Advice Of Charge Services For Euro Isdn - AudioCodes E-SBC User Manual

CHAPTER 28 Configuring Supplementary Services
The feature is applicable only to the Euro ISDN protocol variant.

Advice of Charge Services for Euro ISDN

Advice of charge (AOC) is a pre-billing function that tasks the rating engine with calculating the cost
of using a service and relaying that information back to the customer (caller). This allows users to
obtain call charging information periodically during the call (AOC-D) or at the end of the call (AOC-
E).
AOC messages are sent in the EURO ISDN Facility Information Element (IE) message. The
device interworks these ISDN messages with SIP by converting the AOC messages into SIP
INFO (during call) and BYE messages (end of call) using the AudioCodes proprietary SIP AOC
header, and vice versa. The device supports both currency (monetary units) and pulse (non-
monetary units) AOC messages.
This feature can typically be implemented in the hotel industry, where external calls made by
guests can be billed accurately. In such a setup, the device is connected on one side to a PBX
through an ISDN line (Euro ISDN), and on the other side to a SIP trunk provided by an ITSP. When
a call is made by a guest, the device first sends an AOC-D Facility message to the PBX indicating
the connection charge unit, and then sends subsequent AOC-D messages every user-defined
interval to indicate the charge unit during the call. When the call ends, the device sends an AOC-E
Facility message to the PBX indicating the total number of charged units.
The feature is applicable only to Euro ISDN PRI and BRI.
The device supports various AOC methods:
■ Tel-to-IP Direction: The device converts the AOC messages received in the EURO ISDN
Facility IE messages into SIP INFO and BYE messages using the proprietary SIP AOC
header.
■ Device Generation of AOC to Tel: The device generates the metering tones according to
user-defined amounts, intervals, currency type, and multiplier. For more information, see
Configuring Charge
■ IP-to-Tel Direction:
● SIP-to-Tel interworking: The device uses the AOC header from the IP side and sends to
Tel in EURO ISDN Facility IE messages. Below shows the SIP AOC header:
AOC: charged; <parameters>
Where parameters can be:
◆
◆
If "currency", the following parameters are available:
◆
◆
◆
◆
If "pulse", the following parameter is available:
◆
The device can also receive AOC data in the SIP INFO message containing an
'application/vnd.etsi.aoc+xml' body. For example:
Codes.
state="active" or "terminated"
charging-info="currency" or "pulse"
currency=<string>
currency-type="iso4217-a" or <string>
amount=<number>
multiplier=("0.001","0.01","0.1","1","10","100","1000")
recorded-units=<number>
Mediant 1000 Gateway & E-SBC | User's Manual
- 684 -