TDM Adapter Statistics

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

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Hardware Adapters

MaaS auto-discovers 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

Adapter Alerts

Alert	Severity	Condition
Hardware Unit Down	HIGH	Status = 0

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

E1/T1 Alerts

Alert	Severity	Condition
Line Bouncing	WARNING	>4 state changes in 1 hour
State Change	INFO	Any state change detected

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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)

M2UA Alerts

Alert	Severity	Condition
M2UA Peer Down	HIGH	Peer State = 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 discovered when the firewall is enabled on a host.

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TDM Troubleshooting

1

Line Bouncing

Frequent state changes on TDM spans typically indicate:

• Physical layer issues (cabling, cross-connects)

• Timing/clocking problems

• 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

• 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

• Configuration problems