TDM & Hardware Statistics

This section covers monitoring for physical hardware adapters, TDM interfaces, H.248 gateways, SS7/M2UA signaling, and firewall statistics. These metrics are relevant for deployments with media gateway cards and TDM connectivity.

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Hardware Adapters

MaaS monitors all hardware units (media gateway cards) in your TMedia system.

Adapter Metrics

Statistic	Type	Description
Status	Binary	Up (1) or Down (0)
HA State	Text	High availability operational state
CPU 0 Usage	%	Core 0 utilization
CPU 1 Usage	%	Core 1 utilization

N+1 Backup Support

MaaS tracks adapter replacements for N+1 backup scenarios, maintaining the relationship between replaced and replacement units.

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TDM Interface Types

MaaS monitors three categories of TDM interfaces:

Interface Type	Description
E1/T1/J1	Standard telephony spans
DS3	High-capacity digital signal level 3
OC3/STM-1	SONET/SDH optical interfaces

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E1/T1/J1 Statistics

Line State

Statistic	Type	Description
State	Text	Line operational state

Call Statistics (Per Span)

Statistic	Units	Description
Accepted	Calls	Successfully accepted calls
Answered	Calls	Connected calls
Alerted	Calls	Calls in alerting state
In Progress	Calls	Calls being set up
Terminating	Calls	Calls being torn down
Media Only	Calls	Media-only (no signaling) calls
Idle	Timeslots	Available timeslots

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DS3 Statistics

Interface State

Statistic	Type	Description
State	Text	Interface operational state

Call Statistics

Same metrics as E1/T1:

• Accepted, Answered, Alerted, In Progress, Terminating, Media Only, Idle

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OC3/STM-1 Statistics

Interface State

Statistic	Type	Description
State	Text	Primary interface state
APS State	Text	Automatic Protection Switching state

Call Statistics

Same metrics as E1/T1:

• Accepted, Answered, Alerted, In Progress, Terminating, Media Only, Idle

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H.248/MEGACO Gateway Statistics

For systems with H.248 gateway functionality, MaaS monitors the gateway stack and MGC connections.

H.248 Metrics

Statistic	Type	Description
Congestion	Text	Gateway congestion status
Fixed Term In-Service	Count	In-service fixed terminations
Fixed Term OOS	Count	Out-of-service fixed terminations
Media Only Calls	Calls	Media-only call count

MGC Status

MaaS monitors up to 4 Media Gateway Controllers:

Statistic	Description
MGC1 State	Primary MGC connection state
MGC2 State	Secondary MGC state
MGC3 State	Tertiary MGC state
MGC4 State	Quaternary MGC state

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SS7/M2UA Signaling Statistics

For systems with SS7 signaling via M2UA, MaaS provides hierarchical monitoring:

Adapter
  └── M2UA SAP (Service Access Point)
        └── M2UA Cluster
              ├── M2UA Links
              └── M2UA Peers

M2UA Link Statistics

Statistic	Type	Description
M2UA Link State	Binary	Link up (1) or down (0)
MTP2 Link State	Binary	Underlying MTP2 link state

M2UA Peer Statistics

Statistic	Type	Description
Peer State	Binary	Peer active (1) or inactive (0)

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Firewall Statistics

When TBRouter firewall is enabled on a host, additional metrics are available:

Statistic	Description
DDoS Alarm	DDoS detection status
High CPU	Firewall CPU alarm
List Full	Connection list capacity
Reboot Required	Firewall reboot pending
Scheduling Problem	Firewall scheduling issues
Threshold Alarm	Threshold exceeded indicator

Firewall statistics are automatically available when the firewall is enabled on a host.

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Alerts

High Severity

Alert	Condition	Description
Hardware Unit Down	Status = 0	Physical media gateway card offline
M2UA Peer Down	Peer State = 0	SS7 signaling peer connection lost

Average Severity

Alert	Condition	Description
TDM Line Bouncing	>4 state changes in 1 hour	TDM span is experiencing frequent state changes
Firewall DDoS Alarm	DDoS alarm triggered	Firewall has detected a potential DDoS attack
Firewall Scheduling Problem	Scheduling issues detected	Firewall has scheduling problems

Information Severity

Alert	Condition	Description
TDM State Change	Any state change	TDM line state changed

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Troubleshooting

1

Line Bouncing

Frequent state changes on TDM spans typically indicate physical layer issues (cabling, cross-connects), timing/clocking problems, or far-end equipment issues. The "Line Bouncing" alert triggers when a span changes state more than 4 times in an hour.

2

Idle Timeslot Monitoring

Monitoring idle timeslots helps identify capacity utilization per span, uneven load distribution across spans, and potential misconfiguration (timeslots never used).

3

Fixed Termination Health

For H.248 gateways, comparing in-service vs out-of-service fixed terminations indicates overall gateway health, TDM span issues affecting terminations, and configuration problems.