Avaya 3100 Mobile Communicator users should use the E.164 Fully Qualified International
Numbers for all stored Public Switched Telephone Network (PSTN) numbers in address books
and mobile device applications. By using this format, the numbers can be dialed from any
region or country, within the wireless network or from the communication server.
The E.164 Fully Qualified International Numbers ensure that users do not need to be
concerned about dial prefixes or long distance codes. The network determines how to place
the call, based on the user's location and network connection.
When the user dials an E.164 Fully Qualified International Number, the communication server
puts the number in the request Uniform Resource Indicator (URI) of the SIP INVITE message in
the following format sip: +CCCXXXXXXXX@domain; user=phone.
When using the ECS, configure the CNTC, NATC, and INTC parameters in LD 15 to support
E.164 Fully Qualified International Numbers. These parameters ensure that fully qualified
numbers within the same country are dialed as national numbers, and international numbers
are prefixed correctly.
Example 1 (Switzerland)
ECS is Avaya Communication Server 1000 (Avaya CS 1000) AC1=0, CNTC=41, NATC=0,
INTC=00
Call to a number within Switzerland
A user initiates a call to a contact with the phone number +41123456789.
The URI incoming for the SIP INVITE for the call is sip:
Avaya CS 1000 digit processing strips the CNTC and adds <AC1 + NATC> to produce
00123456789
Call to a number outside Switzerland
A user initiates a call to a contact with the phone number +14161234567.
The URI incoming for the SIP INVITE for the call is sip:
Avaya CS 1000 digit processing adds <AC1 + INTC> to produce 00014161234567
Example 2 (North America)
ECS is Avaya CS 1000 AC1=6, CNTC=1, NATC=1, INTC=011
Call to a number within North America
A user initiates a call to a contact with the phone number +14161234567.
The URI incoming for the SIP INVITE for the call is sip:
Dialing plans and telephone numbers
Deployment Guide October 2010 17
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