Parameter
Possible values
Packetization Delay
No data or an integer number of milliseconds. The number reflects the
amount of delay in received audio packets, and includes any potential
delay associated with the codec.
One-way Network Delay
No data or an integer number of milliseconds. The number is half the
value RTCP or SRTCP computes for the round-trip delay.
Network Jitter Compensation
Delay
No data or an integer number of milliseconds reporting the average
delay that is introduced by the jitter buffer of the phone.
Internal microphone
The system specifies whether internal microphone is on or off.
Internal speaker
The system specifies whether internal speaker is on or off.
The implication for LAN administration depends on the values the deskphone user reports and the
topology, loading, and QoS administration for the LAN. This information gives the administrator an
idea of how network conditions affect the audio quality of the current call. Avaya assumes you
have more detailed tools available for LAN troubleshooting.
IP address list and station number portability
You can specify IP address lists on the phone. On startup or on restart, the phone attempts to
establish communication with these various network elements in turn. The phone starts with the
first address on the respective list. If the call server denies communication with the phone or the
session times out, the phone continues to the next address on the appropriate list and tries that IP
address. The phone does not report failure unless all addresses on a specified list fail, improving
the reliability of IP telephony.
The address list and station portability capability also make station number portability possible.
Assume a situation where the company has multiple locations in London and New York, that share
a corporate IP network. Users want to take the phones from the London office to New York office.
When the user starts the phones in the new location, the local DHCP server usually routes the
user to the local call server. The local DHCP server if configured correctly, registers the user with
call server IP address in London.
TCP/UDP Port utilization
The phone use many protocols, particularly TCP (Transmission Control Protocol), UDP (User
Datagram Protocol), and TLS (Transport Layer Security) to communicate with other equipment in
the network. Part of this communication identifies which TCP or UDP port each piece of
equipment uses to support each protocol and each task within the protocol.
Depending on your network, you must know what ports or ranges to use in the phone operation.
Knowing these ports or ranges helps you administer your networking infrastructure. For additional
information, see the
.
Note:
Often, the phones use ports defined by IETF or other standards bodies.
Administering your phone
May 2018
Installing and Administering Avaya J169/J179 IP Phone H.323
64
