• Power supply off
The modem power supply signal (VMDM) is inhibited. Any modem connected to the port will not be
managed and will require an external power source.
The protocols managed by the meter, that can be used on the communication ports are:
Utility Port Customer Port
HDLC HDLC
IEC62056-21 IEC62056-21
TCP (GPRS or
Ethernet)
7.5. Communication management
In accordance with IEC 62056-53, security access levels of the DLMS/COSEM protocol are applied to meter
communication and interfacing.
Confidentiality and privacy of data are managed by COSEM logical devices in the meter (which can be
addressed individually) and different COSEM client identifications (connection profiles).
Each connection profile is protected by a dedicated password and all connection attempts by COSEM clients are
checked by the meter before establishing a connection.
The meter has two logical devices:
• Electricity
• Management
Several client identifications are predetermined, with different authorisations to access data:
• Electricity Utility - Laboratory
• Electricity Utility - Field
• Electricity Utility - Reader
• End customer
Client SAP Allowed logical devices Access rights
Electricity Utility
Laboratory
1 Management device
Electricity device
Full read/write
Electricity Utility
Field
2 Management device
Electricity device
Full read
Partial write
Electricity Utility
Reader
3 Management device
Electricity device
Full read
Partial write of:
• meter time setting
• end of billing
End customer 7 Management device
Electricity device
Read only
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