![]() Translation Pattern = 408 555-1XXX Called-Party Transform Mask=4XXX PSTN DID Range Does Not Match Internal Range After CUCM applies the transformation mask, it performs a new call-routing lookup for the translated four-digit number, finds the DN in its call-routing table, and routes the call to the corresponding IP phone. The called-party transformation mask of 4XXX is applied against the translation pattern of 408 555-1XXX, resulting in a 4XXX dialed number. When the company receives an incoming call, the company uses a translation pattern that matches the assigned PSTN DID range (408 555-1XXX). When the direct inward dialing (DID) range from the central office (CO) does not match the internal DN range, a translation pattern can be used to map the PSTN number to the internal DNs.įigure 12-13 shows a scenario in which a company has a PSTN DID range of 408 555-1XXX, whereas the internal four-digit extensions begin with 4XXX. An overlapping dial plan involving a translation pattern could result in call- routing issues.įigure 12-12 Translation Pattern Configuration Translation patterns are processed as urgent priority by default, and the Urgent Priority check box cannot be removed from a translation pattern. If the translation pattern contains an sign, a numbering plan and route filter can be selected to match certain number patterns of the selected numbering plan. The transformation settings are not applicable if the Block This Pattern radio button is selected. If the Block This Pattern radio button is selected, a cause code must be selected. The translation pattern identifies the dialed digit string to match and the calling- or called-party transformation settings that should be applied. To configure a translation pattern, navigate to Call Routing > Translation Pattern, as shown in Figure 12-12. Translation patterns exist only to manipulate digits.įigure 12-11 Translation Patterns Route Pattern The primary difference between route patterns and translation patterns is that translation patterns do not have a final call-routing destination ( route list, gateway, or trunk). A translation pattern matches the dialed digits in a similar manner to the matching of a route pattern. To prevent call-routing loops, CUCM passes digits through translation patterns for only ten iterations.įigure 12-11 illustrates the operation of a translation pattern. Eventually, the call is routed or blocked. The new pattern may match another translation pattern where digit transformation can occur once again. The resulting pattern is then re-analyzed by the system. Translation patterns use route-pattern style matching and transformation-mask digit manipulations. ■ Extension mapping from a public to private network ■ Hotlines with a need for private line automatic ringdown (PLAR) functionality (security phones in elevators or on a college campus) ![]() ■ Security desks and operator desks (abbreviated dialing) Additional examples where translation patterns can be used are as follows: In these situations, a uniform dialing plan can be created and translation patterns applied to accommodate the unique office codes at each location. ![]() The translation pattern can prefix a 9 and a 1 to all incoming PSTN calls.ĭigit manipulation and translation patterns are used frequently in cross-geographical distributed systems where, for instance, the office codes are not the same at all locations. The caller ID from the PSTN may include only 10 digits while the system requires 11 digits prefixed with an access code of 9 to properly route outgoing calls. Translation patterns are useful to manipulate the caller ID of incoming PSTN calls to allow the users to quickly return phone calls using the redial and missed-calls functionality. The translation pattern can also be used to block certain patterns. CUCM uses translation patterns to manipulate digits before routing a call. ![]()
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