General TCP/IP protocol information

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This topic provides general TCP/IP protocol information for each of the messaging protocols supported.

The following table provides general TCP/IP protocol information.

TCP/IP protocol	AUDIX Digital	Aria Digital	Serenade Digital	VPIM v2	SMTP/MIME
Encoding Algorithm	Code-Excited Linear Programming (CELP)	Sub-Band Coding (SBC)	Continuously Variable Sloped Delta Modulation (CVSD)	Adaptive Digital Pulse Code Modulation (ADPCM)	Global Specification for Mobile Communication (GSM) Or G.711 mu-law Or G.711 A-law
Average Bytes per Second	2K	3K	3K	4K	GSM=1.7K G.711=8K
Average Voice MessageLength (60 seconds) including overhead	135K bytes	250K bytes	250K bytes	330K bytes	GSM=140K bytes G.711=660K bytes
Average Fax Message Length (3 pages) including overhead	230K bytes	450K bytes	450K bytes	350K bytes	350K bytes
Average Subscriber Update Length(From/To this type of system, assuming a 3 second voice name)	6K bytes	9K bytes	9K bytes	12K bytes	LDAP-based: 24K bytes
TCP/IP Ports Used	5500	4000	22136	25	25 (MM LDAP-based uses 55389) (Message Networking LDAP-based uses 56389)