Home > Articles > Certification > Cisco Certification > CCNP Voice / CCVP

  • Print
  • + Share This
This chapter is from the book

Transformation Masks

Dialing transformations allow the call-routing component to modify either the calling (initiator) or called (destination) digits of a call. Transformations that modify the calling number (automatic number identification [ANI]) are calling party transformations; transformations that modify the called party (dialed digits) are called party transformations. Dialed Number Identification System (DNIS) is a public standard implemented in the PSTN for modifying called party numbers.

Digit translation is possible in CUCM mainly through the Transformation Mask feature that can be found in various configuration options in CUCM (for example, route list details and translation pattern). CUCM overlays the calling or called party number with the transformation mask so that the last character of the mask aligns with the last digit of the calling or called party number. CUCM uses the original calling or called party digit of the source number anytime the mask contains an X. The X acts as a binary OR function. If the number is longer than the mask, the mask will add extra digits to the original calling or called party pattern.

Figure 11-9 illustrates an approach typically used to change the calling party (ANI) of internal directory numbers when he or she makes calls that are routed to the PSTN. The five-digit extension of 45000 in Figure 11-9 is transformed into a ten-digit pattern for the purposes of caller ID (ANI) on the PSTN. There is a distinction between ANI and caller ID that I would like to point out. Caller ID (CLID) refers to the presentation of the calling party name and number, whereas automatic number identification (ANI) refers only to the calling number. The mask of 8086236XXX has been applied to 45000 in Figure 11-9, resulting in 45 being replaced with 36, while the first five digits of 80862 are prefixed before the number so that users connected to the PSTN can return phone calls to the presented calling party number.

Figure 11-9

Figure 11-9 Transformation Mask Operation

Figure 11-10 illustrates the process in which a ten-digit number from the PSTN could be converted to a five-digit number using transformation masks. This process would be useful if the incoming called party from the PSTN gateway to CUCM was ten digits long, but incoming calls had to be converted to an abbreviated five-digit internal dial plan. Masks are always processed from right to left in CUCM. Transformation masks can be used to manipulate either the calling or called party number. A ten-digit pattern with a five-digit mask applied to it will result in a five-digit number. Figure 11-10 illustrates a ten-digit pattern with a five-digit pattern of 45XXX, which indicates that the last three digits will not change but the leading two digits will be set to 45, regardless of the incoming pattern.

Figure 11-10

Figure 11-10 Transformation Mask Operation

Transformation masks are configurable at various CUCM configuration levels including route patterns, translation patterns, and route lists (per route group).

The calling and called party transformation settings are assigned to route groups in the route list details of the route list that the route pattern is pointed to. Route pattern transformations apply only when a route pattern is pointed directly to a gateway. Route patterns are normally pointed to a route list. Multiple route patterns can point to the same route list, but multiple route patterns cannot point directly to the same gateway. Inserting gateways into route groups allows the gateways to be used for many different route patterns.

Most intersite calls in private companies are routed over WAN links as Voice over IP (VoIP) calls, but routed over PSTN links if the WAN is down or congested. Distributed Multi-Cluster Call Processing architectures require call routing to be configured for all intersite calls that cross cluster boundaries. Intercluster calls are routed over trunks in CUCM. H.225 trunks, SIP trunks, nongatekeeper-controlled intercluster trunks, and gatekeeper-controlled intercluster trunks are covered in more detail in Implementing Cisco Unified Communications Manager, Part 2 (CIPT2) Foundation Learning Guide.

The call routing between sites that belong to different CUCM clusters is normally configured to have a PSTN route group and an IP WAN route group. The IP WAN route group includes one or more intercluster trunks (ICT) or SIP trunks, while the PSTN route group contains one or more gateway endpoints (MGCP) or gateway devices (H.323/SIP) that connect the cluster to the PSTN. CUCM will forward the internal abbreviated dialing extension number if proper digit manipulation has not been configured. CUCM routes calls to a gateway in the PSTN route group. Proper digit manipulation requires that the calling pattern reflect a phone number that can be called back on the PSTN and that the dialed digits are properly routed.

  • + Share This
  • 🔖 Save To Your Account

InformIT Promotional Mailings & Special Offers

I would like to receive exclusive offers and hear about products from InformIT and its family of brands. I can unsubscribe at any time.

Overview


Pearson Education, Inc., 221 River Street, Hoboken, New Jersey 07030, (Pearson) presents this site to provide information about products and services that can be purchased through this site.

This privacy notice provides an overview of our commitment to privacy and describes how we collect, protect, use and share personal information collected through this site. Please note that other Pearson websites and online products and services have their own separate privacy policies.

Collection and Use of Information


To conduct business and deliver products and services, Pearson collects and uses personal information in several ways in connection with this site, including:

Questions and Inquiries

For inquiries and questions, we collect the inquiry or question, together with name, contact details (email address, phone number and mailing address) and any other additional information voluntarily submitted to us through a Contact Us form or an email. We use this information to address the inquiry and respond to the question.

Online Store

For orders and purchases placed through our online store on this site, we collect order details, name, institution name and address (if applicable), email address, phone number, shipping and billing addresses, credit/debit card information, shipping options and any instructions. We use this information to complete transactions, fulfill orders, communicate with individuals placing orders or visiting the online store, and for related purposes.

Surveys

Pearson may offer opportunities to provide feedback or participate in surveys, including surveys evaluating Pearson products, services or sites. Participation is voluntary. Pearson collects information requested in the survey questions and uses the information to evaluate, support, maintain and improve products, services or sites, develop new products and services, conduct educational research and for other purposes specified in the survey.

