asterisk*CLI> sip show channels
Peer             User/ANR    Call ID          Format           Hold     Last Message    Expiry
192.168.0.30     line3       91ca56a-5b25848  0x4 (ulaw)       No       Rx: INVITE                
64.61.93.190     ocY97PJM89  5b5ad3612dca3e7  0x4 (ulaw)       No       Rx: INVITE                
2 active SIP dialogs
asterisk*CLI> sip show history 5b5ad3612dca3e7
asterisk*CLI> 
  * SIP Call
1. Rx              INVITE / 102 INVITE / sip:19192460171@64.105.202.244:5060
2. NewChan         Channel SIP/VoicePulse-Primary-Brendan-1073d4c0 - from 5b5ad361
3. TxResp          SIP/2.0 / 102 INVITE - 100 Trying

asterisk*CLI> sip show channels
Peer             User/ANR    Call ID          Format           Hold     Last Message    Expiry
67.108.9.165     ocY97PJM89  101babe656d9d0c  0x0 (nothing)    No                                 
192.168.0.30     line3       91ca56a-5b25848  0x4 (ulaw)       No       Rx: INVITE                
64.61.93.190     ocY97PJM89  5b5ad3612dca3e7  0x4 (ulaw)       No       Rx: INVITE                
3 active SIP dialogs
asterisk*CLI> sip show history 91ca56a-5b25848
asterisk*CLI> 
  * SIP Call
1. Rx              INVITE / 101 INVITE / sip:8000@asterisk.crosscomm.net
2. AuthChal        Auth challenge sent for  - nc 0
3. TxRespRel       SIP/2.0 / 101 INVITE - 401 Unauthorized
4. SchedDestroy    6400 ms
5. Rx              ACK / 101 ACK / sip:8000@asterisk.crosscomm.net
6. Rx              INVITE / 102 INVITE / sip:8000@asterisk.crosscomm.net
7. CancelDestroy   
8. Invite          New call: 91ca56a-5b258487@192.168.0.30
9. AuthOK          Auth challenge succesful for line3
10. NewChan         Channel SIP/line3-10734370 - from 91ca56a-5b258487@192.168.0.30
11. TxResp          SIP/2.0 / 102 INVITE - 100 Trying