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Please
click on a question below to view a detailed answer.
What is CPS?
Why do I need CPS when I can already choose to route my
call via a routing box on the wall?
How does CPS differ from existing methods?
Are there any call types that CPS doesn't apply to?
If the switch uses the originator's CLI to identify the
incoming call, does this mean that I can no longer withold my number when
making outbound calls?
What are the benifits of introducing CPS?
If I use CPS, will I be able to use BT Select Services?
What
is CPS?
A:
Carrier pre-selection (CPS) is a mechanism that allows you to select an
alternative operator to route your voice calls, other than BT, in advance
without dialling additional codes on the telephone or programming your
on-site equipment to do this.
Why
do I need CPS when I can already choose to route my calls via a routing
box on the wall ?
A:
At present, although you can use an alternative carrier to BT, it involves
the dialling of a 3 or 4 digit access code before each phone call. This
is called indirect access and either involves the manual dialling of the
code, the programming of your on-site PBX or the provisioning of routing
equipment by your chosen carrier.
With the introduction of CPS as a way of increasing competitiveness in
the European telecommunications market, by making indirect access simpler
and more reliable. Oftel, the UK regulator, is overseeing and enforcing
the introduction of CPS in the UK.
How
does CPS differ from existing methods?
A: previously, when you ordered indirect services from Global Telecom
or another supplier you will have smart equipment fitted to your BT Network
Termination Equipment (NTE) on-site by an engineer. CPS is a better alternative
to current indirect access methods, because it routes calls at your local
switch (BT does the work on behalf of Global Telecom). The switch is programmed
to acknowledge that relevant calls from your CLI should be routed over
the chosen carriers network when they arrive at the local exchange. The
re-routing of calls from the BT network to our network is seamless, there
is no downtime and you do not need an engineers visit. On-site visits
are only necessary when de-programming of least-cost routing on Customer
Premise Equipment (CPE) is required.
Are
there any call types that CPS doesn't apply to?
A: Yes, CPS will not apply to calls using Type A short codes (e.g. 100,
999, 112, 192) or Type C (operator specific) short codes or the 0844 04yyxxx
and 0808 99yyxxx number ranges used for unmetered interconnect Internet
access. Therefore, at the moment CPS will not automatically route directory
enquiry calls.
If the switch uses the originator's CLI to identify
the incoming call, does this mean that I can no longer withhold my number
when making outbound calls?
A: No. You can continue to use the 141 service to withhold your number.
This is because 141 is always implemented at the destination local exchange.
Your CLI always travels with the call as far as the destination local
exchange, before being removed to cross the local loop to the end receiver.
What
are the benefits of introducing CPS?
Improved Service Levels - CPS is a more robust method of providing indirect
services, than smart equipment and LCR. The result is improved delivery
of CPS.
Reduced Call Costs - CPS guarantees 100% call routing of the appropriate
calls providing all CLI lines have been accurately recorded. You will
benefit from competitive call charges and know that all calls will be
automatically routed rather then having some call still routed via BT
and charges at their rates.
Convenience - No longer will you have to suffer downtime during installation,
engineer visits or be concerned about incompatibility problems between
CPE equipment and smart equipment.
If I use CPS, will I be able to use BT Select Services?
A: CPS will affect different BT Select Services in different ways:
Call Diversion - BT's Call Diversion, Call Minder and Enhanced Call Return
are supported
Call Barring - Call barring will be available with CPS. Cable & Wireless
can offer call barring on particular numbers chosen by you on our network.
You can contact BT directly to have certain numbers barred on the BT network.
This will not affect calls routed over the Cable & Wireless network.
141/1471 - CPS will not affect the 141/1471 service.
1571 - CPS will enhance this service as when you dial '3' to return a
call, this call is routed via your chosen carrier.
Three Way Call - This will continue to be available with all outbound
calls routed via your chosen carrier.
Call Forwarding - Call forwarding is available with the additional benefit
that the forwarded element of the call is also routed via your chosen
operator.
Complete
the Enquiry form
or call our freephone number now. |
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