1. Call Progress Starts State Ignored First State Timing Starts Second State Timing Starts First Cadence Second Cadence Call Progress Matches Pattern 2 sec

2. Beep Dial Termination condition met

3. Root Configuration File Included Configuration File Included Configuration File Included Configuration File Included Configuration File AoB Configuration File AoH Configuration File

4. Call Progress Analysis Starts State Ignored First State Timing Starts Second State Timing Starts First Cadence Second Cadence Call Progress Analysis Matches Pattern Ring Patterns Call Progress Analysis User App PSTN

5. Energy Level dB Frequency Filter Bandwidth Nominal Frequency Detector Level Threshold A B C D Tone Detected Debounce Period Tone Detected Debounce Period PKX_EVENT_CHANNEL_TONE_OFF Tone Absent Debounce Period PKX_EVENT_CHANNEL_TONE_ON Debounce Period Debounce Period Tone Detected

6. Root Configuration File [products] aoh=product_config_file_name [groups] group0=group_name_0 [group_name_0] type=isdn product=aoh channels0=isdn0 country=us callpa=callpa_settings Product Configuration File [boards] board0=board_name_0 [board_name_0] id=0 interfacetype=t1 [isdn] isdn0=isdn_group_0 [isdn_group_0] interface0=board0,0 switchtype=ni2 node=client numbertype=national numberplan=isdn

7. [boards] board0=digital_1 [digital_1] id=1 interfacetype=t1 [isdn] isdn0=1_0 [isdn_1_0] interface0=board0,0 switchtype=ni2 node=client numbertype=national numberplan=isdn

8. Root Configuration File [products] aoh=Product_Configuration_File [groups] group0=sip_group_0 [sip_group_0] type=sip product=aoh channels0=sip0 Product Configuration File [sip] sip0=aoh_sip_group0 sip1=aoh_sip_group1

9. [boards] board0=board_name_0 [board_name_0] id=0 interfacetype=e1 clockmode=slave clocks=2 clock0=span0 clock1=span2

10. [isdn] isdn0=isdn_section_0 [isdn_section_0] interface0=board0,0 switchtype=ni2 node=client numbertype=national numberplan=isdn

11. GrandPrix SIP Local User Agent pika.com Proxy Server pika.com Registrar Server John@pika.com (5.6.7.8) Mary@yahoo.com (1.2.3.4) John@pika.com (5.6.7.8) John@pika.com (5.6.7.8) John@pika.com ? (5.6.7.8) Register John@pika.com (5.6.7.8) 1 2 3 4 5 6 7 PKX_EVENT_GROUP_ INCOMING_CALL

12. TDM User App. IP IP Phones PSTN Network PSTN Gateway User App. IP Phones User App.

13. Proxy Server (1) Proxy Server (2) User App. RTP Media Path Signalling Path Setup Messaging Path Legend SIP Client 2 SIP Client 1 Registrar Server Location Server Registrar Server Location Server SIP Client and Server Communications

14. User App port 5060 User App port 5060 Proxy Server 10.1.1.7 10.1.1.35 10.1.1.7 ext 5001 10.1.1.52 IP Network (LAN) IP Network (LAN)

15. User App port 5060 Proxy Server 192.168.68.133 ext 2004 20.2.1.15 port 5080 voip.proxy.com 47.1.1.34 User App (registrar) port 5060 IP Network ext 5002 ext 5001 ext 2001 IP Network (WAN)

16. 192.168.68.133 47.1.1.34 IP Network (WAN) 16135551155 1099 IP Network (LAN) User App PSTN Gateway