Contests and Drawings

Occasionally, we may sponsor a contest or drawing. Participation is optional. Pearson collects name, contact information and other information specified on the entry form for the contest or drawing to conduct the contest or drawing. Pearson may collect additional personal information from the winners of a contest or drawing in order to award the prize and for tax reporting purposes, as required by law.

Newsletters

If you have elected to receive email newsletters or promotional mailings and special offers but want to unsubscribe, simply email information@informit.com.

Service Announcements

On rare occasions it is necessary to send out a strictly service related announcement. For instance, if our service is temporarily suspended for maintenance we might send users an email. Generally, users may not opt-out of these communications, though they can deactivate their account information. However, these communications are not promotional in nature.

Customer Service

We communicate with users on a regular basis to provide requested services and in regard to issues relating to their account we reply via email or phone in accordance with the users' wishes when a user submits their information through our Contact Us form.

Other Collection and Use of Information


Application and System Logs

Pearson automatically collects log data to help ensure the delivery, availability and security of this site. Log data may include technical information about how a user or visitor connected to this site, such as browser type, type of computer/device, operating system, internet service provider and IP address. We use this information for support purposes and to monitor the health of the site, identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents and appropriately scale computing resources.

Web Analytics

Pearson may use third party web trend analytical services, including Google Analytics, to collect visitor information, such as IP addresses, browser types, referring pages, pages visited and time spent on a particular site. While these analytical services collect and report information on an anonymous basis, they may use cookies to gather web trend information. The information gathered may enable Pearson (but not the third party web trend services) to link information with application and system log data. Pearson uses this information for system administration and to identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents, appropriately scale computing resources and otherwise support and deliver this site and its services.

Cookies and Related Technologies

This site uses cookies and similar technologies to personalize content, measure traffic patterns, control security, track use and access of information on this site, and provide interest-based messages and advertising. Users can manage and block the use of cookies through their browser. Disabling or blocking certain cookies may limit the functionality of this site.

Do Not Track

This site currently does not respond to Do Not Track signals.

Security


Pearson uses appropriate physical, administrative and technical security measures to protect personal information from unauthorized access, use and disclosure.

Children


This site is not directed to children under the age of 13.

Marketing


Pearson may send or direct marketing communications to users, provided that

  • Pearson will not use personal information collected or processed as a K-12 school service provider for the purpose of directed or targeted advertising.
  • Such marketing is consistent with applicable law and Pearson's legal obligations.
  • Pearson will not knowingly direct or send marketing communications to an individual who has expressed a preference not to receive marketing.
  • Where required by applicable law, express or implied consent to marketing exists and has not been withdrawn.

Pearson may provide personal information to a third party service provider on a restricted basis to provide marketing solely on behalf of Pearson or an affiliate or customer for whom Pearson is a service provider. Marketing preferences may be changed at any time.

Correcting/Updating Personal Information


If a user's personally identifiable information changes (such as your postal address or email address), we provide a way to correct or update that user's personal data provided to us. This can be done on the Account page. If a user no longer desires our service and desires to delete his or her account, please contact us at customer-service@informit.com and we will process the deletion of a user's account.

Choice/Opt-out


Users can always make an informed choice as to whether they should proceed with certain services offered by InformIT. If you choose to remove yourself from our mailing list(s) simply visit the following page and uncheck any communication you no longer want to receive: www.informit.com/u.aspx.

Sale of Personal Information


Pearson does not rent or sell personal information in exchange for any payment of money.

While Pearson does not sell personal information, as defined in Nevada law, Nevada residents may email a request for no sale of their personal information to NevadaDesignatedRequest@pearson.com.

Supplemental Privacy Statement for California Residents


California residents should read our Supplemental privacy statement for California residents in conjunction with this Privacy Notice. The Supplemental privacy statement for California residents explains Pearson's commitment to comply with California law and applies to personal information of California residents collected in connection with this site and the Services.

Sharing and Disclosure


Pearson may disclose personal information, as follows:

  • As required by law.
  • With the consent of the individual (or their parent, if the individual is a minor)
  • In response to a subpoena, court order or legal process, to the extent permitted or required by law
  • To protect the security and safety of individuals, data, assets and systems, consistent with applicable law
  • In connection the sale, joint venture or other transfer of some or all of its company or assets, subject to the provisions of this Privacy Notice
  • To investigate or address actual or suspected fraud or other illegal activities
  • To exercise its legal rights, including enforcement of the Terms of Use for this site or another contract
  • To affiliated Pearson companies and other companies and organizations who perform work for Pearson and are obligated to protect the privacy of personal information consistent with this Privacy Notice
  • To a school, organization, company or government agency, where Pearson collects or processes the personal information in a school setting or on behalf of such organization, company or government agency.

Links


This web site contains links to other sites. Please be aware that we are not responsible for the privacy practices of such other sites. We encourage our users to be aware when they leave our site and to read the privacy statements of each and every web site that collects Personal Information. This privacy statement applies solely to information collected by this web site.

Requests and Contact


Please contact us about this Privacy Notice or if you have any requests or questions relating to the privacy of your personal information.

Changes to this Privacy Notice


We may revise this Privacy Notice through an updated posting. We will identify the effective date of the revision in the posting. Often, updates are made to provide greater clarity or to comply with changes in regulatory requirements. If the updates involve material changes to the collection, protection, use or disclosure of Personal Information, Pearson will provide notice of the change through a conspicuous notice on this site or other appropriate way. Continued use of the site after the effective date of a posted revision evidences acceptance. Please contact us if you have questions or concerns about the Privacy Notice or any objection to any revisions.

Last Update: November 17, 2020