Difference between TSC and DSC and LOC 2

[ccarmock]

With the help of people here I have managed to get my multi-site installation working such that users at one site can use trunks off another switch in the event of local line failure.

This is working great, however has posed a few questions as to whether my network was setup correctly in the first place.

Firstly for network dialign some sites have been setup to use TSCs and others DSCs Does this matter? Is there any difference? How does these compare with LOC codes?

Now to displayed digits....

In this example from my 81C I dial 72+extn to call an extension on one of the 11Cs and from the 11C I dial 80+extn to call the 81C. When I call from the 81C to the 11C the 80 appears on the destination sets display. This is achived via a DAPC table on route 120 which is my ITG TIE. However when a user on the 11C calls to 81C the return access code is not displayed. The issue here is I have multiple remote sites connecting into the 81C over the same route so can't create DAPC tables to do the work I dont think.

I have noticed that someone has set one end up to use a DSC and the other to use a TSC.....

Any advice? Or should I tear it down and start again.

Clive

 

[johnpoole]

here is the way i do it, using dsc's only, not that tsc, lsc's wouldn't work. but my users don't dial access codes. i build a dsc for each phone, or group of phones.. all 17's (1700-1799) go to pri x to an opt 11, all 8000 series sets go to the cisco call manager.. by doing that, and using dsc'd, marking my t1's as internal, matching the pni numbers, adding that pni to my cdb.. i get names and dn's on all switches..

john poole
bellsouth business
columbia,sc

 

[ccarmock]

Thanks John,

Do you get full DN & name info passed to Cisco call manager? I have a call manager connected via a Westell box to my Option81C (the 81C sees this as a DPNSS connection), but only DNs pass accross, not names.

I assume now a SIP connection woudl work natively between these boxes? I am told by Nortel that on Rls 4.0 software and also ITG trunk 3.0 I am ready to make SIP connections.

Regards
Clive

 

[johnpoole]

yes, we are using 4 digit dn's and we get that number and the ld 95 name to the ccm

john poole
bellsouth business
columbia,sc

 

[ccarmock]

Thanks John,

Out of interest waht sort of conection do you have between the Nortel box & the Cisco ?

Regards
Clive

 

[mluckie1]

DSC Distant Steering Code, Sends call to remote site through RLI with all numbers dialed. Make sure ESN Data Block is set correctly. Example 72XXXX send 72XXXX across the DChannel to other site.
LSC Local Steering Code, setup at local site will delete digits that are programed as LSC. In above example would delete the 72 from the dialed number leaving the XXXX.
TSC Trunk Steering Code, allows ACOD to be sent across the network to the remote site, giving access to the route with that ACOD. Example TSC X sends call to remote site where X is the ACOD for the RDB for outcalling.
Check to make sure ESN Data block is programed correctly. John's example does not use LSC because the actual extension number is being used. In Networks where the dialing plans are not as accomadating then LSC's will delete the DSC sent accross the span. In ESNDB CDP yes and the number of digits is equal to the Steering Code + Extension length, for 72xxxx 6 is the length. This would also effect name and number displayed at far end.