Switch Considerations
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Overview
This section discusses switch-level considerations that must be
observed when engineering the SIP for Packet Trunking feature.
The following call models are used to determine the capacity
requirements.
Configuration Model Traffic Distribution
IP OIU-Packet SIP Tandem
(IOST)
• ISUP trunk calls -> ISUP
trunk calls (33%)
• ISUP trunk calls -> SIP calls
(33.5%)
• SIP calls -> ISUP trunk calls
(33.5%)
IP OIU-Packet SIP EQPOTS
(IOSE)
• analog line calls -> analog
line calls (20%)
• analog line calls -> ISUP
trunk calls (13%)
• analog line calls -> SIP calls
(27%)
• ISUP trunk calls -> analog
line calls (13%)
• SIP calls -> analog line calls
(27%)
PSTN Gateway Local/Toll
(PSTNGW-LT)
• analog line calls -> analog
line calls (20%)
• analog line calls -> SIP trunk
calls (25%)
• SIP trunk calls -> analog line
calls (25%)
• ISUP trunk calls -> IP end
point calls (5%)
• IP end point calls -> ISUP
trunk calls (5%)
• SIP trunk calls -> ISUP trunk
calls (10%)
• ISUP trunk calls -> SIP trunk
calls (10%)
Engineering Considerations
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4-2
Lucent Technologies 235-200-118
Issue 3.02B, March 2007
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