Multi-Site Customer with ISP
----------------------------

In some cases, customers may require an independent Inter-Site Prefix that
is not included as the first digit of a Site Code. For example, for
customers who wish to define ISPs per country.

Multi-Site Customer with ISP

+------------+-------------------+-----------------+---------------------+
|            | Dialing Format    | Display Format  | Notes               |
|            | (A-Party)         | (B-Party)       |                     |
+============+===================+=================+=====================+
| Intra-Site | * Extension       | * Extension     | Intra-Site Calls    |
| Dialing    |   (for example,   | * ISP + Site    | can be dialed as an |
|            |   4321 or 54321)  |   Code +        | extension or as an  |
|            |                   |   Extension     | ISP+ Site Code +    |
|            | * ISP + Site      |                 | Extension.          |
|            |   Code +          |                 | Similarly, the      |
|            |   Extension       |                 | calling party       |
|            |   (for example,   |                 | number can be       |
|            |   82554321)       |                 | displayed either as |
|            |                   |                 | an extension or as  |
|            |                   |                 | ISP + Code +        |
|            |                   |                 | Extension           |
+------------+-------------------+-----------------+---------------------+
| Inter-Site | ISP + Site Code + | ISP + Site Code | Inter-Site - calls  |
| Dialing    | Extension (for    | + Extension     | are dialed as ISP + |
|            | example,          |                 | Site Code +         |
|            | 81131234)         |                 | Extension           |
+------------+-------------------+-----------------+---------------------+
| DN Format  | Site Code +       | Site Code +     | The DN can be       |
|            | Extension (for    | Extension       | constructed with or |
|            | example,          |                 | without ISP         |
|            | 81134321OR ISP +  |                 |                     |
|            | Site Code +       |                 |                     |
|            | Extension (for    |                 |                     |
|            | example,          |                 |                     |
|            | 82554321)         |                 |                     |
+------------+-------------------+-----------------+---------------------+