Zusi’s SIP trunks provide a highly flexible alternative to
ISDN and are compatible with all the leading IP PBX
brands in the UK market, giving you peace of mind that
your PBX hardware works with the network service.
Compared to ISDN, Zusi’s SIP trunks are cheaper on a per
channel basis and are more flexible in terms of what
telephone numbers you can have and the locations in
which you can have them. In addition, they are quicker to
install and offer a robust business continuity service that
ensures your business never loses any calls. Our service
can support connections ranging from two channels for
businesses with small PBXs, with no limit on the number
of channels that can be supported for large enterprises
and contact centres.
How Does it
Zusi’s SIP trunk connect your PBX to our network,
enabling full PSTN breakout on the public telephone
network. Connection from your site (or sites) to our
network is via an IP connection (for example fibre
broadband or Ethernet) and is delivered as an end to
end service with an availability guarantee, voice
channel guarantees and voice quality of service.
Using Zusi SIP Trunks, your PBX can be located at either your
premises, such as shown in the
diagram above, or could be housed within a managed co
location centre provided by Zusi where you don’t need to be
concerned about space, power or support engineers to look
after your PBX. Either scenario is possible and for added
resilience and flexibility you may wish to use a combination of
both support models. Zusi give your business the flexibility you
need to make the move from ISDN to SIP as easy as possible
for the way your business operates.
Who is SIP
Zusi SIP Trunks are suitable for any size
of business from small businesses to large
enterprises and government organisations that
currently have a PBX, unified communications
solution or key system.
Benefits of SIP
It’s easy to get lost in the jargon of technology with people espousing
acronyms about features that may or may not make sense to you. So let’s try to narrow down the
features of SIP and how it can benefit your business.
1. SIP trunking supports business continuity
SIP trunking offers a flexibility that is not available
through traditional ISDN. A number of possibilities
can affect how resilient your voice and data
connections are. Unforeseen circumstances such
as damage to lines, moving offices or being unable
to redirect calls, can be damaging to your business.
SIP trunking minimises these problems and ensures
you can keep working through every eventuality.
2. Number flexibility
SIP trunking supports your business by allowing you
to decide which number you want to display on a call
by call basis. Even if you’re making a significant
move in location, or just wanting to grow your
business without opening more offices, SIP trunking allows out
of area geographic number ranges to be used
showing your business as local, despite being
physically located elsewhere.
3. SIP trunking saves you money
Why have a separate voice and data connection
when you can have both on one line? By discarding
any unnecessary ISDN lines, you will be able to
save a large amount of money. In addition, SIP
trunking can typically save you a further 50% on line
rentals and 25% on calls. By utilising the benefits
of SIP trunking number flexibility when you’re
moving office, you will not need to spend money on
changing stationery, advertisements or listings. SIP
trunking also allows you to make free calls between connected sites, even internationally.
4. SIP trunking offers greater flexibility
If you’re still using ISDN, the chances are that you
are spending money on lines that you may not
actually need all year round. SIP trunking gives you complete control of your lines
you can add more when demand is high, reduce them when there is
little demand and split calls to make handling more
efficient. Being able to make these instant changes
puts you in total control of your communications.
5. SIP trunking comes with a contingency plan
Often, things will happen that you just can’t control.
Whether that’s a problem in the office, busier peak
times than usual or a lack of connection, Zusi’s
SIP trunking business continuity feature is designed
to handle emergencies with ease. It is able to
automatically reroute any calls to back up sites in a number of seconds so there is no disruption for your customers.