Application Scenarios for CE1/PRI Interfaces
Application Scenario of CE1/PRI Interfaces (E1 Mode)
As shown in Figure 5-1, the headquarters and branch of an enterprise are connected by the transmission network of a carrier. The enterprise leases a 2 Mbit/s E1 line from the carrier.
Application Scenario of CE1/PRI Interfaces (CE1 Mode)
As shown in Figure 5-2, the headquarters and branch of an enterprise are connected by the transmission network of a carrier. Multiple low-rate (128 kbit/s or 256 kbit/s) E1 channels are required to transmit different services. In this scenario, timeslots in the E1 line need to be bundled into multiple channels. Each channel transmits a service. For example, two timeslots are bundled to transmit the voice service, and four timeslots are bundled to transmit the data service.
Application Scenario of CE1/PRI Interfaces (PRI Mode)
As shown in Figure 5-3, the headquarters and branch of an enterprise are connected by the integrated services digital network (ISDN) of a carrier. The routers of the enterprise connect to the ISDN through ISDN PRI interfaces.