Instruction manual

Features
When a call is placed on a Call-by-Call B-channel group, the dialed number and
type of call must match one of the entries, the specified number of digits is
deleted, and the specified service is selected. Similar patterns for the same
type of call are permissible in this table; in such a situation, the feature will
select the entry with the longest matching pattern. For example, based on the
entries in Table 32 and a voice call with a CdPN of 908957, entry 2 will be
selected, not entry 3. The last entry will be used if the patterns are of equal
matching digits.
For each entry, the following can be specified: a set of patterns, the type of call,
the service to use, and the number of digits to delete.
Characteristics and valid entries for the Call-by-Call Services Table are as
follows:
■ By default, the patterns are blank; Call Type is Both, Service is blank,
and Delete Digits is 0.
■ There can be up to 10 entries (0 through 9).
■ Each entry can contain up to 10 patterns of up to 8 digits each.
■ The number of digits to delete can be from 0 through 8 (default is 0).
■ The user can use an entry as a default by selecting a Call Type and
Service and not specifying any patterns.
■ If Service is null (not selected), the entry is ignored. Null and “No
Service” are not equivalent.
Call-by-Call Service Selection closely resembles ARS in reducing costs and
maximizing the benefits derived from limited resources. While ARS selects the
most cost-effective route, Call-by-Call Service Selection selects the optimal
service for that particular call. Call-by-Call Service Selection is integrated with
ARS by including the bearer capability of the calling party in its routing
decisions. As such, ARS is the main gateway for accessing the Call-by-Call
B-channel group. The basic call origination process for Call-by-Call Service
Selection with ARS is as follows:
1.
2.
3.
4.
5.
A user dials ARS.
ARS selects the route and, in this case, the route points to a Call-by-Call
B-channel group.
ARS performs digit deletion/addition operations for the route that may
indirectly specify the best service for the call.
With these ARS outgoing digits, the Call-by-Call B-channel group selects
the service, possibly based on digits added by ARS, and performs digit
deletion as required.
A call Setup message is sent to the network/central-office switch.
366 Primary Rate Interface (PRI)