Communication between IP-EXT16 & IP-PT

1. Communication between IP-EXT16 & IP-PT

2. General configuration Default gateway: 192.168.1.1 L2 SW-Hub Repeater-Hub IP-EXT16 Monitor by Ethereal KX-TDA0470 KX-NT136 PC 192.168.1.100 192.168.1.200 192.168.1.10

3. Case-1a (1/4) IP-EXT16 was not connected to the network. Physical disconnection IP-EXT16 KX-TDA0470 KX-NT136 PC

4. Case-1a (2/4) Power-ON IPL Starting... KX-NT136 Now Loading Searching... 20-30 sec POOR LAN CONNECTION keep retrying

5. Case-1a (3/4) ARP request MAC Address of IP-PT Protocol: ARP Source : KyushuMa_30:2f:80 Destination : Broadcast IP Address of IP-EXT Info: Who has 192.168.1.100? Tell 192.168.1.200 IP Address of IP-PT

6. Case-1a (4/4) (1) ARP(Address Resolution Protocol) was sent by IP-PT for finding the MAC address of IP-EXT. (2) But no response came from IP-EXT because it has physical connection problem. (3) After the several trial of ARP, IP-PT displayed “POOR LAN CONNECTION”.

7. Case-1b (1/6) IP address of IP-EXT16 was wrong at IP-PT setting. 192.168.1.100 Connection Request 192.168.1.10 is address of PC. IP-EXT16 KX-TDA0470 KX-NT136 PC Setup as PBX = 192.168.1.10

8. Case-1b (2/6) Power-ON IPL Starting... KX-NT136 Now Loading Searching... Searching…. 40 sec POOR LAN CONNECTION keep retrying

9. Case-1b (3/6) ARP response MAC Address of PC Protocol: ARP Source : Matsushi_2b:df:c3 MAC Address of IP-PT Destination : KyushuMa_30:2f:80 Info: 192.168.1.10 is at 00:80:45:2b:df:c3 MAC Address of PC

10. Case-1b (4/6) PTAP connection request Protocol: UDP IP Address of IP-PT Because PTAP is not the common protocol, it is displayed as UDP and unknown binary data. Source : 192.168.1.200 Destination : 192.168.1.10 PTAP Port of IP-PT IP Address of PC Info: Source port 9301 Destination port 9300 PTAP Port of IP-EXT

11. Case-1b (5/6) ICMP destination unreachable Protocol: ICMP IP Address of PC Source : 192.168.1.10 Destination : 192.168.1.200 Info: Destination unreachable IP Address of IP-PT

12. Case-1b (6/6) (1) ARP(Address Resolution Protocol) was sent by IP-PT for finding the MAC address of IP-EXT. (2) ARP was resolved by the answer from PC(wrong). (3) IP-PT sent PTAP(connection request) to PC(wrong). (4) Because PC can not respond the packet to port 9300, PC responded by ICMP to reject the packet from IP-PT. (5) Because the connection ACK by PTAP was not presented, “POOR LAN CONNECTION” was displayed .

13. Case-2 (1/5) In the Normal mode of IP-EXT16, unregistered IP-PT was started. Connection Request NAK IP-EXT16 KX-TDA0470 KX-NT136 PC

14. Case-3 (2/5) Power-ON IPL Starting... KX-NT136 Now Loading Searching... Searching…. UNREGISTERED SERVER keep retrying

15. Case-2 (3/5) PTAP connection request Protocol: UDP IP Address of IP-PT PTAP Port of IP-PT Source : 192.168.1.200 Destination : 192.168.1.100 Info: Source port 9301 Destination port 9300 PTAP Port of IP-EXT IP Address of IP-EXT

16. Case-2 (4/5) PTAP NAK Protocol: UDP IP Address of IP-EXT PTAP Port of IP-EXT Source : 192.168.1.100 Destination : 192.168.1.200 Info: Source port 9300 Destination port 9301 IP Address of IP-PT PTAP Port of IP-PT In case of NAK, the data size of PTAP response from IP-EXT is small.

17. Case-2 (5/5) (1) ARP(Address Resolution Protocol) was sent by IP-PT for finding the MAC address of IP-EXT. (2) ARP was resolved by the answer from IP-EXT. (3) IP-PT sent PTAP(connection request) to IP-EXT. (4) Because IP-PT was not registered, IP-EXT in Normal mode responded by NAK. (5) Because the connection NAK by PTAP was presented, “UNREGISTERED SERVER” was displayed .

18. Case-3 (1/7) In the Registration mode of IP-EXT16, unregistered IP-PT was started. Connection Request ACK IP-EXT16 KX-TDA0470 KX-NT136 PC

19. Case-3 (2/7) Power-ON IPL Starting... KX-NT136 Now Loading Searching... Searching…. Server Connecting... ON-Line

20. Case-3 (3/7) PTAP ACK Protocol: UDP IP Address of IP-EXT PTAP Port of IP-EXT Source : 192.168.1.100 Destination : 192.168.1.200 Info: Source port 9300 Destination port 9301 IP Address of IP-PT PTAP Port of IP-PT In case of ACK, the data size of PTAP response from IP-EXT is bigger.

21. Case-3 (4/7) MGCP RSIP Protocol: MGCP IP Address of IP-PT Source : 192.168.1.200 Destination : 192.168.1.100 Info: RSIP (Restart In Progress) IP Address of IP-EXT Because MGCP is one of the common protocol, we can easily find it from the log. This message is reporting the fact to the IP-EXT that the IP-PT is restarting now.

22. Case-3 (5/7) PTAP alive check Protocol: UDP IP Address of IP-PT PTAP Port of IP-PT Source : 192.168.1.200 Destination : 192.168.1.100 Info: Source port 9301 Destination port 9300 IP Address of IP-EXT PTAP Port of IP-EXT This message is the alive check message from IP-PT to IP-EXT.

23. Case-3 (6/7) PTAP alive check response Protocol: UDP IP Address of IP-EXT PTAP Port of IP-EXT Source : 192.168.1.100 Destination : 192.168.1.200 Info: Source port 9300 Destination port 9301 IP Address of IP-PT PTAP Port of IP-PT This is the response message for alive check returned from IP-EXT to IP-PT.

24. Case-3 (7/7) (1) ARP(Address Resolution Protocol) was sent by IP-PT for finding the MAC address of IP-EXT. (2) ARP was resolved by the answer from IP-EXT. (3) IP-PT sent PTAP(connection request) to IP-EXT. (4) Because IP-PT was not registered, IP-EXT in Registration mode responded by ACK as the sign of the registration completed. (5) Because the connection ACK by PTAP was presented, normal operation started at IP-PT.

25. Case-4 (1/3) In the Normal mode of IP-EXT16, registered IP-PT was started. Connection Request ACK IP-EXT16 KX-TDA0470 KX-NT136 PC

26. Case-4 (2/3) Power-ON IPL Starting... KX-NT136 Now Loading Searching... Searching…. Server Connecting... ON-Line

27. Case-4 (3/3) (1) ARP(Address Resolution Protocol) was sent by IP-PT for finding the MAC address of IP-EXT. (2) ARP was resolved by the answer from IP-EXT. (3) IP-PT sent PTAP(connection request) to IP-EXT. (4) Because IP-PT was registered, IP-EXT in Normal mode responded by ACK. (5) Because the connection ACK by PTAP was presented, normal operation started at IP-PT.

28. End