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DBC4420 - how to configure
- Thread starter lalrl
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7.8 Finding out the IP address of the telephone
The DBC 420 02 does not have a display. In order to set and read parameters in the telephone, it is necessary to use the Web interface. This telephone can only be used with IP addresses received from DHCP.
One way of finding out the IP address is to use a port scanning SW, in the examples below SoftPerfect Network scanner is used, see 7.8.1 Example of scanning . To improve the received information the DBC 420 02 has a built in SNMP (Simple Network Management Protocol) agent which returns the equipment type, FW revisions and MAC-address. It is possible to scan without SNMP but in that case the MAC address will not be returned when scanning another subnet.
Another way to find the IP address is to look in the DHCP lease records, see 7.8.2 DHCP lease records .
7.8.1 Example of scanning
The scanning program in the example is a freeware program available on the Web.
See
The scanning program must be set up, it is recommended to:
scan on port 1720 (used for H.225 signalling)
set the number of retries >1. If only one ping is sent there is a risk for no hit and the telephone is not shown in the printout.
Figure 7-7. General configuration of port scanning program
The SNMP folder must also be set up, it is important to use exactly the same MIB (Management Information Base) OID (Object IDentifier) as in the example below. The OID must be set to the address: 1.3.6.1.2.1.1.1.0 to return the required data.
Figure 7-8. SNMP configuration of port scanning program
The results of the scanning is shown below. In this example the PC that executes the scanning program is located on another subnet than the scanned telephones. Therefore there are no values in the MAC address column.
The address 130.100.26.183 and 130.100.26.184 are two terminals that answer with a system description string in column SNMP.
First part , Equipment: gives the type of terminal. Valid values are DBC 420 02 and DBC 422 02.
Second part , HW/Appl/Boot version: gives the HW revision of the telephone and FW revisions of the application and boot files.
Third part , MAC, gives the MAC address of the telephone. This value should correspond to the number printed on the label under the telephone.
The addresses 130.100.26.182 and 130.100.26.187 are two terminals without SNMP agents, in this case a DBC 422 01 and a DBC 425 01.
Figure 7-9. Result of port scanning
7.8.2 DHCP lease records
Another method to find the IP address for the telephone is to look in the DHCP lease records. Look for the IP address for a certain MAC address.
7.8 Finding out the IP address of the telephone
The DBC 420 02 does not have a display. In order to set and read parameters in the telephone, it is necessary to use the Web interface. This telephone can only be used with IP addresses received from DHCP.
One way of finding out the IP address is to use a port scanning SW, in the examples below SoftPerfect Network scanner is used, see 7.8.1 Example of scanning . To improve the received information the DBC 420 02 has a built in SNMP (Simple Network Management Protocol) agent which returns the equipment type, FW revisions and MAC-address. It is possible to scan without SNMP but in that case the MAC address will not be returned when scanning another subnet.
Another way to find the IP address is to look in the DHCP lease records, see 7.8.2 DHCP lease records .
7.8.1 Example of scanning
The scanning program in the example is a freeware program available on the Web.
See
The scanning program must be set up, it is recommended to:
scan on port 1720 (used for H.225 signalling)
set the number of retries >1. If only one ping is sent there is a risk for no hit and the telephone is not shown in the printout.
Figure 7-7. General configuration of port scanning program
The SNMP folder must also be set up, it is important to use exactly the same MIB (Management Information Base) OID (Object IDentifier) as in the example below. The OID must be set to the address: 1.3.6.1.2.1.1.1.0 to return the required data.
Figure 7-8. SNMP configuration of port scanning program
The results of the scanning is shown below. In this example the PC that executes the scanning program is located on another subnet than the scanned telephones. Therefore there are no values in the MAC address column.
The address 130.100.26.183 and 130.100.26.184 are two terminals that answer with a system description string in column SNMP.
First part , Equipment: gives the type of terminal. Valid values are DBC 420 02 and DBC 422 02.
Second part , HW/Appl/Boot version: gives the HW revision of the telephone and FW revisions of the application and boot files.
Third part , MAC, gives the MAC address of the telephone. This value should correspond to the number printed on the label under the telephone.
The addresses 130.100.26.182 and 130.100.26.187 are two terminals without SNMP agents, in this case a DBC 422 01 and a DBC 425 01.
Figure 7-9. Result of port scanning
7.8.2 DHCP lease records
Another method to find the IP address for the telephone is to look in the DHCP lease records. Look for the IP address for a certain MAC address.
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