ASCOM Ascotel 2025 System Manual page 333

ascom Ascotel 2025/2045/2065
Indirect Network Access
The PBX is connected to a specific network (network A). The destination network
(network B) is reached indirectly via this network. This case occurs frequently.
Fig. 2.78: Indirect access to network B via network A using LCR
For indirect access the phone number dialled must contain the following informa-
tion:
• Phone number of the destination subscriber.
• Network provider required (in the example network provider B).
• The code information (in the example for network provider B) used by B to
check whether the caller is a subscriber to his network.
Network provider A can respond to the call in the following way:
• He either routes the destination number on directly using his own numbering
plan.
• He takes the call and waits for code information, such as the destination
number, to be transmitted by the caller in DTMF mode.
2.156 Call Routing
Network A
Network B
PBX
LCR
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