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Cisco MGX 8220 Installation and Configuration
Release 5.0, Part Number 78-6430-03 Rev. D0, November 2003
Chapter
Frame Relay Service Modules (FR SMs)
Figure4-7 Using FRASM for a FRAS BNN Connection
Using FRAS BNN, the FRASM supports
•Point-to-point SDLC/Frame Relay lines.
•Multidropped devices over a single lo gical port. These can be assigned to d iffer en t c onnections.
•Only one DLCI to a single lo g ica l p o rt .
•Only one connection to a single DLCI.
•One PVC for each logical po rt.
•Two-way simultaneous device transmission.
•Two-way simultaneous mode between different devices.
The supports 8-T1 lines with each line supporting up to 24-DS0 ports for a total of 192 logical ports.
The physical interfaces can be co nfigu r ed as fo ll ows:
•DS0-A 2.4 kbps with or without NRZI
•DS0-A 4.8 kbps with or without NRZI
•DS0-A 9.6 kbps with or without NRZI
•DS0 56 kbps with or without NRZI
•DS0 64 kbps without N RZ I
The card data throughput is 1392 kbps. This can be used as 145 ports at 9.6 kbps ports or 24 ports at
56kbps or any combination of configurable port speeds for a tota l up thro ug h and i nc ludi ng 1 392kbps.
(See Figure 4-8.)
Remote Bisynch
End User Device SDLC FRASM
ATM network
Frame Relay
over ATM
MGX
8220 MGX
8220 FRSM
Frame
Relay Front-end
Processor
NCP 7.1
Mainframe
VTAM1
11762