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H323 Profile Configuration on C20 TelePresence System

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Sat, 07/09/2016 - 08:10
Jul 7th, 2016
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Cisco Support Community

Article ID: 3464

Objective

H323 is a standard primarily used for voice and video conferencing. It determines the protocol to provide audio visual communication sessions on any packet network. This standard sees to call signaling and control, multimedia transport and control and bandwidth control for point to point and multipoint conferences.

H323 allows inter-networking of call signaling, call control and media stream control. This article explains the configuration of the H323 profile on the C20 TelePresence System.

Applicable Devices

• C20 TelePresence System

Configuration of H323 Profile

Step 1. Press the Home button to wake the device from idle and choose Settings > Administrator settings > Advanced configuration > H323 > Profile 1.

Step 2. Use the navigation keys to choose Authentication. Authentication is a one way authentication from the codec to the H323 Gatekeeper. A Gatekeeper provides address translation and controls the access to the network resources for the H323 terminals.

Step 3. Use the navigation keys to choose Login Name. The authentication Login Name is sent by the system to a H323 Gatekeeper for authentication.

Step 4. Enter the login name in the Login Name field.

Step 5. Click Save to save the login name.

Step 6. Use the navigation keys to choose Mode.

Step 7. Click the radio button to enable or disable the authentication.

• On — If this mode is set to On, then the system will try to authenticate itself to the Gatekeeper as the Gatekeeper indicates that it needs authentication. It is necessary that the authentication login name and the authentication password should be defined on both the codec and the Gatekeeper.

• Off — If this mode is set to Off, then the system will not try to authenticate itself to the Gatekeeper but will still do normal registration.

Step 8. Use the navigation keys to choose Password. The system sends the authentication password to the H323 Gatekeeper for authentication.

Step 9. Enter the password in the Password field.

Step 10. Click Save to save the password.

Step 11. Use the navigation keys to choose Call setup . This defines whether to use a Gatekeeper or direct calling when establishing H323 calls.

Step 12. Use the navigation keys to choose Mode. The mode defines whether to use a Gatekeeper or direct calling when establishing H323 calls.

Step 13. Click the mode to choose Gatekeeper or Direct.

• Direct — Makes use of an IP address to make the H323 call.

• Gatekeeper — It provide address translation and control the access to the network resources for the H323 terminals. When choosing this option both the H323 Gatekeeper address and the H323 Gatekeeper Discovery settings should be configured.

Step 14. Use the navigation keys to choose Gatekeeper.

Step 15. Use the navigation keys to choose Address.

Step 16. Enter the IP address of the Gatekeeper in the Address field.

Step 17. Click Save to save the Address.

Step 18. Use the navigation keys to choose Discovery .Used to determine how the system should register to a H323 Gatekeeper.

Step 19. Choose Discovery to set the gatekeeper in manual or auto.

• Manual – The system uses a specific Gatekeeper that is identified by the  IP address of the Gatekeeper.

• Auto – The system automatically tries to register to any available Gatekeeper.

Step 20. Use the navigation keys to choose H323 Alias. Enter the ID which can be a email ID or E164 number.This is used to address the system on a H323 gatekeeper and will be displayed in the call lists.

Step 21. Use the navigation keys to choose E164.E164 is used to define the format of the telephone numbers. E164 numbers can have a maximum of 15 digits and are usually written with a "+" prefix. In order to dial such numbers from a normal fixed line phone, the appropriate international call prefix must be used.

Step 22. Enter the number in the E164 field.

Step 23. Click Save to save the number.

Step 24. Use the navigation keys to choose ID. An ID used to resolve an address request.

Step 25. Enter the ID which can be a email ID or E164 number.

Step 26. Click Save to save the ID.

Step 27. Use the navigation keys to choose Port Allocation which affects the H245 port numbers which are used to make the H323 calls.

Step 28. Click the port allocation to choose dynamic or static.

• Dynamic — The system assigns the ports that should be used when opening a TCP connection. This is mainly done to prevent using the same port for consequent calls because this can be considered as an attack by the by some firewalls. The ports for the Dynamic range start from 11000 to 20999. Once the 20999 is reached it restarts from 11000 again.

• Static — The ports are assigned to specific connections to prevent the using of port for same work.This ranges from 5555 to 6555.

Step 29. Click Save to save the changes.

H323 Profile1 Configuration on Web Utility

Step 1. Use the web configuration utility to choose Configuration> Advanced Configuration > H323. The H323  page opens:

Step 2. Choose the mode for Call Setup from the CallSetup Mode drop-down list. This defines whether to use a Gatekeeper or Direct calling when establishing H323 calls.

• Direct — Makes use of an IP address to make the H323 call.

• Gatekeeper — It provide address translation and control the access to the network resources for the H323 terminals.When choosing this option both the H323 Gatekeeper address and the H323 Gatekeeper Discovery settings should be configured.

Step 3. Choose the type of port allocation from the PortAllocation drop-down list,  which affects the H245 port numbers used to make the H323 calls.

• Dynamic — The system will assign the ports which should be used when opening a TCP connection. This is mainly done to prevent using the same port for consequent calls because this can be considered as an attack by the by some firewalls. The ports for the Dynamic range start from 11000 to 20999. Once the 20999 is reached it restarts from 11000 again.

• Static — The ports are assigned to specific connections to prevent the using of port for same work.This ranges from 5555 to 6555.

Step 4. Enter the login name in the LoginName field and press Ok to save it.Login name is sent by the system to a H323 Gatekeeper for authentication.

Step 5. Choose to enable or disable authentication from the Mode drop-down list.

• On — If this mode is set to On, then the system tries to authenticate itself to the Gatekeeper as the Gatekeeper indicates that it needs authentication. It is necessary that the authentication login name and the authentication password should be defined on both the codec and the Gatekeeper.

• Off — If this mode is set to Off, then the system does not try to authenticate itself to the Gatekeeper but it will still perform normal registration.

Step 6. Enter the password in the Password field and press Ok to save it. The system sends the authentication password to the H323 Gatekeeper for authentication.

Step 7. Enter the gatekeeper address in the Address field and press Ok to save it. The Gatekeeper is an H323 entity which is used for address translation and controls access to the network resources for H323 terminals.

Step 8. To set gatekeeper mode choose the Mode from the drop-down list.

• Manual – The System uses a specific Gatekeeper that is identified by the IP address of the Gatekeeper.

• Auto – The system automatically tries to register to any available Gatekeeper.

 

Step 9. Enter the H323 alias E164 number  in the E164 field and press Ok to save it. E164 is used to define the format of the telephone numbers. E164 numbers can have a maximum of 15 digits and are usually written with a "+" prefix. In order to dial such numbers from a normal fixed line phone, the appropriate international call prefix must be used.

Step 10. Enter H323 alias id in the ID field and press Ok to save it. ID can be a email ID or E164 number. ID used to resolve an address request.

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