Agilent-JDSU J6810B STM-4/OC-12/STM-1o/OC3 Line Interface
Line Interface Module for use with J680X Series
General
The dual-rate LIM handles ATM, Packet over SONET/SDH and Frame Relay at 622 Mbps
and 155 Mbps, and performs ATM and WAN analysis on lower-rate submultiplexes/
tributaries down to fractional E1/DS1 rates.
When analyzing ATM at any supported rate, real-time AAL-2 and AAL-5 reassembly is
performed simultaneously on up to 5120 virtual channels and the resulting frames are
passed from the LIM to the acquisition system for further analysis. Cell mode is also
available. ATM Policing can be performed on up to 1024 virtual circuits in frame mode or
cell mode simultaneously with other measurements.
The functionality of this LIM can be enhanced with the addition of the J6828A Dual 4-
Port STM-1/OC-3 External LIM.
The LIM has dual-rate optical interfaces and can be used in single-mode or multi-mode
environments; when used in multi-mode environments, 10 dB attenuators should be used
on the optical outputs (a pair of suitable attenuators is supplied with the LIM).
Note: Both SDH and SONET framing are fully supported in this LIM; the SDH terminology
is given first (that is, SDH/SONET); SONET terminology has recently changed and the
newer terminology is used here with older terms shown in parentheses, where
appropriate.
Common to Inputs and Outputs:
Framing:
SDH: STM-4, STM-4c and STM-1, ITU-T G.707
SONET: STS-12, STS-12c, STS-3 and STS-3c, GR-253
SDH / SONET Frame Scrambling (x7 + x6 + 1)
ATM Cell Scrambling: conforms to ITU-T I.432.1 (x43 + 1) and may be turned on
(default) or off
