Avaya 4600 Series manual UDP Port Selection, QoS with 4620 and 4630 IP Telephones

4600 Series IP Telephone LAN Administrator’s Guide

encodings that do not terminate in 000. The specific treatment intended by these custom DSCPs will not necessarily be carried out by routers outside the customer’s own network.

To support DiffServ, the 4600 Series IP Telephones are administered at the switch in accordance with the documentation for the switch.

UDP Port Selection

Some data networks include equipment that can perform UDP port selection. This is a mechanism by which packets with port numbers in a given range are given priority over packets with port numbers outside that range.

To support UDP port selection, the 4600 Series IP Telephones can be administered either from the network, via appropriate administration of the DHCP or TFTP servers, or at the telephone itself, via dialpad input. Specific implementation details for local administration are in the 4600 Series IP Telephone Installation Guide, and, for remote administration, in 4600 Series IP Telephone Scripts and Application Files on page 4-18.In summary, the system value MCPORT represents the port on the TN2302AP board. This port number can be used to administer routers, etc. that support UDP port selection, to maximize the priority given to the voice packets being exchanged between the PBX and the telephone.

The default value for MCPORT is 1719. The switch must be administered to use a port within the proper range for the specific LAN, and the IP Telephone(s) will copy that port. A related parameter is PORTAUD, which is the RTP port used by the switch. In accordance with standards RFC 1889 and 1890, the IP Telephone uses a default value for PORTAUD of 5004. MCPORT and PORTAUD are both administrable (see Administering Options for the 4600 Series IP Telephones on page 4-24).

QoS with 4620 and 4630 IP Telephones

As of Release 1.7, both the 4620 and 4630 telephones offer the end user an opportunity to monitor network audio performance while on a call. The user guides for each phone go into specific details on how the user gets to the appropriate screen; this document tells you what the end user can see, and what it means. Specifically, the following parameters are displayed in real-time to users on the appropriate screens, while on a call:

Parameter	Possible Values
Audio Connection Present?	Yes (if a receive RTP stream has been established)
	No (if a receive RTP stream has not been established)
Received Audio Coding	G.711 or G.729
Silence Suppression	Yes (if the telephone knows the far-end has silence
	suppression Enabled)
	No (if the telephone knows the far-end has silence
	suppression Disabled, or the telephone does not know
	either way)
QoS
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