th August 2011  (15:44 GMT)


In one timeslot we can have simultaneously, only one voice call if the timeslot is full rate and two voice call if it is half rate.

In one TDMA frame, we can have 8 users at the same time.

HARJEET - 26th August 2011  (14:08 GMT)


al83 - 26th July 2011  (09:18 GMT)

Thanks Geek

srinivas - 19th July 2011  (09:20 GMT)

How to convert .PL4 files to .MDB?
I was trying to convert it through .NTC butit was not successful.

Please suggest me!

Geek - 8th July 2011  (15:06 GMT)

Ah, I just realized that I was thinking T1 here.
The number of time slots in E1 shall be 32 not 24 :)

Geek - 4th July 2011  (18:57 GMT)

Framed or also known as structured E1, means that it has the protocol needed to distinguish each time slot in a frame.
A 2048 kbps E1 frame has 24 Time slots. TS 0 usually is used for signaling and the remaining TS will each contain a 64 kpbs voice channel. This is needed when older style telecom transmission is used and you need to have the TS separated. See ITU-T G.704 for reference.
Sampling with 8bits at 8kHz was the normal ETSI telephony digital sampling standard before (and still are at many places yet), giving the 64kbps channels. So a E1 actually could carry 23 simultaneous Telephony connections.

Unframed means that there are no structure with TS, only a bitstream of 2048 kbps. It will not be possible to divide this stream into Time slots.

al83 - 9th June 2011  (13:40 GMT)

Can someone explain the difference between Framed and Unframed E1.

Post a reply to this article

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.
Please confirm you are human.
Press the button to post your message.
Home | Free online calculators | Products | Technical papers | Forum | Contact us | About us

Last modified: 17 May 2017

Copyright 2017. All rights reserved.