PJSIP Contact Header vs Chan_sip on Asterisk 13

[carlfarrington]

It works if you configure the Cisco phones this way:

Cisco SPA 5xx BLF Call Pickup with Asterisk 13.7.2

Just to save anyone else the 6+ hrs I’ve just spent on this… BLF + Call pickup, in fact call pickup alone (without BLF or speed dial function) from the line keys or attendant console on Cisco SPA phones (firmware 7.6.1) would not work at all, unless the System Type was set to Broadsoft, and the extended function given both the sub=extn#@$PROXY and the ext=extn#@$PROXY (or you can say usr= instead of ext=, they are synonymous with each other). Directed Call Pickup would not work (would not wo…