Novice Question 3

[keefbeef]

I have heard to the ELAN, TLAN and CLAN mentioned in nortel cirles.

My undestanding is that the ELAN is equipment/embedded LAN which is used to interconnect PBX equipment.

TLAN is the Telephone LAN, where the telephones are located and generally customers VLAN for voice.

Then there is the CLAN, which is the customers LAN. Which is the confusing bit - is this the same as the TLAN?

 

[Firebird Scrambler]

Yes, the TLAN and CLAN were terms used by different applications. CLAN is mentioned with Call Pilot and TLAN with Sig Servers etc.

All the best

Firebird Scrambler
Meridian 1 / Succession and BCM / Norstar Programmer in the UK

http://www.linkedin.com/in/davidbromley

If it's working, then leave it alone!.

 

[fallenangel1]

I used to be confused in the beginning like this. Then I tried to make myself clear with the help of another novice logic

CLAN or Customer LAN is the same where Traffic of the customer runs. So, CLAN (Customer LAN) = TLAN (Traffic LAN)

ELAN on the other hand is the one where Equipments within the PBX talks to each other.

Go For It Even If It's Impossible !

 

[Crowtalks]

It's recommended that you keep your TLAN separated from the customer's CLAN, by a router.

That way, when you are running screwy IP phone trouble in the future (and you will) and the customer's IT department guys try to blame your system, you can plug an IP phone into your TLAN and prove that it works fine on your LAN and that they must have issues in their LAN which is probably sharing traffic between phones and other devices.

That's the main reason for the distinction between TLAN and CLAN

NCSS NCTS NCTE

 

[peterdonnelly]

My understanding is as follows:-

ELAN is the nortel private LAN. No customer equipment needs to be able to see this LAN /VLAN. The ELAN can be but doesn't need to be routable.

TLAN - is another nortel LAN but this LAN needs to be routable so that the IP phones can talk to the SIG Server / Call Server / Callpilot.

CLAN - This is the customer LAN. Hosts and whtever else.

Personally, I like to have another network/vlan for the ip phones thenselves.

 

[Crowtalks]

I forgot to mention ELAN...as you said it's the Embedded/Equipment LAN the system components use to communicate information between devices. It is recommended that it always remains separate and unrouted...the customer doesn't even know (and doesn't need to know) it exists.

In the CS1000E you will also run across the HSP (high speed pipe) that is used to connect multiple call servers together in an HA environment for mirroring.

NCSS NCTS NCTE

 

[keefbeef]

Slightly off subject, but a quickie!

The HSP connecting two call servers should probably be fiber, especially if far apart but I was wondering what thought was there in relation to how it connects to the Call Server. The CS1000E HSP link is copper RJ45 connection.

Is it better to use fibre transcievers to convert the fibre to CAT6 and then plug directly into CS, or use a data switch to convert the link and then use a port on the switch to plug into the CS. Is that even possible?

 

[farazmangal]

To my understanding
ELAN= Specific for PBX
CLAN= Customer own LAN
TLAN=VLAN withing CLAN for PBX application/IP phone

 

[Crowtalks]

farazmangal: It is recommended by Nortel that the TLAN and CLAN be separate networks.

An example I have running is:

ELAN IP Network: 10.2.100.XXX
TLAN IP Network: 10.2.200.XXX
Customer's CLAN IP Network they assigned: 172.16.27.XXX

There is a Cisco router separating my TLAN (10.2.200.XXX) and their CLAN Network (172.16.27.XXX). They weren't happy about it being separated but they relented in the end and I have already proven on three different occasions that the IP phone trouble they have experienced has been caused within their network.

Keefbeef:
Fiber would be cleaner, but I have feet separating my call servers and I use CAT6 patch cords

NCSS NCTS NCTE