Trunks
ISDN
Strata CTX Programming - Part 2: CTX WinAdmin Programming 6/04 6-29
Trunks
Call-by-Call
System Availability: Not available with CTX28
Program Number(s): 324 and 323
Call-by-Call service allows multiple facilities to share a PRI channel group. Traffic requirements of
different facilities vary at different times, and sharing B channels on a Call-by-Call basis makes it possible
to use fewer B channels to perform an equivalent service to the discrete counterpart.
1. Complete the “324 CBC Time
Zones” on page 6-30.
2. From the Program Menu, click
Trunk > ISDN > Call by Call. The
ISDN Call by Call Service screen
displays (shown right).
3. Enter Channel Group number.
4. Enter Program 323 data.
5. Enter Program 324 data.
6. Click Submit.
323 CBC Service
Prerequisite Program: 302 page 6-25
Call-by-Call service allows multiple facilities to share the PRI channel group. Since the traffic
requirements of each facility may vary at different times, it becomes possible to use fewer ‘B’ channels to
perform the equivalent services of the discrete counterpart. This sharing the ‘B’ channels on a call-by-call
basis can save the user money. To accomplish CBC services, each facility needs to be defined, its related
Line Group assigned and minimum and maximum values for the services provided. These service
parameters may be set for three different time zones, thus allowing fewer or more services of different
types at different times of the day. Complete the “Call-by-Call Record Sheet” on page D-30.
FIELD DESCRIPTION
Channel Group Enter the Channel Group Number.
Possible values: 1~32 (CTX100), 1~48 (CTX670 Basic),
1~128 (CTX670 Exp.), (default = no value)
01 Index Enter the CBC Service Index, or click one of the following buttons:
• List – view a summary list of programmed Trunks.
• Create – Assign a new Trunk with default settings.
Possible values: 0~32 (CTX100), 0~48 (CTX670 Basic),
0~128 (CTX670 Exp.), (default = no value)
02 Type of Service Select the CBC Service Type.
Note To delete CBC, set this field to 1: No Data.
Possible values: No data (default), POTS, FX, Tie Line (Enbloc), Tie Line (Cut through),
Intra LATA Out WATS, Banded Out WATTS, Inter LATA Out WATS or
INWATS