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IP Office Product Description

IP Office 4.2

Page 165

Issue 18.b.- (08 July 2008)

Point-to-Point Protocol (PPP)

PPP is an industry standard Wide Area Networking Protocol, that allows inter-working with a wide range of 3rd

party routers. PPP is used over dial-up or leased line circuits where a single channel is used to connect the two

locations together. e.g. A single channel maybe a 64K channel on a dial-up circuit or a 256K leased line etc.

Multi-Link Point-to-Point Protocol (ML-PPP)

IP Office supports Multi-Link PPP allowing additional calls to be made where bandwidth greater than a single

channel is required. The maximum number of channels available to data can be set on a service-by-service

basis. When the available bandwidth reaches a user defined limit additional channels can be automatically

added. Similarly, when traffic falls then the number of channels in use can be automatically reduced. If there is

no data traffic on any of the channels in use then all lines can be cleared. Since most carriers have a minimum

charge for calls, the period that a channel has to be idle before clearing is configurable. Through these

mechanisms call costs can be effectively controlled while ensuring that bandwidth is available as and when it is

needed.

Frame Relay

Frame relay is a wide area networking protocol based on the X.25 protocol. Individual network connections are

multiplexed over a common medium by the use of Permanent Virtual Circuits (PVC). This allows a single

Leased Line to provide connectivity to a number of different locations. Frame relay is currently implemented in

IP Office as a CPE or 'router end' protocol over WAN connections. IP Office supports both PPP and RFC1490

encapsulation with fragmentation of large data packets to provide voice quality of service.

Service Quotas

IP Office can be configured to limit the maximum number of minutes that a service, such as Internet Access, is

available for each user. This is the sum total of calls made and does not include periods of inactivity. Once the

quota has been used the service is no longer available. The quota can be either automatically refreshed daily,

weekly or monthly or manually refreshed by dialing a secure feature code on a handset.

Time Profiles

Time profiles set the operational times for service. For example, a time profile could be set up to make

Internet Access available to staff only during lunch times. Using time profiles it is also possible to define an

alternative service to operate outside the operational hours of the main service. This may be used to take

advantage of alternative tariffs at off peak periods. Switching to this fallback service can also be controlled

manually by dialing a secure short code from a handset. This can be particularly useful in allowing quick

restoration of service in the event of an ISP failure. This feature also applies to days of the week or specific

calendar dates.

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Reliant Octel 300 Spezifikationen Seite 165