[cisco-voip] 7940/60 and 7912 SIP image for CCM Questions

[Mark Holloway]

The SIP firmware on 7940/7960 has huge limitations compared to SCCP.  You
should only use SIP if you’re using non-Cisco IP phones.   IMHO, Cisco is
behind the times and should be pushing SIP more aggressively on their IP
phones and UCM integrated gateways.   

 

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Jason Burns
Sent: Wednesday, December 17, 2008 8:06 PM
To: Jorge L. Rodriguez Aguila
Cc: cisco-voip at puck.nether.net; Jose Mujica; Freddy Bello
Subject: Re: [cisco-voip] 7940/60 and 7912 SIP image for CCM Questions

 

I don't really recommend moving to SIP on your IP Phones. From my personal
experiences, these phones "just work" with SCCP. With SIP there are so many
"gotchas" and caveats that I wouldn't think it is worth the hassle just to
use "Open Standards".

All you'll get is a warm fuzzy feeling and higher long term support costs.

If there is no mandate from on high to use SIP - then stick with SCCP.



On Wed, Dec 17, 2008 at 9:54 AM, Jorge L. Rodriguez Aguila
<jorge.rodriguez at netxar.com> wrote:

I have a Customer that wants to start moving to Open Standards and wants to
move his phones which support SIP to SIP and leave the older not supported
models on Skinny until he starts replacing them with newer models. I see
that there is a CCM SIP image for the 7940/60. Is there anything special
needed to support these phones on the CCM as you need with native SIP phones
like say Linksys or do they just behave like their skinny based
counterparts? I guess my question is, do I still need to use stuff like the
NTP reference instead of the CCM time group or create special MTPs for these
phones as I would need for other SIP devices? Also I see there is a CCM SIP
image as well for the 7912 but it says CCM 5.0.4 only, has anyone tested
this fw with ccm 6.1.2?

 

Thanks in advance for the Help;

 

Jorge Rodríguez Aguila

CCNA,CCVP,CRMCS,CIPCES

Senior Voice/Data Network Consultant

Netxar Technologies

jorge.rodriguez at netxar.com

Office 787-765-0058

PCS 787-688-8530

netxar

 


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