Specifications

MGX 8220 Service Modules 4-5
Frame Service Module
Figure4-4 Example FRSM Front Cards
Fractional FRSMs support one 56 kbps or one Nx64 kbps customer port (FR-UNI, FR-NNI,
ATM-FUNI, and Frame Forwarding) per T1/E1 line. Channelized FRSMs support multiple 56 kbps
or Nx64 kbps customer ports per T1/E1 line, up to the physical line’s bandwidth limitations.
The 4-port FRSM supports up to a maximum of 256 connections (virtual circuits) which can be
allocated across the 4 or 8 T1 or E1 lines in any manner. The 8-port FRSM supports a maximum of
1,000 connections. The maximum frame size is 4510 bytes for frame relay and 4096 for ATM-FUNI.