I want to upgrade my IOS, i think its pretty old now.(see infos bellow)
But when i go on "cisco downloads" i see several version of ios, (sp service, adv entreprise,...)
*which one should i take ?
*Do i need to install the ios + other features pkg?
*is it erase my configuration ?
*Also i want to install another language package, permit the multilinguage, how to proceed ?
thanks in advance
About Cisco CallManager Express
Operating System: Cisco Internetwork Operating System. Cisco IOS (tm) C2800NM
Cisco IOS Software: C2800NM-SPSERVICESK9-M
Software Version: 12.4(3h) / CME 3.3
Feature Package: IP|FIREWALL|VOICE|PLUS|SSH
Default # personal mailboxes: 12
Default # general delivery mailboxes: 5
Maximum # configurable mailboxes: 17
Maximum message space (minutes): 6000
Maximum telephony ports: 8
Installed Packages: Installer (Installer application) 2.2.2
Bootloader (Primary) (Service Engine Bootloader) 2.1.2
Infrastructure (Service Engine Infrastructure) 2.2.2
Global (Global manifest) 2.2.2
GPL Infrastructure (Service Engine GPL Infrastructure) 2.2.2
Voice Mail (Voicemail application) 2.2.2
Bootloader (Secondary) (Service Engine Bootloader) 2.1.2
Core (Service Engine OS Core) 2.2.2
Auto Attendant (Service Engine Telephony Infrastructure) 2.2.2
Installed Languages: English language pack (English language pack) 2.1.3