Telephone Line Emulator User’s Manual
40-400-00020, Rev. M 18
Trailing Blank, or the delay after the call waiting tone is sent, may be set from 20 mS to
100 mS off in 5 mS increments.
The Leading Blank time is the time from when the existing call is muted and the Call
Waiting starts. The Trailing Blank time is the time from when the Call Waiting stops and
the existing call is reconnected.
Caller ID - Visual Message Waiting
The Caller ID signal is an FSK signal sent at 1200 baud to alert the called party of the
identity of the calling party. This may consist of the telephone number only, (Single
Message Format), or a Name and Number (Multiple Message Format). The transmission
also includes a Date and Time, and issues a checksum at the end for error correction.
Special sequences include Out of Area ∗87 (indicates no available information for the
caller), Private ∗67 (Blocked Call) and an error message ∗88 (checksum error) when a
special prefix code is dialed before the normal telephone number. For testing and
development purposes, there is a special mode where the Caller ID is sent after every
ring. (TLE-ADV only.)
Visual Message Waiting is an FSK signal sent at 1200 baud to turn on a visual indicator
on an adjunct or Caller ID phone. This signal is sent during an on-hook state after an
open switch interval.
Turn ON the Visual Message Waiting Indicator using the following dial sequence;
Dial ∗50 + “Called Telephone Number”
Turn OFF the Visual Message Waiting Indicator using the following dial sequence;
Dial ∗51 + “Called Telephone Number”
Example: A Caller ID adjunct or display phone is connected to Line 2. From a telephone connected
to any other line, go off-hook and dial *50 102. The display for the called line will indicate
VMW sent during the time when FSK is generated after the Open Switch Interval.
Stuttered Dial Tone is issued to the called line until VMWI OFF is invoked or the Dial
Access Audio Message is dialed. Default is 411.
Note: The TLE-ICID Software Module is available as an upgrade to the TLE-INTL Software
Module. This upgrade module combines the Call Waiting screen and the Caller ID screen.
The TLE-INTL software will allow Caller ID to be enabled for other countries but it
conforms to the Bellcore (USA/Canada) standards.
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