I have been using the guide at Peter's CCIE Musings and Rants (now in colour!): Cisco ISR G2 Video Conferencing Configuration to setup the video conferencing in our company. It's working in certain offices but not others. our Northern California office has a dedicated 2921 ISR with two PVDM DSP chips installed. End devices include two Cisco 8941 camera-phones and a 9971 camera phone in the same office. Calling any one of the three extensions from any of the other three allows video to be shared. Adding a third person to that call drops the codec down to G.711 or G.729. The 2921 is registered via SCCP with the CUCM (version 8.6). The output below illustrates the problem further.
When I initiate a call and conference in a third person we all just get black screens. The 2921 shows:
saccavgw01#sh sccp connections
sess_id conn_id stype mode codec sport rport ripaddr conn_id_tx
33563286 33610516 vcf sendrecv g729a 32586 16534 172.17.154.88
33563286 33610514 vcf sendrecv h264 30086 16894 172.19.4.109 33610515
33563286 33610513 vcf sendrecv g729a 21538 16892 172.19.4.109
33563286 33610510 vcf sendrecv g729a 30928 16546 172.19.4.152
Relevant DSP output:
saccavgw01#sh run | s dsp
voice-service dsp-reservation 33
dsp services dspfarm
dspfarm profile 1 conference video homogeneous
codec h264 cif frame-rate 30 bitrate 320kbps
maximum sessions 8
associate application SCCP
NAME: "CISCO2921/K9 chassis", DESCR: "CISCO2921/K9 chassis"
PID: CISCO2921/K9 , VID: V03 , SN: FTX1532AL9X
NAME: "PVDM3 DSP DIMM with 32 Channels on Slot 0 SubSlot 4", DESCR: "PVDM3 DSP DIMM with 32 Channels"
PID: PVDM3-32 , VID: V01 , SN: FOC1529797P
NAME: "PVDM3 DSP DIMM with 128 Channels on Slot 0 SubSlot 5", DESCR: "PVDM3 DSP DIMM with 128 Channels"
PID: PVDM3-128 , VID: V01 , SN: FOC15441ETR
NAME: "PVDM3 DSP DIMM with 128 Channels on Slot 0 SubSlot 6", DESCR: "PVDM3 DSP DIMM with 128 Channels"
PID: PVDM3-128 , VID: V01 , SN: FOC15441EU9
Any ideas on this one?