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Configuring Dial Plan Settings
4-60 41-001190-02 Rev. 01, Rel. 1.2
AastraLink Pro 160 Administrator Guide
Configuring FXO Lines for Shared Line Appearance (SLA)
The AastraLink Pro provides Shared Line Appearance (SLA) which provides key
system features in addition to its existing Private Branch eXchange (PBX)
functionality.
SLA and PBX can be used exclusively (i.e. all FXO lines as SLA, or all FXO lines
as PBX) or in a mixed mode. To differentiate between modes, the AastraLink user
interface refers to non-SLA lines as ’Pool’ lines, as they provide pooling of
incoming and outgoing lines for call processing purposes.
About Shared Line Appearances
A traditional key system has telephones with multiple buttons ("keys") and lights
that indicate which lines are in use. When you want to place a call, the user
presses a button to directly select the external FXO line connected to the
telephone company.
AastraLink SLA is supported on all Aastra SIP phone models (except 420d DECT
handsets and 51i SIP phones) and uses a visual indication to show the line state
(idle/ringing/in-use/hold). Indications are provided via the LED on a line hard-key
(L1, L2, etc.), LCD on a soft-key, or LED on a programmable key.
The state of the line - busy, ringing or hold - is shown by the flashing state of the
LED or icon indicator; for hard-keys the color of the indicator also shows whether
the current phone (green) or another phone (red) is using the line.
On the 9480i, 9480i CT, 6755i, 6757i, and 6757i CT, the busy and idle indicators
show on the IP phone screen display next to the softkey or programmable key
configured for SLA functionality. When the monitored user is idle, an icon with
the handset on-hook shows next to the SLA softkey or programmable key. When
the monitored user is on an active call, a small telephone icon is shown with the
handset off-hook.
On the 9143i, 6751i, and 6753i, the LED lights next to each SLA programmable
key illuminate steady to indicate the monitored line is off-hook or unregistered.
The LED goes off when the line is idle.