Here is the bulletin:
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Product Bulletin
Bulletin Number: P-2004-0181-Global
Date: 05 May 2004
Support for Pause on ISDN Interfaces
Introduction
Nortel Networks wishes to clarify for its Nortel Networks Meridian 1* users that a delay (pause) in
the outpulsing during call setup by dialing asterisk (*) cannot be accomplished for ISDN interfaces.
This feature was intended and designed to be used only on analog and DTI interfaces and not ISDN
interface. Also on public ISDN interface, the North American ISDN standards do not allow
introduction of delay while outpulsing the called party number.
Main Topic
Nortel had introduced a feature in Meridian X08 software in 1982 which allows the user to include
delays in the outpulsing by dialing the asterisk (*) in the original digit string .Each asterisk (*) signifies
a default three-second delay in outpulsing. This feature was basically developed since PBX nodes
were occasionally required to pause at various points in the digit string to allow the remote node for
trunk access and register attachment for signaling in Analog/DTI network. This feature will only
work with analog/DTI interfaces and not ISDN. The reason for this is that Analog/DTI interfaces
use tone based signaling where each digit in the called party number is signaled separately and hence
it is possible to introduce delay between them.
Additionally, in North America, ISDN call is setup in Enbloc mode only i.e the ISDN standards used
to connect to public network mandates sending all the called party digits in a single message. Since
there is no provision to introduce delay and split the called party number, this feature cannot be used
on ISDN interface.
References and Related Documents
NTP 553-3001-180 Release 1.0 Electronic Switched Network.
Ordering Guidelines and Procedures
• Not applicable
* Nortel Networks, the Nortel Networks logo, the Globemark and Meridian 1 are trademarks of
Nortel Networks.
Nortel Networks is an industry leader and innovator focused on transforming how the world
communicates and exchanges information. The Company is supplying its service provider and
enterprise customers with communications technology and infrastructure to enable value-added IP
data, voice and multimedia services spanning Wireless Networks, Wireline Networks, Enterprise
Networks, and Optical Networks. As a global Company, Nortel Networks does business in more
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than 150 countries. More information about Nortel Networks can be found on the Web at
