Troubleshooting guide

295
Installation Planner
CX II/CXi II Configurations - DSP Resources
The following tables list the DSP resources available on the CX(i) II with
and without a DSP II module installed.
Notes:
1 The number of conference, voice mail, and compression resources is fixed by
the purchased option and the number of DSP devices available; the other
values are adjustable. Compression alters the number of resources available
for the system. For example, by adding 8 compression resources to a system
with 4 DSPs total, the maximum number of three-party conferences drops to
3 and the maximum number of voice mail ports drops to 4.
2. The controller supports the G.711 and G.729a audio codecs.’
- The G.711 PCM audio codec for 56/64 kbps generally provides the best
voice quality and is comparable to TDM-type connections.
- The G.729a audio codec for 8/13 kbps provides a good reduction in
bandwidth with only minor loss in voice quality.
- A purchasable option controls the number of G.729a codecs available to
IP devices in the system. Compression enables more devices to share the
available bandwidth. The option is purchasable in multiples of 8 to a
maximum of 16. The default value is 0.
CX II/CXi II DSP Configurations without DSP II
Configuration
# of DSPs Echo Canceller G729 Conf E2T T.38 DTMF Receivers Voice Mail
Base System 2 32 0 10x3 64 0 64+ 16
Base + one
T1/E1 Combo
3 64 0 10x3 64 0 64+ 16
Base + two
T1/E1 Combo
4 96 0 10x3 64 0 64+ 16
Note:The number of voice mail and conference channels is fixed at 16 and 30
respectively.
Table 59: CX/CXi DSP Configurations without DSP II (continued)
Configuration
# of DSPs Echo Canceller G729 Conf E2T T.38 DTMF Receivers Voice Mail
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