Specifications

5-40
Reference Guide
Model No.
Running Head
IP Packet Routing CPU Card
FORMAT
The format indicates which format is selected for the given nX64 communications port.
Possible options are HDLC, Frame Relay and Ethernet. Ethernet is only allowed for
communications port1. Default setting is HDLC.
RATE
The Rate setting allows you to adjust the speed of the circuit according to the application
requirements. The only speed available for ports C1 to C4 is
64k
(64 kbps). However, ports 1
to 64 can be set to either
56k
or
64k
.
MTU
The MTU (Maximum Transmission Unit) determines the largest possible number of bytes a
datagram can have on the given medium. The range is between 128 to 1500 bytes. When
communicating with the MCC, the MTU must be set to
240
when using a single time slot,
otherwise the MTU must be set to
1500
.