Conferencing DSP Resources
Conferences
Hardware All Participants One or More
Module Use G.711 Participants Use
or Chassis DSP Configuration (a-law, mu-law) G.729 or G.729a
NM-HDV2 1 to 4 of: Conferences/PVDM2: Conferences/PVDM2:
(8 participants PVDM2-8 (1/2 DSP) 4 1
per conference) PVDM2-16 (1 DSP) 8 2
PVDM2-32 (2 DSPs) 16 4
PVDM2-48 (3 DSPs) 24 6
PVDM2-64 (4 DSPs) 32 8
Maximum of 50
conferences per NM
NM-HD-1V Fixed at 1 DSP 8 conferences per NM 2 conferences per NM
(8 participants
per conference)
NM-HD-2V Fixed at 1 DSP 8 conferences per NM 2 conferences per NM
(8 participants
per conference)
NM-HD-2VE Fixed at 3 DSPs 24 conferences per NM 6 conferences per NM
(8 participants
per conference)
continues
NM-HDV 1 to 5 of PVDM-12 3, 6, 9, 12, or 15 3, 6, 9, 12, or 15
conferences per NM conferences per NM
NM-HDV-FARM (3 DSPs per
(6 participants PVDM-12)
per conference)
1751 1 to 2 of: 1 conference per DSP 1 conference per DSP
(6 participants PVDM-256K-4 Maximum of 5 Maximum of 5
per conference) (1 DSP) conferences per chassis conferences per chassis
PVDM-256K-8
(2 DSPs)
PVDM-256K-12
(3 DSPs)
PVDM-256K-16HD
(4 DSPs)
PVDM-256K-20HD
(5 DSPs)
1760 1 to 2 of: 1 conference per DSP 1 conference per DSP
(6 participants PVDM-256K-4 Maximum of 20 Maximum of 20
per conference) (1 DSP) conferences per chassis conferences per chassis
PVDM-256K-8
(2 DSPs)
PVDM-256K-12
(3 DSPs)
PVDM-256K-16HD
(4 DSPs)
PVDM-256K-20HD
(5 DSPs)
WS-6608-T1 Fixed at 64 of C549 32 participants per port 32 participants per port
and WS-6608-E1
(3 to 32 partici- (8 DSPs per port) G.729a and G.711 only
pants per conference)
WS-SVC-CMM- Fixed at 4 of 128 conferences 128 conferences per
ACT | (64 partici- Broadcom 1500 per module module
pants per conference)
The number of required DSPs for transcoding depends on the DSP type used and the
codecs that need to be transcoded. C549 support up to four transcoding sessions for any
codec combination. The C5510 supports 16 G.711 sessions; eight G.729a, ab, and GSMFR
sessions; and six G729, G729b, and GSM-E FR sessions.
Table 2-11 shows the various DSP resources that can be used for transcoding and their
performance.