Call routing question

[jetb]

hi all! i'm new with PBX stuff. i am currently supporting a meridian 11c. i'm already familiar with modifying the keys in a tn. i just want to know how I can get the call routing information, like if I dial 3xxx, it goes to another pbx...

also, if for example, we have an NY pbx, how can I check if there's an access code (or a route) that can allow me to call any number in NY through the NY pbx (making it a local call) from say a pbx in San Francisco? how about if the NY pbx not directly connected to SanFrancisco pbx, instead the SanFrancisco pbx is connected first to Chicago pbx, then Chicago pbx is connected to NY pbx.

sorry for the long question but I'm trying to compare the routing with that of a data network, which I am more familiar with.

many thanx

 

[rhack5565]

What you are asking can all be accomplished. It would take quite awhile to explain how to do it here. You need to bone up on BARS & NARS & CDP. Check out GHTROUT.com

Look for the BARS101 file, it is a quick run down on routing.

 

[jetb]

thanx. the article is great but i think it only covers when you dial 91xxxxxxxxx. what about internal numbers within the PBX network? I also have other questions below.

1. which is the catch all in the routing configuration in that if the area code is not listed in npa, the call is denied?

2. in routing calls within an organization pbx, does the routing have to be defined on each pbx or is there a dynamic routing protocol like RIP, OSPF, EIGRP, BGP in data network?
3. is it possible to block incoming calls based on the area code? where can it be configure?

4. why does an incoming call show only the number? can it be configured also to show the name provided by the telco?
5. can an incoming call without caller ID be block per terminal number or does it have to be system wide?

 

[rhack5565]

thanx. the article is great but i think it only covers when you dial 91xxxxxxxxx. what about internal numbers within the PBX network?

There are two principle methods. CDP, and NARS. CDP is Coordinated Dial Plan, this will allow you to perform abbreviated dialing between facilities. The other is by defining Location codes (LOC) in one of your AC's. With NARS there are two AC's (access codes) typically AC1=9 for 9+dialing, the other may be reserved for private a dial plan. For large networks NARS is the way to go, for a few systems you can probably get by with CDP.


1. which is the catch all in the routing configuration in that if the area code is not listed in npa, the call is denied?

You are correct! If it isn't programmed, its not routing.

2. in routing calls within an organization pbx, does the routing have to be defined on each pbx or is there a dynamic routing protocol like RIP, OSPF, EIGRP, BGP in data network?

I wish there was a dynamic routing protocol. Typically,each PBX in a network has its own routing translations, reason being calls route off of facilities that are physically connected to it. For CDP or NARS networks, one switch could be designated a "Main", you create a simple dial plan within your PBX, that passes certain call types to the "Main", the Main can then do the full screening to determine where to switch the call to.



3. is it possible to block incoming calls based on the area code? where can it be configure?

I do not believe this is possible. There are ways to deny calls coming from other PBX's by use of ITGE (Incoming Trunk Group Exclusion Index) tables.


4. why does an incoming call show only the number? can it be configured also to show the name provided by the telco?

I beleive there is a new feature package coming out which will allow Calling Name over PRI from the PSTN. Someone else help me out here! The CLID/Name feature you have at home uses CLASS functionality, different than ISDN on your PRI trunks.

5. can an incoming call without caller ID be block per terminal number or does it have to be system wide?

I do not believe this is possible. Again, someone help me out here.