Aastra Telecom SISIP 57I CT - Manual (Page 59)

Administrator Level Options
41-001160-00, Rev 01 Release 2.0 3-19
Administrator Options
Administrator Options • Registration Renewal Timer
The length of time, in seconds, prior to expiration, that the phone renews
registrations.
• BLF Subscription Period
Specifies the time period, in seconds, that the BLF feature becomes active
again after a software/firmware upgrade or after a reboot of the IP phone.
RTP Settings
You can configure the following RTP settings:
•
RTP Port
• Basic Codecs (G.711 u-Law, G.711 a-Law, G.729)
(not configurable via IP phone UI). Enables or disables basic codecs.
Enabling this parameter allows the IP phone to use the basic Codecs when
sending/receiving RTP packets. Valid values are 0 (disabled) and 1 (enabled).
Default is 0 (disabled).
• Force RFC2833 Out-of-Band DTMF
(not configurable via IP phone UI). Enables or disables out-of-band DTMF.
Enabling this parameter forces the IP phone to use out-of-band DTMF
according to RFC283. Valid values are 0 (disabled) and 1 (enabled). Default is
1 (enabled).
• Customized Codec Preference List
(not configurable via IP phone UI). Specifies a customized Codec preference
list which allows you to use the preferred Codecs for this IP phone. For valid
values, see Appendix A, the section,
“RTP, Codec, DTMF Global Settings” on
page A-63.
• DTMF Method
(not configurable via IP phone UI). Sets the dual-tone multifrequency
(DTMF) method to use on the IP phone on a global or per-line basis. Valid
values are 0 (RTP), 1 (SIP INFO), or 2 (BOTH). Default is 0 (RTP).
Configurable on a global and per-line basis.
• Silence Suppression
Enables or disables the phone to use the negotiated silence suppression
setting.