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CUCM 8.6.2 and ISDN GW 3241

Dear all,

I have CUCM 8.6.2 and ISDN GW 3241.

3 codecs: C60 and 2 x MX20 are registred to CUCM.

CUCM is registred with 3241 over H323.

Incomming and Outgoing Audio calls works ... but no Video.

From what I see on 3241 gw information problem is that CUCM don't send it's capabilities to GW (video):

Started at: 16:07

Call progress:


- IP call from "xxxxx2901" with IP x.x.x.x which called "xxxxxxx908", Connected to ISDN destination "xxxxxx908"

Participant details:

  • Unique index: 19
  • Name: "SOME NAME"
  • E.164: "xxxxx2901"
  • Call type: H.323 (IP - x.x.x.x)
  • FECC: Not established
  • Progress: connected
  • Negotiated received video bandwidth: 0.0 kbps
  • Measured received video bandwidth: 0.0 kbps

Participant details:

  • Unique index: 20
  • Name: "<unknown>"
  • E.164: "xxxxx908"
  • Call type: H.320 (ISDN)
  • FECC: Established
  • Progress: connected
  • Channel bonding map: 5 channels in use -  1 2 3 4 5
  • Channel rate: rx=64kbps;  tx=64kbps
  • Negotiated received video bandwidth: 1761.2 kbps
  • Measured received video bandwidth: 30.4 kbps

Where should I look for problem?

Many thanks,


2 Replies 2


Did you get a soution for the above scenario ?

I have a similar setup for a client with Call Manager 9.1 and i want to know wheter ISDN calling will work or not ?

Yes - received ISDN GW 3241 firmware that support SIP (previous was only supporting H323).

Now you can get this soft from cisco support page.

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