- This topic has 16 replies, 1 voice, and was last updated 14 years, 8 months ago by Raj.
7th October 2004 at 10:04 #39900omerGuest
i am new to the GSM wrld…having trouble understanding wat E1 is? and how it is transmitted btw different nodes? and wat relation is there btw E1 and SS7?
thx7th October 2004 at 23:18 #39901alexanderGuest
E1 is an old standard for 2M transmission lines and it’s still the most widely used standard in telecom field, it consists of 32 timeslots of 64k each. E1 has no correspondense wich SS7 since E1 is just transmission link but SS7 is a logical signalling link wich may occupy 1 or several timeslots on E1.
http://www.dx200.biz8th October 2004 at 04:21 #39902omerGuest
could u explain in detail wat u mean by
“E1 is just transmission link but SS7 is a logical signalling link ”
and is there any document or website with all this detail?
thx alot 4 ur help8th October 2004 at 17:35 #39903alexanderGuest
E1 is a name for 2048 Kbit/s transmission link which consists of G.704/G.703 etsi specification protocols. If you need more document about this protocols, let me know, I can send it to you by email, or you can find them on the web site http://www.etsi.org
again, E1 is a name for 2048 Kbit/s transmission line which consists of 32 timeslots, you can place on this line any other protocols which occupy less then 2M.
http://www.dx200.biz28th October 2004 at 05:19 #39904omerGuest
could u please send me the E1 documents at
thx29th October 2004 at 05:33 #39905OliverGuest
Try to download a very interesting E1 document from http://www.acterna.com
This is really helpfull or you can get G.703 ITU Recomendation.29th October 2004 at 10:43 #39906EricGuest
Does anybody know how to test the
requirement of G.703 6.3.1 ?
That clause is :
6.3.1 The digital signal presented at the input port shall be as defined above but modified by the characteristic of the
interconnecting pair. The attenuation of this pair shall be assumed to follow a f law and the loss at a frequency of
1024 kHz shall be in the range 0 to 6 dB. This attenuation should take into account any losses incurred by the presence
of a digital distribution frame between the equipments.
It would be grateful if you can shed some light on me.
Eric1st November 2004 at 05:02 #39907OmerGuest
where on the website can i find the E1 document?
thx1st November 2004 at 17:41 #39908alexanderGuest19th November 2004 at 08:09 #39909Quang VinhGuest
64kbps SS7 signalling channel can assign in any time slot in E1, from TS1 to TS31,except TS0.14th December 2004 at 06:47 #39910PARTHGuest
HI I WANT TO KNOW ABOUT E1 LINES?
I KNOW THAT IN THAT 32 TIMES SLOTS ARE THERE. BUT I DO NOT UNDERSTAND IT?
HOW THESE TIME SLOTS ARE POSSIBLE IN A LINK?
IT WILL BE HELPFUL TO HAVE DOCUMENTS FOR THAT.
WAITING FOR YR REPLY.22nd December 2004 at 07:36 #39911DapinderGuest
Can u please send me a documentation of E1 ,channels and timeslots.
maximum no timeslots are used for data and signalling.
My email id is email@example.com December 2004 at 08:43 #39912quangvinhGuest
Similar to the North American T-1, E1 is the European format for digital transmission.
E1 carries signals at 2 Mbps (32 channels at 64Kbps, with 2 channels reserved for signaling and controlling), versus the T1, which carries signals at 1.544 Mbps (24 channels at 64Kbps). E1 and T1 lines may be interconnected for international use.
It has 32TS (TimeSlot), assigned:
+TS0: for only synchronous purpose. 8 bits is “X0011011”. It indicates the starting point of frame. X- CRC code option.
+TS0-TS15: data channel: voice, fax, v.v… You can used Nx64kpbs.
+TS16: for R2MFC signalling and multi-frame synchonazation. In CCS7 system, TS16 also carriers the data.
+ CCS7 can be carriered in any TS, from TS1-TS31.
Regards.26th December 2004 at 09:52 #39913barzinjGuest
any one knows about Erlang? please send me a documentation27th December 2004 at 08:06 #39914DapinderGuest
for helping me.Great help