IOS upgrade (C2900-UNIVERSALK9-M), Version 15.3 to support 7821,CP8821

[Muhsin]

Hi

I would like to add add multiple new IP phones models 7821 and CP8821 to the CME on ISR 2921 router, But current IOS/CME version does not support these phone models (flash:c2900-universalk9-mz.SPA.153-1.T.bin) , So I want to upgrade IOS on ISR 2921 router, I know that these series are EOL and no support from cisco. Which version IOS and CME should I upgrade to support these models. If it is CME 10.5 I need to upgrade to IOS 15.4.3M, Here is my question can I upgrade directly to 15.4.3 M from 15.3.1.T 

@Jitender Bhandari @Deepak Rawat 

Cisco IOS Software, C2900 Software (C2900-UNIVERSALK9-M), Version 15.3(1)T, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2012 by Cisco Systems, Inc.
Compiled Mon 26-Nov-12 14:52 by prod_rel_team

ROM: System Bootstrap, Version 15.0(1r)M15, RELEASE SOFTWARE (fc1)

EX-BS1-CME uptime is 2 years, 6 weeks, 6 days, 22 hours, 11 minutes
System image file is "flash:c2900-universalk9-mz.SPA.153-1.T.bin"
Last reload type: Normal Reload
Last reload reason: Reload Command

 

Cisco CISCO2921/K9 (revision 1.0) with 475136K/49152K bytes of memory.
Processor board ID FGL16371083
4 Gigabit Ethernet interfaces
31 Serial interfaces
2 terminal lines
1 Channelized E1/PRI port
1 Virtual Private Network (VPN) Module
6 Voice FXO interfaces
1 Services Module (SM) with Services Ready Engine (SRE)
DRAM configuration is 64 bits wide with parity enabled.
255K bytes of non-volatile configuration memory.
250880K bytes of ATA System CompactFlash 0 (Read/Write)

--More-- License Info:

License UDI:

-------------------------------------------------
Device# PID SN
-------------------------------------------------
*0 CISCO2921/K9

[Roger Kallberg]

If these phones are supported in CME on this platform it would be listed in the CME documentation. Recommend you to review it.

[Leo Laohoo]

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@Muhsin wrote:

Here is my question can I upgrade directly to 15.4.3 M from 15.3.1.T 

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Yes.

The question is this:  Will upgrading the router IOS support 7821/8821?  No, because the router do not talk to those phones.  It is the CME/CUE inside that talks to the phones.  And unless the CME/CUE inside the router is upgraded, nothing will work.  

The only way to get the 7821 to talk to an old CME/CUE version is to covert the phones to 3PCC/MPP.  

For the 8821, I would not bother.  8821is a PoS.

[Muhsin]

@Leo Laohoo 

Thanks for the reply,

So I can upgrade from 15.3.1T to 15.7.3M directly as well. CME versions are embedded with IOS,  So CME automatically upgrade with the IOS. If I upgrade to 15.7.3M CME becomes version 12.0. I hope phones 7821 and 8821 works with this CME version.

[Roger Kallberg]

If the phones are supported in the CME version is listed in the CME documentation. Advise you to review it.

[Leo Laohoo]

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@Muhsin wrote:

So CME automatically upgrade with the IOS.

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No.  CME is a totally separate component.  It is/will not "automatically upgrade".

[Roger Kallberg]

@Leo Laohoo This is incorrect. CME is included in IOS.

[Leo Laohoo]

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@Roger Kallberg wrote:

@Leo Laohoo This is incorrect. CME is included in IOS.

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Mea culpa.

Me confused with a different one.