no resume key after hold

[lorenz84gDD]

Hello all,

I've a strange problem with UCM SB 8.0.3.22900-5 installation.

Users complain that 90% of the times they put calls on hold aren't able to resume the call back since the Resume button isn't available. This isn't my first voip installation so I think that this UCM release has problems as the 8.0.2 used.

This is the scenario:

GW H323 (E1 PRI LINK) <--> UCM <--> PHONE

Do you have any suggestion? Did you ever encounter the problem?

many thanks for your attention

Lorenz

[Jaime Valencia · Accepted solution]

Have you tried checking the MTP required on the GW config?

HTH

java

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[lorenz84gDD]

Yes now it works. But why?