|
|
H.323
|
SIP
|
H.248(Megaco)/MGCP
|
|
Hype
|
None
|
High
|
None
|
|
Philosophy
|
Unified
|
Modular
|
Unified
|
|
Complexity
|
High
|
High
|
Moderate
|
|
Scope
|
Full
|
Limited
|
Partial
|
|
Scalability
|
Good
|
Good
|
N.A. (it's a tool for scalability)
|
|
PSTN Interworking
|
Yes
|
Somewhat
|
Yes
|
|
SS7 Compatibility
|
Good
|
Poor
|
Good
|
|
Cost
|
Moderate
|
Moderate
|
Moderate
|
|
Message Size
|
Small
|
Large
|
Moderate
|
|
Router Fragmentation
|
Unlikely
|
Likely
|
Unlikely
|
|
Volatility of Standard
|
Low
|
High
|
Low
|
|
Multimedia
|
Good
|
Poor
|
Poor
|
|
Usage-Billing Fit
|
Good
|
Poor
|
N.A.
|
|
Monthly Billable Call Minutes
|
1,000,000,000's
|
10,000s
|
100,000s
|
|
