Panasonic ICX Technical Manual page 51

Section 200 - General Description
System Feature
Tandem Connection
Telephone Programming
TRS (Tall Restriction Service)
Traffic Measurement
Trunk Groups
Trunk Name Assignment
UNA (Universal Night Answer)
Virtual Ports
Voice Mail Interface
Walking TRS
ICX-40-200
Notes
E&M and AC15, Q-sig
(available on display phones only)
Outgoing calls can be allowed/blocked based on the path
(originating ext.-to-seized-trunk) and dialed digits
trunk (separate inbound/outbound) and intercom call traffic;
30-minute interval storing/printout via programming
inbound and outbound; up to 99 groups per system; 96
members/cabinet in each group; MCO trunk group chaining
(available on display phones only)
incoming calls ringing over the paging system
for multiple ringing, floating park, etc.
built-in and 3rd-party analog/digital
codes for overriding TRS on a phone
ICX (International) issued December 1999
Chapter 3 - System Features
51