Nortel ISDN Signaling Link, Description, Installation And Operation

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Description Page 63 of 378
ITG Trunk 2.0 ISDN Signaling Link (ISL) Description, Installation and Operation
Note: Do not install a modem router on the E-LAN without the explicit
approval of the customer's IP network manager. The RM356 modem
router is not secure unless it is configured correctly according to the
customer's network security policy and practices.
Alternatively, the PC application, pcANYWHERE
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, can be installed in host
mode on the MAT PC to provide remote access to any PC with a modem. The
remote user dials the MAT PC which contains the required ITG data (whether
stored locally or on a MAT server). Once connected, the remote user can
perform any operation available to that PC.
Per-call statistics support using RADIUS Client
The ITG architecture isolates the IP voice interface from the Meridian 1.
However, the Meridian 1 does not have direct access to per-call statistics on
the voice quality of the call. These statistics are important for the purpose of
the following:
• make sure the network is providing the contractual service level
• solve help desk inquiries or refund “bad call” charges
• identify network problems and track network performance
ITG uses a Remote Authentication Dial In User Service (RADIUS) client to
transmit these statistics from the ITG ISL Trunk card to a network device:
• ITG ISL Trunk card sends a Start record when a call begins.
• ITG ISL Trunk card sends an End record when the call is released.
• The End record contains QoS information and the amount of data sent.
• Both records contain the Called and Calling Party numbers for call
identification.
• The MAT Call Accounting application does not correlate RADIUS per
call statistics with the Meridian 1 CDR.
A network “listener” receives Start and End messages and stores the data.
Applications can retrieve the stored data for processing and presentation to
the user.