I have an interesting issue with E&M type 5, 4 Wire, Immediate Start,
signalling.
NEC 7660 PABX connect 4 E&M Ports to 3662 router with NM-2V with 2 E&M
Cards.
E&M signalling not reliable.
If I replace 3662 with MC3810 with 4 E&M Interfaces all works well
If I replace 3662 with 1750-4V with 2 E&M Cards all works well
If I replace 3662 with 2621 with NM-2V with 2 E&M cards performs like 3662.
When I say not reliable router will only answer a call in E&M 50% of the
time and require E&M to be hung up for 5 Seconds before another call attempt
can be made.
Seen this type of response ?
Running 12.1(5)T
Charles
CCNP-Voice,CCDP,MCSE+I
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