5.1.4  
Trunk Keys 
 
Implementing features, see also Manager E Trunk Keys

Definition  
On optiPoint telephones, users can program trunk keys by B channel. This enables them to answer a call or seize a trunk by pressing the trunk key. The LED signals the trunk status.

 LED  
 Meaning  
 Effect of pressing a key  
Off  
Trunk is free  
Immediate seizure of trunk  
On  
Line is busy or has failed.  
 
Flashing slowly
(750 ms on/750 ms off)  
Trunk is on hold  
The line on hold is reconnected and the connection becomes active again.  
A distinction is made between:  
 •   Exclusive call hold = the slowly flashing LED is only displayed to the station holding the call.
 •   General call hold = the slowly flashing LED is presented to all stations at which the held trunk is programmed on this key.
Flickering
(50 ms on/100 ms off)  
Your own telephone is called via the line programmed on this key.  
Immediate connection to the calling station via the trunk programmed here.  
Note: Multiple parallel waiting calls are signalized by the flickering of several trunk keys, provided that the respective trunks are programmed on those keys. The subscriber being called can select and answer a call by pressing one of the flickering keys, regardless of the call shown on the display.  
Users can use the trunk keys for the following features:
 •   Call pickup
 •   Retrieve trunk on exclusive hold
 •   Retrieve trunk on common hold
 •   Answer calls
 •   Toggle between several different trunks
A Trunk key is used for receiving incoming trunk calls and placing outgoing calls on the selected trunks. A Trunk key represents an analog CO trunk appearance, a BRI link appearance, a T1 DS0 channel, or an analog E&M Tie line channel.
A Trunk key cannot be programmed on the same station that is using Call Keys to manage the trunk group associated with the trunk appearance.  
A Trunk key can appear on more than one station. All stations with the appearance of the Trunk key can also ring on an incoming call, if they are programmed in a Call Group, otherwise they only have LED signalization.
A user can place a trunk appearance on Common Hold by pressing the Hold key and going on-hook. The trunk appearance will flash slowly at all other appearances of the Trunk key.
Calls placed on Trunk keys are subject to COS toll restriction levels and rules.
Trunk keys can be used in a Centrex environment. The system can cut through immediately to the Centrex CO to allow the user to hear if special tones, indicating Message Waiting. In this case, Dial Tone Detection must be turned off because the special CO tones are not recognized by the HiPath 3000 as dial tone.
Feature Interaction:
 •   Call pickup: An incoming call ringing on a Trunk key can be picked from another station via the feature Call Pickup - Group or via Call Pickup - Directed.
 •   Retrieve trunk on exclusive hold: A Trunk key is placed on exclusive hold at the station which put it on Hold by pressing another flashing Trunk key, which results in a Toggle operation. To retrieve the held trunk, the user needs only to press the flashing key.
 •   Retrieve trunk on common hold: Another user with the appearance of the same Trunk key, can retrieve a trunk call on Common Hold (Appearance flashing slowly) by pressing the flashing key.
 •   Answer calls: Any user with the appearance of the trunk can answer an incoming call on the Trunk key by pressing the flickering Trunk key.
 •   Toggle between several different trunks: If a user has an appearance of several Trunk keys on his or her telephone, the user can toggle between any of the trunks by pressing the desired Trunk key. The first trunk is placed on Consultation Hold at the station. Any subsequent depression of another Trunk key places the last call on Consultation Hold at that telephone. If the user goes on-hook at any point, the last held party is immediately recalled per the Consultation Hold procedure.
 •   Call forwarding: An incoming call appearing on a Trunk key can be forwarded by the station to another destination. If the forward destination does not have an appearance of the trunk, the user can handle the call via the dialog keys as a normal incoming call. If the forward station answers the call, the LED on all appearances of the Trunk key will be steadily lit.
    If the station has forwarded the external calls to a voice mail system, the original destination's station number is forwarded to the voice mail system.

Operation  
If the default station templates are in effect, this feature can only be used on display telephones.
 •   Placing a call: The user presses an idle Trunk key. Simulated dial tone can be presented to the user until the trunk cuts through (See Routing Parameters -> Analog Trunk Seizure delay).
 •   Receiving a call: An incoming call is signalled audibly and visually at the station. The display shows the trunk group name. If caller ID is available, the user display will indicate the calling party's caller ID number. Calling party name is not available. The user presses the flickering key to answer the call.

Model-Specific Data  

 Subject  
 HiPath 3800  
 HiPath 3550  
 HiPath 3500  
 HiPath 3350  
 HiPath 3300  
Feature available in  
 x  
 x  
 x  
Hardware requirements  
 UP0/E device  
Software requirements  
 V5.0 or later  
 V1.0 or later  
 V1.0 or later  

HiPath 3000/5000 V8, Feature Description, Issue 10   up Top
Disclaimer & Copyright   ID: P31003H3580F100017618   2011-02-07