Customer (Single- or Multi-Site) Without PSTN Prefix¶
Most of the calls made by these customers are PSTN calls. The Cisco Unified Communications Manager interprets calls without any prefix as PSTN or off-net calls. To differentiate between PSTN and intra- or inter-site calls, a prefix is required.
Single or Multi-Site Customer without PSTN Prefix
| Dialing Format (A-Party) | Display Format (B-Party) | Notes | |
|---|---|---|---|
| Intra-Site Dialing (single site only) |
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Since any digit 0-9 is treated as a PSTN call, extension prefix or ISP is limited to only * or #. For a single site customer, the dialing plan for intra-site calls is just an extension prefix + extension. |
| Intra-Site and Inter-Site Dialing (Multi-Site) | ISP + Site Code + Extension (for example, *2551234) | For a multi-site customer, it is recommended that extension dialing is not supported and all calls are dialed as ISP + Site Code + Extension. Note: ISP must not conflict with PSTN dialing and is therefore limited to * or #. |
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| PSTN Dialing |
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There are several alternatives for display. Some of the phones support E.164 dialing (including + sign Some customers prefer to display the number as it would be dialed. |
| DN Format |
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