System information

System Administration Guide
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Revised: March 28, 2007
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 It affects how the Hold button on a handset works. When in Key System mode, the Hold button
performs a system wide call park operation that allows the call to be picked up by any handset. When
in PBX mode or the active call is on a Call Appearance PFK, the Hold button performs a station based
hold operation that is exclusive to the handset.
Call History Size
– Specifies the number of calls the station will keep in call history. If you specify a value of
zero, the phone will not maintain a Call History to help preserve the handset user’s privacy.
Clock Mode
– This specifies whether the phone station should display its idle screen clock in 12 hour or 24
hour format. There is an option also to disable the clock display if the phone is not synchronized to network
time or for some reason the handset user does not wish the time to be displayed.
Codec Preference Order – Sets the preferred codec order in the phone. The codec is the method of
encoding/decoding the audio sent to and received by the phone. The two possible codec’s are G.711 and
G.729A. G.711 preserves voice quality, but takes more bandwidth. G.729A takes less bandwidth, but
reduces voice quality.
Note: This only sets the preferred codec order. Not all codec’s are supported for all call types (for example,
accessing the server Auto Attendant requires G.711). To maintain operability, the phone will use
whichever codec is required to support the call. This means that your preferred codec won’t always
be the one used.
Daylight Savings Time
– Specifies the daylight savings time rule the handset uses to compute its local time.
Typically you will want to use the Use Current Server Setting option if the telephone station is local to the
same time zone that the server is in. However, for remote phones, you may want to force a different daylight
savings time observance based on the locale the phone is physically located.
Hold Reminder Mode
– This parameter specifies how the phone operates relative to a hold reminder. Hold
reminder is a feature to remind the handset user that they have left a phone on hold:
 No Reminder
– Never remind the user.
 On Hook
– Beep when ever the phone is put on-hook with call(s) on hold.
 Timer
– Beep after the call has been on-hold for the specified period of time.
 On Hook and Timer
– Beep after the call has been on-hold for the specified period of time or if the
handset is placed on hook.
Jitter Buffer Size
– Jitter is a variation in network audio packet latency experienced by the phone, resulting in
a reduction in audio quality. The phone uses a jitter buffer to maximize the audio quality when jitter occurs.
This configuration parameter can be used to alter the size of the jitter buffer.
Message Waiting Indication – This parameter indicates how the phone should display indication of a
voicemail message waiting for the user who is the owner of this handset. If the station has no owner, then this
setting has no meaning. The possible settings are:
 Visual
– The red LED indicator on the Messages button is illuminated.
 Stutter Dial Tone
– The station emits a stutter when a dial tone is started for each call.
 Both
– The station does both of the above.