Individual NAP Statistics

Network Access Point (NAP) statistics provide per-trunk visibility into your voice traffic. MaaS auto-discovers all enabled NAPs and monitors each one individually.

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Supported NAP Types

MaaS monitors all NAP types:

NAP Type	Protocol	Notes
SIP	SIP over UDP/TCP/TLS	Includes registration monitoring
H248 RTP	H.248/MEGACO (IP media)	RTP port ranges
H248 TDM	H.248/MEGACO (TDM media)	Line services
ISUP	SS7 ISUP	CIC groups
ISDN	Q.931 ISDN	PRI/BRI stacks
CAS	Channel Associated Signaling	CAS stacks

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NAP Status

Statistic	Type	Description
Availability	Percentage	Percentage of available resources (0-100%)
State	Status	Overall NAP state (Up / Partially Up / Down)
Usage	Percentage	Current resource utilization
Congestion	Text	Congestion status indicator
Registration State	Text	SIP registration status (SIP NAPs only)

NAP State Values

Value	Meaning
Up (100%)	All resources available
Partially Up (1-99%)	Some resources unavailable
Down (0%)	No resources available

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Call Metrics

Current real-time call counts for each NAP:

Statistic	Units	Description
Total Call Legs	Call Legs	Total active call legs on this NAP
Incoming Call Legs	Call Legs	Current inbound call legs
Outgoing Call Legs	Call Legs	Current outbound call legs
Incoming MOS	MOS	Mean Opinion Score for inbound call quality
Outgoing MOS	MOS	Mean Opinion Score for outbound call quality

MOS (Mean Opinion Score) ranges from 1.0 (poor) to 5.0 (excellent). A score below 3.5 typically indicates noticeable voice quality degradation.

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Call Counters (Per Interval)

These counters show call activity since the last polling interval.

Call Attempts

Statistic	Direction	Description
Incoming Call Count	Incoming	Inbound call attempts
Outgoing Call Count	Outgoing	Outbound call attempts

Accepted Calls

Statistic	Direction	Description
Incoming Accepted	Incoming	Accepted inbound calls
Outgoing Accepted	Outgoing	Accepted outbound calls

Answered Calls

Statistic	Direction	Description
Incoming Answered	Incoming	Answered inbound calls
Outgoing Answered	Outgoing	Answered outbound calls

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CPS Metrics (Per NAP)

Calls per second calculated for each NAP:

Statistic	Direction	Description
Incoming CPS	Incoming	Inbound call rate
Outgoing CPS	Outgoing	Outbound call rate
Incoming Accepted CPS	Incoming	Accepted inbound rate
Outgoing Accepted CPS	Outgoing	Accepted outbound rate
Incoming Answered CPS	Incoming	Answered inbound rate
Outgoing Answered CPS	Outgoing	Answered outbound rate

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Drop Statistics

Call drops categorized by cause:

Statistic	Description
Local Drops	Calls dropped by the local system
Remote Drops	Calls dropped by the remote party
System Drops	Calls dropped due to system issues

Drop counters show the delta since the last interval and include a 10-minute heartbeat to reduce noise during idle periods.

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Calculated Statistics

MaaS calculates additional metrics for capacity planning:

Statistic	Description
Last Hour Max	Maximum concurrent calls in the past hour
Last Hour HWM	Rolling high water mark

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Alerts

High Severity

Alert	Condition	Description
NAP Registration Failed	Registration ≠ "Yes"	SIP trunk lost registration (SIP NAPs only)

Warning Severity

Alert	Condition	Description
NAP Down	Availability = 0%	NAP has no available resources
NAP Congestion	Congestion status detected	NAP is experiencing congestion

SIP Registration Monitoring: For SIP NAPs configured with outbound registration (register_to_proxy enabled), MaaS monitors the Registration State (Yes/No) and triggers a HIGH severity alert when registration fails. This is critical for detecting trunk failures with carriers that require registration.

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Understanding NAP Metrics

Call Legs vs Call Count

These two metric types measure different things:

• Call Legs (e.g. Incoming Call Legs, Total Call Legs): A real-time snapshot of active call legs right now. This value goes up when calls connect and down when calls end.

• Call Count (e.g. Incoming Call Count, Outgoing Call Count): A cumulative counter that increments with every call attempt. MaaS displays this as the delta per polling interval, showing how many new calls occurred since the last collection.

Example: If you have 50 active calls and 200 new call attempts in the last minute, Call Legs = 50 and Call Count (delta) = 200.

Availability vs Usage

• Availability: What percentage of resources can be used (health indicator)

• Usage: What percentage of resources are being used (load indicator)

A NAP can have 100% availability but low usage (healthy, light traffic) or high usage with declining availability (approaching capacity limits).

Drop Analysis

Comparing drop types helps identify issues:

• High Local Drops: May indicate configuration issues or resource exhaustion

• High Remote Drops: May indicate far-end issues or network problems

• High System Drops: May indicate system resource issues

Per-NAP CPS

Monitoring CPS per NAP helps identify:

• Which trunks are handling the most traffic

• Load imbalances between NAPs

• Traffic patterns for specific carriers or routes