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Japan TTC Q931-a Private Networking Protocols B Private Networking
Administration for Network Connectivity
CID: 77730 555-233-504 — Issue 1 — April 2000
400
Japan TTC Q931-a Private Networking Protocols
The Telecommunications Technology Committee (TTC) of Japan defines national standards that are to be used in
domestic public and private network facilities. The TTC typically modify other international standards as
defined by ITU-T for use in Japan with additional national protocols to enhance operation for their customers.
Overview
The TTC has defined a family of Q931-a private networking protocols that allows for
a level of feature transparency between different switches within a single vendor or
multi-vendor private network. DEFINITY ECS provides connectivity into the
Japanese private networking environment via two methods
• CAS (Channel Associated Signaling) — first developed in DEFINITY ECS R7
for the Japan market (See the description of TN2242 Japan 2Mbit Trunk in
DEFINITY ECS R8 System Description, 555-233-200.)
• ISDN (Integrated Services Digital Network) PRI (Primary Rate Interface) —
TTC specific protocol newly support in DEFINITY ECS R8. DEFINITY ECS
supports Basic Call with Number Identification services.
TTC Basic Call Setup with Number Identification Supplementary Service
DEFINITY ECS allows the display of the calling party number to the called party.
DEFINITY ECS also displays the connected number to the calling party after the call
connects to the called number of another destination. For many protocols, Number
Identification is considered to be part of Basic call; however, the TTC protocol
defines Number Identification services to be part of their supplementary services
offering. No additional supplementary services are supported at this time.
You can administer outgoing calls as “yes”, “no", or “restricted.” Restricted means
that DEFINITY ECS sends the information but sends it “presentation restricted,”
which indicates to the receiving switch that the information should not be displayed.
A received restricted number is included on the Call Detail Record (CDR).