Getting started with Cisco VoIP

Answered Question
Jun 3rd, 2010
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All,


What are the components needed for a pure Cisco VoIP system? How do POTS lines get connected to the router? How does the router support multiple DIDs or is this a function of the Call Manager? Are there any good links that lays this out from the ground up?


Thanks!

John

Correct Answer by Rob Huffman about 7 years 1 month ago

Hey John,


Hope all is well


Just to add on a link to the good tips from Liam (+5 Liam!)


One of the best "starting" points for deploying IPT is

the SRND. This will describe alot of the Design, Deployment

Gateway, Endpoint etc. etc. etc. questions;


Cisco Unified Communications SRND Based on Cisco Unified Communications Manager 7.x


http://cisco.biz/en/US/docs/voice_ip_comm/cucm/srnd/7x/intro.html



Cheers!

Rob




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https://supportforums.cisco.com/docs/DOC-8895


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Correct Answer by walshliam about 7 years 1 month ago

OK,


Call processing is done by the Communications Managers (CUCM)


Typically you will have a publisher and a number of subscribers (each a seperate server). The pub contains your database and is the point of admin while the subs do all the call processing work. each sub can handle up to 7500 phones. You can have 4 active subs for 30000 phones, and 4 standby subs. You can also have seperate servers for TFTP and other servies.


Endpoints can be Cisco phones, Analog phones attached to voice Gateways (VG224), SIP end points etc. or "soft phones" that run on laptops or even iPhones.


Connection to the pstn can be by SIP Trunk, T1/E1, or simple FXO. interfacing to the pstn is done through a switch or router with interface cards. you can have a 2811 router with T1 interfaces or FXO interfaces or a 6500 series Catalyst switch with 6 T1 ports per module.



HTH, let me know if I can give anymore info.


Liam

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walshliam Thu, 06/03/2010 - 08:47
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How many users are you looking at?


Have any Cisco experiance ? CCNA?


I would recommend CVOICE or CCNA Voice as a first step provideed you understand CCNA material.

John Blakley Thu, 06/03/2010 - 08:56
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I hold a CCSP and CCNP....I'm assuming that you're only wanting a starting point to gauge my Cisco experience. Either way, I just need to know the pieces that's required for a phone system.


In the Avaya world, I would have a phone switch, modules for my pots lines to connect to, and then the phone switch connects to my switch. Currently, I have VLANs that segment traffic for voice between floors (I have two separate subnets that run over the same phone system outside of my data vlan). As far as managing the Avaya system, I don't really do that piece of it, but I've used ASA (Avaya Site Admin) in order to set up extensions, move ports for digital phones etc.


My MAIN question is how would this translate to a Cisco implementation? Do I have a PBX that will be between the telco and my router OR does the telco line connect directly to the router through a voice card? Obviously, I'm not a voice guy but I understand enough of it for someone to give me a starting point and I can do the research. I just don't know where that starting point is.


John

Correct Answer
walshliam Thu, 06/03/2010 - 09:07
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OK,


Call processing is done by the Communications Managers (CUCM)


Typically you will have a publisher and a number of subscribers (each a seperate server). The pub contains your database and is the point of admin while the subs do all the call processing work. each sub can handle up to 7500 phones. You can have 4 active subs for 30000 phones, and 4 standby subs. You can also have seperate servers for TFTP and other servies.


Endpoints can be Cisco phones, Analog phones attached to voice Gateways (VG224), SIP end points etc. or "soft phones" that run on laptops or even iPhones.


Connection to the pstn can be by SIP Trunk, T1/E1, or simple FXO. interfacing to the pstn is done through a switch or router with interface cards. you can have a 2811 router with T1 interfaces or FXO interfaces or a 6500 series Catalyst switch with 6 T1 ports per module.



HTH, let me know if I can give anymore info.


Liam

Correct Answer
Rob Huffman Thu, 06/03/2010 - 09:39
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Hey John,


Hope all is well


Just to add on a link to the good tips from Liam (+5 Liam!)


One of the best "starting" points for deploying IPT is

the SRND. This will describe alot of the Design, Deployment

Gateway, Endpoint etc. etc. etc. questions;


Cisco Unified Communications SRND Based on Cisco Unified Communications Manager 7.x


http://cisco.biz/en/US/docs/voice_ip_comm/cucm/srnd/7x/intro.html



Cheers!

Rob




Please support CSC Helps Haiti


https://supportforums.cisco.com/docs/DOC-8895


https://supportforums.cisco.com/docs/DOC-8727

John Blakley Thu, 06/03/2010 - 10:20
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Awesome explanation Liam! Thanks!


Rob, it's been a while since we've last spoke. Hope you're doing well! Thank you for the link, and now I have some reading to do


John

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