Watson Ethernet
Operating Manual
Watson-Ethernet-Manual.doc
Version 3.3-01
3.3.3 Mixed mode operation
The Watson Ethernet tabletop modems are interoperable with other Watson
TDM modems:
Figure 3-14: Mixed mode operation
One pair and two pair links are supported in mixed mode operation. The maxi-
mum throughput is 2.048 Mbps (32 timeslots) in E1 mixed mode operation and
9.9 Mbps (156 timeslots) in nx64 mixed mode operation. In mixed mode opera-
tion the Watson Ethernet tabletop modems can be remotely powered from the
E1 or nx64 plug-ins. The Watson Regenerator is supported.
3.3.4 Cisco HDLC
The Watson Ethernet tabletop modems support "Cisco HDLC" formatting de-
scribed in RFC 1547 with 16-bit FCS and bit-stuffed framing. Use Cisco HDLC in
mixed mode operation (Figure 3-14) to directly connect the remote end of the link
to the WAN port of a router.
Figure 3-15: Cisco HDLC
The Cisco HDLC formatting is controlled with the HDLCTAG Monitor command.
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