# Switching from Asterisk1.2 to Asterisk1.4

**URL:** <https://community.asterisk.org/t/switching-from-asterisk1-2-to-asterisk1-4/11938>\
**Category:** Asterisk General\
**Created:** [January 26, 2007, 8:06am UTC](https://community.asterisk.org/t/switching-from-asterisk1-2-to-asterisk1-4/11938 "2007-01-26T08:06:03Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![kwahid](https://avatars.discourse-cdn.com/v4/letter/k/45deac/32.png) [@kwahid](https://community.asterisk.org/u/kwahid)\
**Post date:** [January 26, 2007, 8:06am UTC](https://community.asterisk.org/t/switching-from-asterisk1-2-to-asterisk1-4/11938/1 "2007-01-26T08:06:03Z")

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Hi

i want to know about the possible threats or issues while switching an existing PBX already developed on Asterisk 1.2 to latest version Asterisk 1.4.What modifications will b required and what incompatibilities exist in two versions?

Please share experiences if anyone is doing or have done this job.

Thanks in advance,  
kwahid

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**Author:** ![baconbuttie](https://sea1.discourse-cdn.com/asterisk/user_avatar/community.asterisk.org/baconbuttie/32/916_2.png) [@baconbuttie](https://community.asterisk.org/u/baconbuttie)\
**Post date:** [January 26, 2007, 8:12am UTC](https://community.asterisk.org/t/switching-from-asterisk1-2-to-asterisk1-4/11938/2 "2007-01-26T08:12:32Z")

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wasn’t there a thread posted in the last 2 days asking this ?

in the 1.4 source, look for, and read, then read again the files README, UPGRADE.txt and CHANGES