Cisco Cisco IOS Software Release 15.0(1)XA

CSCtb43226 12.4 IOS MGCP generates 510 remote description error.

Voice call is rejected, because gateway replies 510 error for MDCX message.

Interworking with third party IAD device, which doesn’t support NSE codec, will mess up 

SDP format.

Disable t38 and modem passthrough so gateway doesn’t generate NSE in SDP.

CSCtb66305 Shared-dn ephone unregister affects another ephone BLF subscription.

cme on c3825-advipservicesk9-mz.124-24.T1.bin

one ephone UNREGISTER_ABNORMAL, the other ephone with shared DN will stop sending BLF 
presence subscription.

Example:

ephone 34 button 1:5 2:4

ephone 61 blf-speed-dial 1 ... button 1:5 2:4

when ephone 34 unregisters, ephone 61 stops sending presence subscription.

Use this release note with the documents and websites in this release note and the documents listed in 
the following sections:

The following documents are specific to Release 15.0 and apply to Release 15.0(1)XA:

Hardware installation guides, configuration and command reference guides, and additional documents 
specific to the Cisco 3800 series routers are available at: