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CUCM and CME 2951 as H.323 Gateway. Hold Transfer Conference dont work

I have CUCM 8.0.3 and CME 9.1 on Cisco 2951 ISR.

I've added 2951 as H.323 Gateway to CUCM.

Calls, routing, dial-pears etc are fine.

Problem is:

I can't put on hold or tranfer of create a conference for a call between CME and CUCM.

I've cheked same operations between phones registered to CME - they work.

Explaine me pleaze why does it happen? What have I missed?

8 REPLIES
VIP Super Bronze

CUCM and CME 2951 as H.323 Gateway. Hold Transfer Conference don

The CME SRND has an entire chapter on this sort of mess which you can avoid by using SIP instead of H.323. The problem comes down to differences in how CUCM and CME perform transfer and conference operations with H.323. If you're determined for this to happen over H.323 we'll need to know the CME configuration as well as the exact call scenario you're trying. Walk us through it step-by-step.

Please remember to rate helpful responses and identify helpful or correct answers.

Please remember to rate helpful responses and identify helpful or

CUCM and CME 2951 as H.323 Gateway. Hold Transfer Conference don

Now I'll try to walk you as you asked.

Phones registered on CME.

Here is config:

voice service voip

.....

telephony-service

max-ephones 165

max-dn 300

ip source-address 10.38.255.255 port 2000

user-locale RU

network-locale RU

load 6921 SCCP69xx.9-2-4-3.loads

load 8941 SCCP8941_8945.9-3-2-11

time-format 24

date-format dd-mm-yy

max-conferences 8 gain -6

transfer-system full-consult

transfer-pattern T

.....

ephone-dn  200

number 1600

name Alexey Martyschenko

ephone  200

device-security-mode none

mac-address E05F.B9C4.6759

button  1:200

ephone-200[199] Mac:E05F.B9C4.6759 TCP socket:[33] activeLine:0 whisperLine:0 REGISTERED in SCCP ver 15/12 max_streams=1

mediaActive:0 whisper_mediaActive:0 startMedia:0 offhook:0 ringing:0 reset:0 reset_sent:0 paging 0 debug:0 caps:8

IP:10.20.8.18 * 35892 6921  keepalive 236 max_line 2 available_line 2

button 1: cw:1 ccw:(0)

dn 200 number 1600 CH1   IDLE

Preferred Codec: g711ulaw

Lpcor Type: none

Re: CUCM and CME 2951 as H.323 Gateway. Hold Transfer Conference

CME connects to HQ CUCM 8.0 via DMVPN channels from this interface

interface GigabitEthernet0/2.300

description -= WAN HQ =-

encapsulation dot1Q 300

ip address 10.38.0.50 255.255.255.248

ip ospf priority 255

h323-gateway voip interface

h323-gateway voip bind srcaddr 10.38.0.50

Here is dialpeer

dial-peer voice 101 voip

description -= Ent Telephony | HQ CUCM1 =-

destination-pattern 8......

session target ipv4:10.20.8.5

dtmf-relay h245-alphanumeric

On the side of CUCM H.323 is added

Re: CUCM and CME 2951 as H.323 Gateway. Hold Transfer Conference

Kiev_DP has

CMGroup2 has CallManagers:

1. CM_10.20.8.5

2. CM_10.20.8.6

dpg_cme_CSS leads to Dneprog_PT

There are Translations in Dneprogor_PT:

8xxxxxx is adding 8+officecode to Calling party (Output for my phone will be 8561600) and keep searching in Interoffice_PT.

Translations in Inteoffice_PT:

8xxxx

In these translations 8+officecode is removed from Called party and sent to corresponding PT.

VIP Super Bronze

CUCM and CME 2951 as H.323 Gateway. Hold Transfer Conference don

The first place to start is to disable h450.2 and h450.3 on your CCME because as Jonathan pointed out, CCM and CCME perform transfer using seperate methods. CCME uses h450.2 while cucm doesnt support this.

conf t

voice service voip

supplementary-service h450.12

When you enable h450.12, it automatically disables h450.2 and .3 and only enabled them when the far end endpoint supports them..

Try that and let us know

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CUCM and CME 2951 as H.323 Gateway. Hold Transfer Conference don

Sorry for pause after your replies. I'm in business trip.

Now I've tried to do what you recommended.

voice service voip

allow-connections h323 to h323

allow-connections h323 to sip

allow-connections sip to h323

allow-connections sip to sip

supplementary-service h450.12

fax protocol t38 version 0 ls-redundancy 0 hs-redundancy 0 fallback none

It's pity but no result. Transfer,hold buttons don't work.

I understood that the problem could be in H.450.x protocol, but I don't know how to use it.

CUCM and CME 2951 as H.323 Gateway. Hold Transfer Conference don

I've decided to do it via sip

This is usual dialpeer:

dial-peer voice 101 voip

description -= Ent Telephony | HQ CUCM1 =-

destination-pattern 8......

session target ipv4:10.20.8.5

dtmf-relay h245-alphanumeric

I've added dialpeer exclusive for my number and make it via sip:

dial-peer voice 8441100 voip

destination-pattern 8441100

session protocol sipv2

session target ipv4:10.20.8.5

And via sip it works.

New Member

You need to configure MTP

You need to configure MTP because H.323 does not support Hold/Transfer and that's where you need MTP resources to support.

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