SIP TRUNKING
Twickenham Stadium April 1st & 2nd, 2009
www.comms-dealer.com
SIP: It could
be for you...
The market for SIP Trunking solutions has
developed significantly with improved broadband
and QoS mechanisms in place. Here, we examine
the business case for SIP and the end user benefits.
S
IP trunks provide a aware networks, it is possible to companies had ISDN and PSTN as
flexible and scalable provide connectivity that the back up. This is happening now
solution for inbound and reseller can have confidence in.” as we have a lot of customers
outbound voice access with SIP using ISDN as back up. As
to a company’s PBX, and they There are many advantages market confidence grows there
are set to catalyse the ISDN of using SIP trunks. From a will be a greater swing to SIP only.
replacement market, believes manufacturer perspective they
Adrian Sunderland, CTO at Griffin don’t need to supply hardware “SIP trunking is the future, of
Internet. “SIP trunking services have to terminate ISDN 2 and 30 or that there is no doubt. All the
always been held back by the analogue trunks in different telephony manufacturers can’t
quality of broadband connectivity countries around the world, be wrong. SIP trunks are easy to
available. However, as the quality or gain approval from public sell because there are so many
of broadband is getting better with telephone operators. “With SIP features and benefits, but the
ever increasing upstream speeds, it you simply need an Internet market is changing and the
is hard to envisage a future where connection. This will reduce the channel needs to adapt and
SIP trunks haven’t replaced most of
David Rushton
supply cost of new telephony gain a better understanding
the ISDN30 lines out there,” he said. systems,” said Paul Taylor, Sales and of data connectivity.”
SIP is still an
Marketing Director at VoiceFlex.
Any business will benefit from SIP
trunking, points out Sunderland,
alternative to
Key features and
“Any business will benefit from SIP
but those requiring the flexibility
benefits of SIP...
to increase or reduce capacity,
ISDN rather than a
trunks. If they are moving from
London to Manchester they can
• Free calls between SIP sites
or needing to move premises
total replacement
port the number to a SIP provider.
• Lower cost than ISDN, plus DDI
while retaining the same number If they are based in Manchester
ranges and CLI presentation
ranges will particularly benefit. “The complete confidence in IP and require a London number this
are included in the price.
SIP trunking providers are most Telephony services before selling can be provided on SIP trunks.
• Lower calls cost.
successful when the customer is them. “SIP trunking, and indeed International numbers can also
replacing their PBX,” he added. many other VoIP services, have be provisioned. Any CLI owned
• Porting allows users to bring
“This is because every modern PBX been held back by the lack of SLAs by the company can be sent
existing numbers with them
wherever the new location.
supports SIP either as standard or as on the broadband connectivity,” over SIP trunks, which also offer
a low cost option. For a business that said Sunderland. “The vast majority auto failover of telephone calls to
• Scalable on a per channel
is starting up or one that is moving of small to medium sized businesses another IP connection, ISDN, PSTN
basis, no penalties for scaling
up or down as required.
premises, hosted and managed are connected to the Internet via or mobile number,” he added.
VoIP may be the most appropriate a DSL-based service and so want
• Compliments a converged
solution. It is horses for courses, to use this same connection for As the cost of data connections
network with lower costs
and simplified architecture.
and both SIP trunking and hosted SIP. Business ISPs like Griffin have continues to fall SIP trunks will pick
VoIP are gaining more traction.” devoted a great deal of R&D and up, believes Taylor. He said: “SIP
• Enables the ‘IP’ in the ‘IP-PBX’
allowing businesses to benefit
money to solving the broadband will replace ISDN in due course
from simplified numbering
A possible sticking point for SIP quality problem. With sensible but it will take a number of years.
plans and talk one another.
trunking is that resellers want SLAs, resilient solutions and QoS When ISDN first came to market
UK Telco 100 club is the fastest Partners receive a 220% t: 0844 77 00 765
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38 COMMS DEALER FEBRUARY 2009 www.comms-dealer.com
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