Cisco Systems UC540WFXOK9 manual The above examples indicate Sessions x participant

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
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