- This topic has 409 replies, 1 voice, and was last updated 13 years, 8 months ago by Dude.
12th July 2002 at 18:47 #33753Harshvadan JaniGuest
what is LTG?
as such i work with Ericsson Swtich so i dont have any idea with the term LTG.
Harshvadan Jani13th July 2002 at 06:01 #33754SudhirGuest
LTG its a siemens terminology, for Line Trunk Group.
DIU OR DSL: Digital interface Unit : is the interface where the actual E1s are terminated
Four DIU are connected to One LTG card.Siemens switch has a maximum of 256 LTG. that means u can have 256*4=1024 number of E1s terminated in a single switch.
I hope i have cleared u r doubt.13th July 2002 at 18:36 #33755Harshvadan JaniGuest
Thanks Sudhir for explaining the term LTG.
with best rgds,
Harshvadan Jani15th July 2002 at 07:46 #33756jerryGuest
hie Harshvadan Jani
Our switch is an Erricson AXE10 .
On VAS(Value Added Services) we use a comverse ISMSC. I am looking forward to develop sms based VAS services for my company. I also want software for the SMPP interface on the ISMSC-please help!.If you can give me information on how I can dimension all the elements of the switch(ecpool,ETCs towards the PSTN, ETCs towards BSC,C7 links,CSK-D,AST-DR,CCDs,etc.I also want information on capacity planning,traffic measurements,etc.16th July 2002 at 09:26 #33757NitinGuest
Is there any body who can explain me about E1 & PCM.
Regards16th July 2002 at 15:25 #33758SudhirGuest
PCM is pulse code modulation.It converts anlog signal into digital signal. The sampling frequency is 8000hz, that is to say u have 8000 samples per second(this process is called as sampling). each sample is represented by 8bits(Quantising and coding).PCM30 or E1, has 32time slots and each time slot is of 64kbits/sec so the transmission rate for one PCM-30 is 2048kbits/sec.17th July 2002 at 10:06 #33759NitinGuest
But can you explain that what is the meaning of like we have applied to BSNL for 8E1 for local & 4E1 for TAX. How many subscribers One E1 can handle?
& in 1 PCM cable how many E1 can be accomodate?17th July 2002 at 14:17 #33760SudhirGuest
BSNL is the gateway to external world.All ur STD and ISD calls are routed through BSNL. when u have asked for 8E1s from BSNL that means ur exchange will be connected to the gateway at BSNL through 8 pysical links.These links are physical trunks connected between ur exchange and BSNL. 1PCM cable will carry only one E1. As i said earlier one E1 has 32timeslots, out of which 2 timeslots are used for signalling and rest 30 timeslots are used as traffic chanels. so one E1 can carry 30 speech channel at a time.27th July 2002 at 12:52 #33761Mehmet BeyazGuest
For any questions about NSS and BSS planning I can help.
Do not hesitated to contact me if you have further questions
firstname.lastname@example.org September 2002 at 15:37 #33762VasanthGuest
I am fresher under motorola training in gsm fundas , sys 02, sys 04,CDMA and Gnl 070
and am currently assigned to Switching by Motorola on BSNL project in India.
Can anyone help me out with some material on Siemens Switch in MSC
Vasanth Mohan Manchi
email@example.com September 2002 at 06:55 #33763makhijapGuest
I am working as digital switcing installation engineer,can u give reply that .what is GSM system ,and type of method for designing passive/active reflector.2 what is access net ,give its types and where we can use and how it is working for subscriber.12th September 2002 at 06:22 #33764SharmaGuest
As u told that u can help in the field of RF.So will u please let me know about Frequency Hopping.
Regards12th September 2002 at 15:58 #33765NitinGuest
What is the meaning of E1 for TAX & E1 for Local.14th September 2002 at 02:57 #33766Van 14 _9_2002Guest
Hello Sudhir !!!
I am working in Telecomunication copany in VietNam .
Could you help me some thing?
1 -diversity antenna (in mobile comunication )
2- about antenna (type ,confige,characterictic …)
3 -what is cross antenna ?
4- How to install antenna (for Base Tranciever Station )
send me detail ok!
thanks in advance!!!!!!!!!14th September 2002 at 18:20 #33767MuzammilGuest
E1 means the European standard of Primary Carrier Multiplex (PCM), T1 (American) and J1 (Japanese). E1 has 32 timeslots (TS) out of which 2 TS carry Signalling and Sync. Each Channel carries 64kbps of Pulse Code Modulated (PCM) voice.
TAX (Trunk Automatic eXchange) is a higher hierarchy of the switch, which usually carries STD calls from one region to other.
And Now E1 for TAX is the E1 PCM which is connected directly to TAX, and E1 local is …
Hope this helps….