Programming instructions

105
Upgrades and FRUs
DSP Module
You may have to add additional DSP modules to:
• increase the number of voice mail ports
• add compression channels
- LX/MXe expanded/700-user: up to 64
- MX/MXe base/100-user: up to 32
- CX/CXi: up to 16
• increase telephony resources to support more TDM devices.
This section contains DSP tables for:
• “Calculating DSP Usage (MXe)” on page 105
• “Calculating DSP Usage (LX/MX)” on page 105
• “Calculating DSP Usage (CX/CXi)” on page 108.
Calculating DSP Usage (MXe)
The embedded DSP resources on the MXe are sufficient to support
telephony services, conferencing and voice mail. Additional DSPs are
required to support G.729a compression.
Calculating DSP Usage (LX/MX)
Enter your system parameters in Table 6 (see Table 5 for MXe, Table 7 on
page 108
for CX/CXi), to determine the number of Quad DSP modules
required. Other features in a system which can affect the DSP usage are
ACD, external applications, and heavy or light traffic.
Tip: Refer to Table 7 on page 108 to calculate DSP requirements for the CX
and CXi controllers. You may replace two Dual DSPs with one Quad DSP.
Table 5: MXe DSP Requirements Example
MXe configuration Embedded DSP Quad DSP MMC
Standard MXe √ —
MXe with 32 channels G.729a √ 1
MXe with second processor and 64
channels G.729a
√ 2