| Introduction |
Figure 6-5 highlights the ability of the system to be able to set the protocol between network side and user side for each D channel it uses. Since the PBX can only run the user side protocol, the system must run the network side protocol on the D channel connected to the PBX. However, on the D channels connected to the carrier switches, the system must run the user side protocol.
Carrier A |
| Carrier B |
ISDN Switch |
| ISDN Switch |
Network Side | Network Side | |
23B+D |
| 23B+D |
User Side |
| User Side |
|
| NFAS 47B+D |
| IAD | ISDN PBX |
| Network Side | User Side |
|
| |
Figure 6-5. Network and User Side Protocols
Server Cards |
