Network Alternate Route Selection

[coniglio]

I am familiar with BARS but what exactly is NARS used for? Specifically, what does "network" apply to? What is the difference between Basic and Network ARS? thank you.

 

[hawks]

NARS has the ability to translate location codes while BARS translates codes used for on-net dialing as Special Numbers.

Look at book 553-2751-100
"Basic & Network Alternate Route Selection Gen. Description"
great reading if you have trouble falling asleep.

 

[johnpoole]

hawks is correct, but with the newer release, their is very little difference in the two, unless your taking a test

john poole
bellsouth business
columbia,sc

 

[coniglio]

how does the NIT timer affects BARS? or does it only affect NARS? Is there a BARS equivalent to NIT? In other words, how can I determine how long a call will take to go out if I have entered fewer digits than what the FLEN is set to?

 

[johnpoole]

your nit and eod timers will expire in that order. then the call goes to bars/nars.. a # after the last digit will bypass those timers

john poole
bellsouth business
columbia,sc

 

[coniglio]

so the NIT IS applicable to BARS? not just NARS? thanks JohnPoole.

 

[johnpoole]

it is a timer that must expire before the call is routed..

john poole
bellsouth business
columbia,sc

 

[coniglio]

thanks JohnPoole

 

[Avaya911PLM]

Sorry John, EOD has no bearing on digit processing within NARS/BARS. It is used on inbound DID as an interdigit timer, and is used for psuedo answer supervision on analog trunks if answer supervision is not recieved.

There are 2 things that control end of dialing within NARS/BARS:

1.) NIT timer expiration
2.) Forced end of dialing with a '#'


--
Fletch
Visit the Nortel Technical Support Portal at:

http://www.nortelnetworks.com/support

 

[johnpoole]

thanks fletch, i was mistaken if that is the case and i have no reason to disagree. question on that. with no flen set, the time between the last digit and routing seems much longer then the standard inter digit timer. on oneway out trunks the eod is not in play ?

john poole
bellsouth business
columbia,sc

 

[Avaya911PLM]

John the EOD is in play, just not with the BARS processing. EOD comes into play for DTMF generation over the audio path (after the dialed number is sent). The most common EOD problem is for an SPN to 1800 with FLEN 0. Before the system will generate DTMF over the audio path (not the number but the PIN for numeric pagers for example), FLEN has to expire, as well as EOD.

Trimming each of these prevents the problem. Using the '#' terminates all of the timers.

With 911 calls, keep in mind the far end. If the PSAP is connected via PRI, the call setup time is minimal. If the PSAP is connected via CAMA, the call setup can be extended by 6 seconds while the CAMA trunk pulses the ESN, ALI, and other information to the PSAP. If the PSAP has both interfaces into the 911 clound, you may get inconsitent call setup times.



--
Fletch
Visit the Nortel Technical Support Portal at:

http://www.nortelnetworks.com/support