This information is provided as is with no warranty. If you burn your kitchen sink don’t blame me.
This tells the tale of our CEoIP-tests.
Cisco Router (2600XM or bigger, needs 128 MB RAM)
Cisco Network Module NM-CEM-4SER or NM-CEM-4TE1
IOS 12.3(7)T, one of the following Featuresets:
Advanced Enterprise Services
Advanced IP Services
128 MB RAM for your Router
Legacy Client (X.21) — Router0 —WAN— Router1 — Legacy Client (X.21)
Cisco Config (only Router0 shown, Router1 should be obvious)
boring things cutted out…
clock rate 256000
clock mode normal
xconnect [Router1 IP] 0 encapsulation udp
local ip address [Router0 IP]
local udp port 15901
remote udp port 15902
These links were helpful:
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