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Advanced Operational Features
41-001343-02 REV04 – 05.2014 6-3
Advanced Operational Features
Description
This section provides the following information about advanced features of the IP phones:
Feature Description
TR-069 Support The IP Phones support the Technical Report (TR) 069 Protocol, a Protocol that provides the
communication between Customer-Premises Equipment (CPE) (like the IP Phones) and
Auto Configuration Servers (ACS) over DSL/broadband connections.
MAC Address/Line Number in REGISTER Messages Allows you to enable or disable the sending of the MAC address and line number from the
IP phone to the call server, in a REGISTER message.
SIP Message Sequence for Blind Transfer Allows you to enable or disable the phone to use the Blind Transfer method available in
software prior to release 1.4.
Update Caller ID During a Call Allows you to enable or disable the updating of the Caller ID information during a call.
Boot Sequence Recovery Mode Allows you to enable or disable Web recovery mode and set the maximum boot count on
the IP phone.
Auto-discovery Using mDNS The IP phones automatically perform an auto-discovery of all servers on a network using
mDNS. When the IP phone discovers a TFTP server, it is automatically configured by that
TFTP server.
Single Call Restriction Allows you to enable or disable a single call restriction between the 6757i CT base unit and
a call server.
Missed Call Summary Subscription Allows missed calls that have been redirected by the server, to be incremented in the
missed calls indicator on the phone it was initially directed to.
As-Feature-Event Subscription Allows you to enable or disable a specific line on the phone with the BroadSoft’s server-side
DND, CFWD, or ACD features.
Blacklist Duration Allows you to specifies the length of time, in seconds, that a failed server remains on the
server blacklist. The IP phone avoids sending a SIP message to a failed server (if another
server is available) for this amount of time.
Whitelist Proxy Allows you to configure the phone to either accept or reject call requests from a trusted
proxy server.
Transport Layer Security (TLS) Allows you to enable or disable the use of Persistent Transport Layer Security (TLS).
Persistent TLS sets up the connection to the server once and re-uses that connection for all
calls from the phone. The setup connection for Persistent TLS is established during the reg-
istration of the phone. If the phones are set to use Persistent TLS, and a call is made from the
phone, this call and all subsequent calls use the same authenticated connection. This sig-
nificantly reduces the delay time when placing a call.
802.1x Support Allows you to enable or disable the 802.1x Protocol support on the IP Phones.
Symmetric UDP Signaling Allows you to enable or disable the phone to use port 5060 to send SIP UDP messages.
Symmetric TLS Signaling Allows you to enable or disable the phone to use port 5061 to send SIP TLS messages.
Removing UserAgent and Server SIP Headers Allows you to enable or disable the addition of the User-Agent and Server SIP headers in
the SIP stack.
GRUU and sip.instance Support The IP phones provide GRUU support using draft-ietf-sip-gruu-15. A sip.instance is added
to all non-GRUU contacts.
Multi-Stage Digit Collection (Billing Codes) Support (for
Sylantro Servers)
IP Phones support Sylantro Server features, like mandatory and optional billing codes that
require the application server to notify the phone to collect more digits before completing
the call. The IP phone is able to collect digits in two stages to support the billing code fea-
ture.
Configurable DNS Queries Allows you to specify the Domain Name Service (DNS) query method to use when the
phone performs a DNS lookup.
Ignore Out of Sequence Errors Allows you to configure the phone to ignore CSeq number errors on all SIP dialogs on the
phone.