Aastra Telecom 800 manual Voice over IP VoIPVoIP System Telephones

Voice over IP (VoIP)VoIP System Telephones

Telephone type	File name
Aastra 6773ip	/ram/ip_tel/opi7x.cnt
(OpenPhone 73 IP)
Aastra 6775ip	/ram/ip_tel/opi7x.cnt
(OpenPhone 75 IP)
RFP 31/32/33/34/41/42	/ram/ip_tel/ip_rfp.cnt

After the VoIP system telephone has been connected to the mains power supply, the start procedure is as follows:

1.The boot loader starts and shows the VoIP system telephone’s MAC address in the display. A DHCP request is sent simultaneously via broadcast on the 255.255.255.255 broadcast address.

2.An IP address, network mask and the default gateway for the start procedure are sent from the DHCP server. Via the “Next server” option, the DHCP server also provides the TFTP server’s IP address and the operations software’s file name. The DHCP server uses the MAC address to select the operations software file which matches the type of device.

3.The boot loader loads the approximately 2 MB operations software file from the specified TFTP server. The TFTP server’s IP address and the file’s name are shown in the display. The loaded operations software is started.

4.The operations software sends a DHCP request on the broadcast address 255.255.255.255. The VoIP system telephone now receives an IP address, network mask and default gateway for operations from the DHCP server. Using “Option 43”, which is reserved for this purpose, the DHCP server also provides the IP address of the communications system and port number 8100 for regis- tration.

5.The VoIP system telephone creates a TCP connection to the supplied IP- address/port-number combination and sends a registration query. The Aastra 800 checks the MAC address sent with the registration and confirms the registration request if the VoIP system telephone is listed in the menu Telephony: Devices: VoIP Phones. The keep-alive time, port number (8101) for telephony signalling and the value to use for the TOS byte are also commu- nicated in the registration answer.

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