Question

Primer on Cisco IPCC, Subscriber, Publisher and Call Manager

Asked by: vatg

Guys and Gals,

I am working with a group of people that need help with their VoIP upgrade. I am working with them on the network side, so that part is not a problem. However, they are always talking about all the components and I have no idea what they are talking about. I feel at a loss as to what a subscriber, publisher is. How they interact with Call Manager and IPCC.

Any help would be appreciated. Are there any website that have it as a Cisco VoIP 101 or something of the sort?

Thank you,

V

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Asked On
2006-12-08 at 10:49:17ID22087318
Tags

cisco

,

publisher

,

subscriber

,

call

,

manager

Topic

Voice Over IP

Participating Experts
3
Points
500
Comments
6

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Answers

 

by: lrmoorePosted on 2006-12-10 at 10:20:55ID: 18111331

Very broad question, but here's the place to start. You can find anything you want to know about general Voip (101), Call Manager, IPCC, etc
http://www.cisco.com/en/US/products/sw/voicesw/index.html

 

by: benhansonPosted on 2006-12-11 at 12:41:51ID: 18117693

An enterprise class CallManager installation will consist of at least 2 CallManager servers.  Both run SQL server.  One is the Primary CallManager server(the server that all phones register with), and one is the Secondary CallManager(phones register with this server if the other is offline).  The Secondary CallManager server is generally configured as the Publisher of the SQL database that contains all of the CallManager configuration.  The Primary CallManager is configured as a Subscriber to this SQL database.

Thus in a 2 server environment you would have:
ServerA = Primary CallManager/SQL Subscriber
ServerB = Secondary CallManager/SQL Publisher

If you add a 3rd server, you might have:
ServerA = Primary CallManager/SQL Subscriber
ServerB = Secondary CallManager/SQL Subscriber
ServerC = Tertiary CallManager/SQL Publisher

The general idea here is that the SQL publisher shouldn't be the front line server for phone registrations.  I'm not familiar with IPCC, so I can't comment there.

 

by: KiyamKadirPosted on 2006-12-13 at 22:45:55ID: 18137030

What your colleagues refer to is easy:

a publisher is normally used as a term for a Cisco Call Manager Primary Server.
it is called a publisher due to one simple fact of the database:  the database used is Microsoft SQL 2000 Server.

in MSSQL 2000 you can have a master DB that stores data and publishes them to other servers that have subscribed to this table or DB.

Now comes the trick:

The first Call Manager that you install will be a publisher as it will contain the only READ/WRITEABLE Database inside a Cisco Call Manager Cluster.

All additional servers will be used to share load and to read (subscribe) their data from the first call manager (publisher).

This is what is meant by publisher and subscriber.


Cisco IPCC is a IP Contact Center and used to handle calls, emails, http requests etc to and from a contact center environment.

it is like a huge routing engine that can handle mutliple channels of data.

A Cisco VoIP 101 i dont know but i am a CCIE VOICE and you can ask anytime you like.


i hope i was of assistance.

 

by: benhansonPosted on 2006-12-14 at 10:23:06ID: 18140780

Just to clarify KiyamKadir's note, the Publisher is not necessarily the Primary CallManager server.  In fact, Cisco recommends that the Publisher not be the Primary.  The Primary CallManager server is the server that all phones will register to first.  Cisco recommends that the Primary server be one of your Subscribers(from a SQL standpoint).

20120131-EE-VQP-002

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