Some interesting comparisons between Skype for Asterisk and Skype for SIP. Both providing ways to integrate your PBX with the popular Skype voice network

 Skype for Asterisk (SFA) is a paid license, R450 per channel once off. Skype for SIP (SFS) is free.

•SFA can handle incoming Skype calls from any user on the Skype network. SFS can receive incoming calls from Skype users only by statically mapping a Skype name to a SIP account.

•SFA can place calls to any user on the Skype network. SFS cannot place calls to Skype users.

•SFA includes support for Skype presence information. SFS has no support for presence.

•SFA includes buddy list management. SFS has no buddy list management features.

•SFA supports incoming calls directly from SkypeIn DID numbers. SFS does not.

•SFA supports multiple media codecs including G.711 aLaw and uLaw as well as G.729. Wideband audio will be available in a near-term revision. SFS supports only compressed telephony-grade G.729 media streams.