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Installation & Maintenance Manual 21. Configuring Normalization Rules for E.164 Format
Version 6.8 179 Microsoft Lync Server
21 Configuring Normalization Rules for E.164
Format
Lync 2013 implements the standard E.164 format, while the PBX or PSTN implements
other number formats for dialing. If the PSTN Gateway is connected to a PBX or directly to
the PSTN, the PSTN Gateway may need to perform number manipulations for the called
and/or calling number to match the PBX or PSTN dialing rules or to match Lync 2013
E.164 format.
Therefore, the PSTN Gateway must be configured with manipulation rules to translate (i.e.,
normalize) numbers dialed in standard E.164 format to various formats, and vice versa.
Manipulation needs to be done for outbound calls (i.e., calls received from Lync clients
through Lync 2013) and inbound calls (i.e., calls destined to Lync clients).
Number manipulation (and mapping of NPI/TON to SIP messages) rules are configured in
the following Manipulation tables:

For Tel-to-IP calls:
• Destination Phone Number Manipulation Table for Tel-to-IP Calls
• Source Phone Number Manipulation Table for Tel-to-IP Calls

For IP-to-Tel calls:
• Destination Phone Number Manipulation Table for IP-to-Tel Calls
• Source Phone Number Manipulation Table for IP-to-Tel Calls
Number manipulation configuration examples are provided for inbound and outbound calls
in Section 0 on page 183 .

To configure number manipulation rules:
1. Open the required number Manipulation table ( Configuration tab > VoIP menu > GW
and IP to IP > Manipulations ); the relevant Manipulation table page is displayed
2. Click the Add button; the following dialog box appears:
Figure 21-1: Number Manipulation Table - Add Dialog Box
3. Click the Rule tab, and then configure the matching characteristics. For a description
of the parameters, see the table below.