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911 is a single number to call for medical, fire, and police emergencies in the United States
and Canada. Calls to 911 are routed to a public safety answering point (PSAP). The PSAP
is the first-tier triage call center for emergency calls. PSAP operators dispatch medical, fire,
and police resources as necessary.
Emergency calls have to be sent to a local PSAP through the local gateway. In a multisite
deployment, all emergency calls are placed to the same number, but they need to be routed
differently depending on the calling phone’s physical location.
Vanity numbers provide access to a certain local service within an enterprise. Users should
be able to dial the same number to access the appropriate locally provided service no matter
where they are located. Some companies, for example, use the DTMF keypad word HELP
(4357) to dial the IT help desk.
An example of vanity services is a number that connects users to local IT support. Vanity
numbers are not limited to internal services; they could also be configured to reach external
local services (taxi, travel agencies, and so forth) by using abbreviated dialing within the
corporate dial plan.
A vanity number can be configured as a DN, a route pattern, a hunt pilot, or a translation
pattern.
NOTE Emergency calling in the United States and Canada includes many additional
aspects that are not covered in this book.
332 Chapter 13: Calling Privileges
Implementing vanity numbers is similar to configuring selective PSTN outbreak (always
using the local gateway for PSTN or emergency calls) and consists of the following steps:
Step 1 Create a site-specific partition per site.
Step 2 For each service, configure the same vanity number (route pattern, DN,
hunt pilot, or translation pattern) once per site and put it into the sitespecific
partition created earlier.
Step 3 Put the appropriate site-specific partition into the CSS of the phones
located at a site.
Figure 13-26 shows a vanity number for IT support that is configured as 7999. Both the
New York and San Jose sites will use this same IT support vanity number. The DN of 7999
located in San Jose is put into the San Jose partition. The same DN is configured in the New
York partition. Phones located in New York have partition New York listed first in their
CSS; phones located in San Jose have partition San Jose listed first in their CSS.
If a San Jose user dials 7999, the call is routed to the IT help desk in San Jose because the
New York DN of 7999 is not accessible by the San Jose phone. The San Jose CSS does not
include the New York partition. The same call-routing theory applies to users in New York.
Calls placed to 7999 in New York are routed to the local New York IT help desk.
Figure 13-26 Vanity Number Example
If the desired services are provided externally, a translation pattern is configured to translate
the appropriate vanity number. Instead of memorizing a long number for the travel agency
(which may change over time), users can be given a phone number that aligns to the
corporate dial plan. The translation pattern will match on the dialed digits of 7998 and
NOTE If abbreviated dialing is used to reach external local services (such as a local
travel agency by dialing 7998), a translation pattern is used for the vanity number.
IP IP
San Jose Phone IT Help Desk
San Jose
CSS:
San Jose
Standard
DN: 7999
Partition:
San Jose
IP IP
New York Phone IT Help Desk
New York
CSS:
New York
Standard
DN: 7999
Partition:
New York
Private Line Automatic Ringdown 333
manipulate the digits to 1 914 555-1212 by using a called-party transformation mask. Over
time, if there are changes to the external number, users will not need to know the new phone
number. The CUCM administrator can reconfigure the called-party transformation mask.
By creating the vanity number once per site and putting it into a site-specific partition, you
can ensure that users always match the vanity number translation pattern for their respective
site. This is achieved by including the site-specific partition in the phone CSS.
Figure 13-26 would use two translation patterns to achieve this objective. Each translation
pattern would be placed in a site-specific partition. Configure the San Jose translation
pattern with the PSTN number of the San Jose travel agency; configure the New York
translation pattern with the PSTN number of the New York travel agency. Make sure that
the translation patterns have CSSs assigned that allow them to use the local PSTN gateway
for routing the calls out to the translated PSTN numbers.
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