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Quick Installation Guide 3. Configuring the MediaPack
Version 5.0 27 September 2007
Modifying PBX, Local, and National Calls to E.164 Format for Inbound Calls: Inbound
calls refer to calls received by OCS clients connected through IP to the Office
Communications Server 2007.
1. Local calls from the PBX or PSTN: the PBX user only dials a 4-digit extension number
of the OCS client (e.g., 1220). The gateway's Manipulation table is configured to
normalize the number into E.164 format and adds the prefix +1206333 to the extension
number. Therefore, the gateway sends the number +12063331220 to Office
Communications Server 2007, which relays the call to the OCS client.
2. National calls with the same area code: the PSTN user dials a 7-digit phone number
(e.g., 333-1220), which is received by the gateway. The gateway's Manipulation table is
configured to normalize the number into E.164 format and adds the prefix +1206 to the
number. Therefore, the gateway sends the number +12063331220 to Office
Communications Server 2007, which relays the call to the OCS client.
3. National calls from a different area code: the PSTN user dials the national area code
and then a 7-digit phone number (e.g., 206-333-1220), which is received by the
gateway. The gateway's Manipulation table is configured to normalize the number into
E.164 format and adds the prefix +1 to the number. Therefore, the gateway sends the
number +12063331220 to Office Communications Server 2007, which relays the call to
the OCS client. Note: Whether the area code is received by the gateway depends on
the country's PSTN numbering rules.
4. International calls: The PSTN international (overseas) caller dials the international
access and country code (e.g., 001 for the US), the national area code, and then a 7-
digit phone number (e.g., 206-333-1220), which is received by the gateway. The
gateway's Manipulation table is configured to normalize the number into E.164 format
by removing the first two digits (e.g., 00) and adding the prefix plus sign (+). Therefore,
the gateway sends the number +12063331220 to Office Communications Server 2007,
which relays the call to the OCS client. Note: Whether the international and country
codes are received by the gateway depends on the country's PSTN numbering rules.
The configuration of the above scenarios is shown in the figure below:
Figure 3-14: Phone Number Manipulation Table for TelÆIP Calls
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