Telephone Lines

We can install new telephone lines for business customers and provide competitive installation and rental costs combined with low cost calls.  This means that we can provide a complete service to our business customers who want to take advantage of our advanced range of business phone systems, combined with telephone lines, maintenance and support contracts and a wide variety of additional telephony equipment and services that the modern business requires to remain competitive.

Analogue Telephone Lines

PSTN Lines are what most business users call standard telephone lines.  A telephone line can be supplied with a single number, but in most cases business users require multiple lines supplied on a single number.  This would enable multiple callers to call the phone number and contact the company at the same time.  This is called Auxillary Working.  If you required up to 4 inbound calls at any one time, you would need four telephone lines, which would mean paying four monthly or quarterly line rentals.  If all four telephone lines were auxillary working to a single number then up to 4 people could use these phones lines.  If all four lines were in use and a fifth caller telephoned the number they would get an engaged tone.

Analogue telephone lines need to be connected to an analogue trunk port of a telephone system, and if you have four telephone lines, you will need four spare analogue trunk ports to connect these phone line to.  So in the case of the Panasonic analogue phone systems you would need the Panasonic KX-TES824 CCU with the optional 3+8 expansion card.  This would give you a capacity of 6 lines and 16 extensions.  Once the four telephone lines were connected there would be a spare capacity of two lines, so two additional lines could be purchased to provide six lines, therefore six simultaneous calls.

If your business requires more than six or eight telephone lines, you should consider using ISDN or Voice Over IP Telephone Lines becasuse many entry level analogue phone systems so not expand pass eight analogue / PSTN telephone lines.  Analogue Phone lines can be connected to all panasonic Phone Systems providing that the analogue trunk card is purchased.  Many bsuiness customers using analogue phone lines will use the KX-TEA308 or KX-TES824 analogue phone systems.  If a bsuiness wants to start with analogue lines and upgrade to ISDN or VoIP Telephone lines then they should consider the KX-TDA15 or KX-TDA30 Digital Hypbrid Systems and start with the analogue trunk card, which can be swapped out later when the upgrade is required.

ISDN Telephone Lines

ISDN stands for Integrated Services Digital Network, and this simply means that the calls are delivered using a digital signal.  The main advantage of ISDN phone lines are the availability of additional services, the main one being Direct Dial In (DDI) numbers.  This enables multiple numbers to be allocated to a few ISDN phone lines which can be interpreted by the phone system so that calls to individual telephone numbers can be routed to specific extensions or groups of extensions (Ring Groups).

There are two types of ISDN phone line in the UK, ISDN2e and ISDN30e.

ISDN2e

This type of ISDN is supplied as a single line which has the capacity to carry two telephone calls.  The service is usually delivered to the customers site as a single termination point (RJ45), and needs to be connected to the ISDN2 Trunk Port of a telephone system to be able to work.  A single ISDN2e phone line provides two channels, so that means two simultaneous calls can be made at any one time.  Multiple ISDN2e lines can be used together to increase the capacity of simultaneous calls, but each ISDN2e phone line will need to be connected to it''s own ISDN2e Trunk port on the telephohne system.

DDI numbers can be allocated to ISDN2e phone lines, so for expample you could have two ISDN2e phone lines (4 channels) and a blcok of 10 or 20 DDI telephone numbers.  This would mean that a small business with 15 extensions would be able to give each extension it's own telephone number, so when a call is made to that phone number, the phone system sees the number being called and can route the call to a particular extension.  Of course, with only 2 Lines (4 channels) only 4 calls inbound or outbound could be made at any one time, no matter how many individual DDI numbers were allocated to the lines.

ISDN2e telephone lines tend to be used for smaller phone systems were only three or four ISDN2e lines are required (6-8 channels), so the KX-TDA15 or KX-TDA30 phone systems should provide adequate capacity for both lines and extensions for small to medium businesses that want to take advantage of ISDN services. If a business requires more than eight simultaneous calls they should consider ISDN30e phone lines.

ISDN30e

his type of ISDN is supplied as a single line which has the capacity to carry up to 30 simultaneous calls.  ISDN30e lines work in a similar way to ISDN2e lines, a rental is chargeable on each channel required with a minimum of 8 channels.  That means if you require an ISDN30e phone line your would need to order a minimum of 8 channels and pay a monthly or quarterly rental for 8 channels, which would allow 8 simultaneous calls.  If extra call capacity is required then it is simply a case of opening up extra capacity and paying the extra rental for each additional channel, up to a maximum of 30 channels.  An ISDN30e line will need to connect to an ISDN30e Trunk Port of a phone system, so you would need to use this with the KX-TDA100, KX-TDA200, KX-TDA600, KX-TDE100 or the KX-TDE200 phone systems, all of which have the ISDN30e trunk card. 

ISDN30e lines can also use DDI numbers so each extension in the business could have it's own inbound direct dial telephone number.  If a business is using DDI numbers then we recommned they use Voicemail so that calls made directly to an extension can be answered by the voicemail if the person being called is engaged or does not answer their telephone.

SIP Trunks

Voice Over IP telephone lines are an alternative to analogue or ISDN telephone lines.  They enable a phone system user to make calls over a broadband type connection.  VoIP calls are ideal for bsuinesses that want to embrace new technologies and provide connectivity for branch offices and homeworkers, as well as being able to make and recieve calls over their broadband connection using a SIP Trunk telephone service provider.  A VoIP Telephohne service will require the phone system to have a suitable VoIP interface, in the case of the KX-TDE range of phone systems an additional SIP trunk card can be purchased and the KX-TDE systems have built in VoIP capability.

Some businesses will use VoIP telephone lines to encrease capacity on their phone systems, when they have reached the limit of their traditional analogue or ISDN trunk capacity.  A VoIP Telephone Line / SIP Trunk works in a similar way to an analogue or ISDN telephone line becuase it needs an available port on the phone system and a rental is usually payable for each line required.  That means if a business requires four simultaneous calls over VoIP, they will require a 4 port VoIP / SIP Trunk interface and will usually be required to pay the monthly line rental / service charge for four SIP Trunks.