Specifications

Product Description
IP Office Release 7.0
© 2011 AVAYA All rights reserved.
Page 268
Issue 22.a.- (21 March 2011)
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.
Password Authentication Protocol (PAP)
PAP is a method of authenticating the remote end of a connection using unencrypted passwords.
Challenge Handshake Authentication Protocol (CHAP)
Challenge Handshake Authentication Protocol allows an incoming data call to be authenticated using encrypted
passwords. The system also provides the option to periodically reaffirm the authenticity of the caller during the
data call.
Data Header Compression
IP Header Compression (IPHC) reduces the header size of the data packet to gain bandwidth efficiency over
Wide Area Networks, but adds to transmission latency.
Data Compression
IP Office supports both Microsoft Point to Point Compression and Stac Lemple Ziv to provide greater throughput
on slow speed wide area network links.
Bandwidth Allocation Control Protocol (BACP)
Bandwidth Allocation Control Protocol allows the negotiation with the remote end of the data call to request
additional calls to be made to improve aggregate data throughput.