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EXHIBIT 99.4 NEWS RELEASE Attention business editors and telecommunication reporters: Call-Net/Sprint Canada supports the entry of new competitors to the local service
market, within the current regulatory regime Company agrees with the CRTC that regulation should be technology-neutral
and cautions that theproceedings not be used to allow the
re-monopolization of local phone service OTTAWA, ON, September 21, 2004 Call-Net Enterprises Inc., a national
facilities-based provider of competitive telecommunications, data and
Internet Protocol (IP) solutions to households and businesses across
Canada, today called upon the Canadian Radio-television and
Telecommunications Commission (CRTC) to continue to apply the current
regulation governing providers of local phone service regardless of the
technology utilized to provide the service. VoIP is simply a voice service being provided over a broadband facility,
said Bill Linton, president and chief executive officer of Call-Net. We
support the entry of new competitors in the local service market using
VoIP, providing they comply with the existing rules of competition such as
the requirement to provide consumer protection, equal access and enhanced
services such as 911 and 411. Linton also stated, In addition, incumbent telcos should be subject to the
existing regulations regardless of the technology they use to provide voice
service, particularly as long as they control the vast majority of the
market. Until we actually see competition in the local market, the former
monopoly phone companies should continue to be regulated as they are today
for the benefit of consumers. Almost six years after competition was first introduced in the local phone
service market, the former monopolies continue to control more than 95 per
cent of the market share. The majority of consumers do not have real
choice in most markets when it comes to local phone service. Regulation
exists to ensure that consumers with no other alternatives are protected
from price gouging and to create the environment to establish a fair and
competitive market place for local service. Added Linton, Unfortunately the incumbents are trying to turn the issue
into one of technology. But there is no hiding the fact that they are
still dominant and consumers dont have a choice of local service providers
in most markets. Failure to apply the existing regulatory regime to
incumbent telephone companies that provide voice over IP could stifle the
future development of local competition in Canada. Call-Net is also urging the CRTC to ensure that competitors have access to
the networks of cable companies as well as monitoring their behaviour in
markets where they control substantial market share. Call-Net recently launched voice-over-Internet protocol telephony service
for the consumer market. The VoIP service called Sprint Canada Internet
Phone Service, works with any residential high speed Internet service,
including light services offered by telephone digital subscriber line (DSL)
or cable. The starter package includes a VoIP gateway and an integrated
four-port 100 megabits per second (mbps) Ethernet router and firewall.




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The service works with a regular telephone handset that includes one
telephone number with a wide variety of features and services that can be
used wherever there is access to high speed Internet service. Customers
can keep their existing phone number in serviceable areas or add a new one
and select their preferred area code and exchange. The service is
available as a standalone product and includes all standard home phone
service features such as operator services, 911, 411, and 711, call
waiting, call display and voice mail. It is also available as part of
bundled package with local home phone service and Fido® wireless service. About Call-Net Enterprises Inc.
Call-Net Enterprises Inc., (TSX: FON, FON.B) primarily through its wholly
owned subsidiary Sprint Canada Inc., is a leading Canadian integrated
communications solutions provider of home phone, wireless, long distance
and IP services to households, and local, long distance, toll free,
enhanced voice, data and IP services to businesses across Canada. Call-Net,
headquartered in Toronto, owns and operates an extensive national fibre
network, has over 148 co-locations in five major urban areas including 31
municipalities and maintains network facilities in the United States and
the United Kingdom. For more information, visit www.callnet.ca and
www.sprint.ca. For further information: Media Contact:
Karen OLeary
Corporate Communications
416-718-6445
karen.oleary@sprint-canada.com