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.


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.


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


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


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


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


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


SS7/M2UA Signaling Statistics

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

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


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.


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

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