Electra Elite IPK II Document Revision 1
Caller ID 2 - 145
Caller ID
Description
Caller ID allows a display terminal to show an incoming caller’s telephone number (called the Directory
Number or DN) and optional name. The Caller ID information is available as pre-answer display. With
the pre-answer display, the user previews the caller’s number before picking up the ringing line.
On the CPUII for Caller ID (also used for DTMF receivers and Call Progress Tone Detection) there are 32
resources available. The DSPDB provides an additional 32 resources.
Second Call Display
While busy on a call, the telephone display can show the identity of an incoming trunk or Intercom call.
For incoming trunk calls, the display will show the Caller ID or ANI data or the trunk’s name if Caller ID or
ANI are not installed. (Refer to T1 Trunking (with ANI/DNIS Compatibility) on page 2-803 for more
information on ANI compatibility.) For incoming Intercom calls, the display will show the calling
extension’s name.
Caller ID supports the Telco’s Called Number Identification (CNI) and Called Number Delivery (CND)
service, when available. These services provide the Caller ID information (i.e., messages) between the
first and second ring burst of an incoming call. There are two types of Caller ID message formats
currently available: Single Message Format and Multiple Message Format. With Single Message
Format, the Telco sends only the caller’s telephone number (DN). The DN is either 7 or 10 digits long. In
Multiple Message Format, the Telco sends the DN and the caller’s name. The DN for this format is also 7
or 10 digits long, and the name provided consists of up to 15 ASCII characters.
The telephone display can show up to 12 Caller ID digits (for non-ACD calls).
Once installed and programmed, Caller ID is enabled for all types of trunk calls, including:
J
Ring Group calls
J
Calls transferred from another extension
J
Calls transferred from the VRS
J
Calls transferred from Voice Mail (unscreened)
J
Direct Inward Lines (DILs)
Caller ID temporarily stores 50 calls (total of abandoned and answered/unanswered). New calls replace
old calls when the buffer fills.
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