Server Administration

-Option 57 - Maximum DHCP message size.

-Option 58 - DHCP lease renew time.

If not received or if this value is greater than that for Option 51, the default value of T1 (renewal timer) is used as per IETF RFC 2131, Section 4.5, listed in Related Documentation.

-Option 59 - DHCP lease rebind time.

If not received or if this value is greater than that for Option 51, the default value of T2 (rebinding timer) is used as per RFC 2131, Section 4.5

The 9600 Series IP Telephones do not support Regular Expression Matching, and therefore, do not use wildcards. For more information, see Administering Options for the 9600 Series SIP IP Telephones on page 73.

In configurations where the upgrade script and binary files are in the default directory on the HTTP server, do not use the HTTPDIR=<path>.

Avaya recommends that you administer DHCP servers to deliver only the options specified in this document. Administering additional, unexpected options might have unexpected results, including causing the IP telephone to ignore the DHCP server.

The SIP Proxy server name and HTTP server name must each be no more than 32 characters in length.

Examples of good DNS administration include:

-Option 6: “aaa.aaa.aaa.aaa

-Option 15: “dnsexample.yourco.com,zzz.zzz.zzz.zzz

-Option 42: "aaa.aaa.aaa.aaa"

Depending on the DHCP application you choose, be aware that the application most likely does not immediately recycle expired DHCP leases. An expired lease might remain reserved for the original client a day or more. For example, Windows NT® DHCP reserves expired leases for about one day. This reservation period protects a lease for a short time. If the client and the DHCP server are in two different time zones, the clocks of the computers are not in sync, or the client is not on the network when the lease expires, there is time to correct the situation.

The following example shows the implication of having a reservation period: Assume two IP Addresses, therefore two possible DHCP leases. Assume three IP telephones, two of which are using the two available IP Addresses. When the lease for the first two telephones expires, the third telephone cannot get a lease until the reservation period expires. Even if the other two telephones are removed from the network, the third telephone remains without a lease until the reservation period expires.

58 9600 Series SIP IP Telephones Administrator Guide SIP Release 2.0

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Avaya 9600 manual Option 59 Dhcp lease rebind time

9600 specifications

The Avaya 9600 series is a robust line of desktop phones designed to meet the needs of modern business communication. Tailored for users who require advanced functionalities, the 9600 series offers a rich set of features that enhance productivity and collaboration in the workplace.

One of the standout features of the Avaya 9600 series is its high-resolution graphical display. The intuitive interface with customizable menu options makes it easy for users to navigate through various functions and settings. The color screen enhances visibility and allows for clearer visual communication, essential for today’s fast-paced business environments.

In terms of audio quality, the Avaya 9600 series excels with high-definition voice technology. Users can benefit from crystal-clear audio, which minimizes misunderstandings during calls and enhances remote collaboration. The phones are equipped with full-duplex speakerphone functionality, ensuring that all parties can be heard clearly during conference calls.

Another significant characteristic of the Avaya 9600 series is its support for a wide range of communication protocols, including Voice over IP (VoIP) and SIP (Session Initiation Protocol). This versatility enables seamless integration with various communication systems, making the 9600 series suitable for companies of all sizes. The phones can connect to both cloud-based and on-premise solutions, allowing businesses to choose the best communication strategy for their needs.

User personalization is a key aspect of the 9600 series. The phones come with programmable function keys that allow users to customize their setup according to individual preferences and frequently used features. Additionally, the series supports Bluetooth and USB connectivity, enabling users to connect a variety of headsets and accessories for enhanced audio options.

Security is paramount in business communications, and the Avaya 9600 series addresses this with advanced security features. The phones support encryption protocols to protect sensitive information during calls, ensuring that businesses can communicate confidentially without the risk of eavesdropping.

Lastly, the Avaya 9600 series is designed for scalability. As organizations grow, the phones can easily be integrated into existing systems or expanded to accommodate additional users without requiring significant changes to the infrastructure.

In summary, the Avaya 9600 series is a powerful communication tool that combines advanced features, superior audio quality, and robust security to empower businesses. Its adaptability and user-friendly design make it a preferred choice for organizations aiming to enhance their communication efficiency and productivity.