NEC Electra Elite 48/192 Features And Specifications Manual page 365

Issue 6
G - 4
Sixty-four trunks (Ground Start, Loop Start, E&M Tie Lines and DID
¥
Trunks) can be installed in the Electra Elite 192 system, or 16 trunks,
in the Electra Elite 48 system.
¥ Each Multiline Terminal can have a Drop key assigned (when
allowed in System Programming) to be used for abandoning a call
and seizing the same CO line on either a Flexible Line or One-Touch
key.
¥ The Recall key can be used for a flexible timed hookflash when
Least Cost Routing is installed.
Electra Elite
Ground Start Trunks