11.5.1.10. We think we're the network, but they think they're the network, too.
Jan 11 09:37:37 WARNING[3089]: chan_zap.c:8911 pri_dchannel: PRI Error: We think we're the network, but they think they're the network, too.
1) Problem and solution:
When using PRI signalling, you need to make sure that when you configure /etc/asterisk/zapata.conf that you use PRI_CPE when connecting to the carrier.
When you try to link two asterisk servers, or asterisk to another PBX, you need to make sure one end is using PRI_NET and the other one is using PRI_CPE.