Feature

Support for T1/E1 voice/WAN interface card (VWIC)

Transcoding (g711 to g729)

Conferencing**

DSP Resource Utilization

24channels*

2channels

16channels

*Total DSP resources will depend upon the number of channels provisioned in the T1.

**Conferencing always uses up an entire DSP. The rest of the features can share a DSP. The number of sessions available will vary depending upon the codec used in a conference call.

Tables 9 and 10 list maximum sessions for either ad hoc conferencing or meet-me conferencing. DSP resources allocated for conferencing can be shared by both features, and a mix of these can be configured. Below are a few examples based on Table 9. The concept of sharing conferencing resources applies to Table 10 as well.

Ad hoc 24x8

Meet-me 0x0

Ad hoc

12x8

Meet-me

12x8

Ad hoc

24x4

Meet-me

6x16

The above examples indicate Sessions x participant.

The Transcoding column lists the maximum transcoding sessions that the system can be configured for, for a given configuration of DSP. For example, the first row in Table 9 indicates that a maximum of three transcoding sessions are available if three DSPs are allocated for conferencing.

If more transcoding sessions are required, DSP resources will need to be diverted from conferencing to transcoding. For example, in the second row of Table 9, one of the DSPs is dedicated to transcoding, leaving two DSPs for conferencing. Notice the increase in the number of transcoding sessions and the drop in the number of conferencing sessions.

 

Table 9.

DSP Resources: Scenario 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

UC 500

Additional

SIP Trunk

Ad-hoc

Meet-me

Comments

Transcoding

 

 

Model

Voice

Preferred

Conference

Conference

 

 

 

 

 

Card (VIC)

Codec

(Sessions x

(Sessions x

 

 

 

 

 

 

 

Participants)

Participants)

 

 

 

 

UC 540

None

No SIP Trunk

Up to a

Up to a

1 DSP for supporting voice ports and

A maximum of 3

 

 

 

 

or G.711

maximum of

maximum of

Transcoding sessions

Transcoding sessions

 

 

 

 

 

24x8 or 48x4

24x8 or 12x16

Remaining 3 DSPs used for Conferencing

for this configuration

 

 

 

 

 

 

or 6x32

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

G.729

Up to a

Up to a

1 DSP for supporting voice ports and

A maximum of 11

 

 

 

 

 

maximum of

maximum of

Transcoding sessions

Transcoding sessions

 

 

 

 

Transcoding

 

 

 

4x8 or 8x4

4x8 or 2x16 or

 

for this configuration

 

 

 

 

sessions

1 DSP reserved for transcoding

 

 

 

 

 

1x32

 

 

 

 

 

recommended

 

 

 

 

 

 

 

 

Remaining 2 DSPs used for Conferencing

 

 

 

 

 

 

 

 

 

 

 

2FXS

No SIP Trunk

Up to a

Up to a

1 DSP for supporting voice ports and

A maximum of 2

 

 

 

2FXS/DID

or G.711

maximum of

maximum of

Transcoding sessions

Transcoding sessions

 

 

 

 

24x8 or 48x4

24x8 or 12x16

 

for this configuration

 

 

 

 

 

Remaining 3 DSPs used for Conferencing

 

 

 

2FXO

 

 

 

 

 

or 6x32

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

G.729

Up to a

Up to a

1 DSP for supporting voice ports and

A maximum of 10

 

 

 

 

 

maximum of

maximum of

Transcoding sessions

Transcoding sessions

 

 

 

 

Transcoding

 

 

 

4x8 or 8x4

4x8 or 2x16 or

 

for this configuration

 

 

 

 

sessions

1 DSP reserved for transcoding

 

 

 

 

 

1x32

 

 

 

 

 

recommended

 

 

 

 

 

 

 

 

Remaining 2 DSPs used for Conferencing

 

 

 

 

 

 

 

 

 

 

 

4FXS

No SIP Trunk

Up to a

Up to a

1 DSP for supporting voice ports and

A maximum of 1

 

 

 

4FXS/DID

or G.711

maximum of

maximum of

Transcoding sessions

Transcoding sessions

 

 

 

 

24x8 or 48x4

24x8 or 12x16

 

for this configuration

 

 

 

4FXO

 

Remaining 3 DSPs used for Conferencing

 

 

 

 

 

or 6x32

 

 

 

 

 

 

 

 

 

 

 

 

 

2BRI

 

 

 

 

 

 

 

 

G.729

Up to a

Up to a

1 DSP for supporting voice ports and

A maximum of 9

 

 

 

NT/TE

 

 

 

 

maximum of

maximum of

Transcoding sessions

Transcoding sessions

 

 

 

 

Transcoding

 

 

 

 

4x8 or 8x4

4x8 or 2x16 or

 

for this configuration

 

 

 

 

sessions

1 DSP reserved for transcoding

 

 

 

 

recommended

 

1x32

Remaining 2 DSPs used for Conferencing

 

 

 

 

 

 

 

 

 

© 2011 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.

 

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Cisco Systems UC540WFXOK9 manual DSP Resources Scenario

UC540WFXOK9 specifications

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