Session-ID

1

An arbitrary index number for the session in the session table

Session-ID: 35

Status

2

The status of the session. Possible values:

• Active. The session is still open.

• Terminated. The session is finished.

Status: Terminated

QOS

3

The QoS status of the session. Possible values:

• OK. There are no QoS problems in the session.

• Faulted. There are QoS problems in the session.

QOS: Faulted

EngineId

4

The ID of the VoIP engine. The Branch Gateway has one VoIP engine.

EngineId: 0

Start-Time

5

The date of the RTP session

2015-08-23

6

The start time of the RTP session

Start-Time: 2015-08-23,11:09:07

End-Time

7

The end time of the RTP session

End-Time: 2015-08-23,11:13:40

Duration

8

The duration of the RTP session

Duration: 00:04:33

CName

9

format: gwt@<MGP-address>

CName: gwp@135.8.118.252

Phone

10

The local extension number and conference ID in format <conference ID>:<extension number>.

Conference calls can involve more than one entry in the session table. Multiple sessions belonging to the same conference call can usually be identified by a common conference ID.

Notes:

• Phone data is received from CM only if VMON is configured.

• If you are not running VMON, you can cause CM to send the phone data by configuring a dummy RTCP-server for the region, with a 'localhost' IP address (127.x.x.x).

Phone: 69:2011

Local-Address

11

The PMI. The number after the colon is the UDP port number.

Local-Address: 135.8.118.252:2061

Remote-Address

13

The remote VoIP engine, gateway PMI, or IP phone address. The number after the colon is the UDP port number.

Remote-Address: 135.8.76.107:2061

12, 14

SSRC ID. The number in parentheses is the number of observed SSRC changes during the session.

SSRC 2989801899 (0)

Samples

15

The number of times the application has sampled the VoIP engine (RTP receiver) statistics.

Samples: 54¹⁵ (5 sec)

16

The sampling interval

Samples: 54 (5 sec)¹⁶

Codec:

17

The codec used for the session

G723

18

The RTP packet size, in bytes

62B

19

The RTP packet interval, in ms

30mS

20

The encryption method

Off

Silence suppression (Tx/Rx)

21

The received silence suppression method

Silence-suppression(Tx/Rx) Disabled²¹/Not-Supported

22

The transmitted silence suppression method

Silence-suppression(Tx/Rx) Disabled/Not-Supported²²

Play-Time

23

The overall time the codec played valid received frames

Play-Time 272.610sec

Codec

Loss codec-loss%

24

The last value of codec loss sampled. Codec loss is the percentage of time the codec played fill frames due to lack of valid RTP frames. Possible causes include jitter and packet loss.

Loss 0.0%²⁴ #1

#codec-loss-events

25

The codec loss event counter

Loss 0.0% #1²⁵

Avg-Loss

26

The average of all codec loss values sampled during the session

Avg-Loss 0.1%

RTT rtt ms

27

The last sampling of codec round trip time (RTT), in ms. Codec RTT is the round-trip delay experienced by the user, including internal delay. This value is not entirely accurate since remote internal delays are not always known.

RTT 741mS²⁷ #38

#rtt-events

28

The codec RTT event counter

RTT 741mS #38²⁸

Avg-RTT

29

The average of all codec RTT values sampled during the session

Avg-RTT 570mS

Jbuf-under/ overruns

30

The estimated percentage contribution of jitter-buffer underruns to the average codec loss

JBuf-under/overruns 0.1%³⁰/0.0%

31

The estimated percentage contribution of jitter-buffer overruns to the average codec loss

JBuf-under/overruns 0.1%/0.0%³¹

Jbuf-delay

32

The last jitter buffer delay

Jbuf-Delay 22mS

Max-Jbuf-Delay

33

The maximum jitter buffer delay during the session

Max-Jbuf-Delay 60mS

Received RTP:

Packets

34

The total number of received packets

Packets 9236

Loss

loss%

35

The last sampled value of network RTP packet loss

Loss 0.0%³⁵ #0

#loss-events

36

The network RTP packet loss event counter

Loss 0.0% #0³⁶

Avg-loss

37

The average of all network RTP packet loss values during the session

Avg-Loss 0.0%

RTT rtt ms

38

The network RTT. The RTT is calculated upon RTCP packet reception.

RTT 604mS³⁸ #38

#rtt-events

39

The network RTT event counter

RTT 604mS #38³⁹

Avg-RTT

40

The average of all network RTT values during the session

Avg-RTT 376mS

Jitter

jitter ms

41

The network jitter at the RTP receiver.

Combined with long RTT, a large jitter value may indicate WAN congestion.

Jitter 0mS⁴¹ #0

#jitter-event

42

The RTP receiver network jitter event counter

Jitter 0mS #0⁴²

Avg-Jitter

43

The average of all network jitter values during the session

Avg-Jitter 0mS

TTL (last/min/max)

44

The last value of TTL, minimum value of TTL, and maximum value of TTL sampled during the session. TTL changes during a session may indicate route flaps in the IP network.

TTL(last/min/max) 63/63/63

Duplicates

45

This counter increments each time two consecutive RTP packets with the sample RTP sequence number are received. A large number of duplicates may indicate problems in the Layer 2/Ethernet topology (for example, loops).

Duplicates 0

Seq-Fall

46

This counter increments each time an RTP packet with a sequence number less than the last known sequence is received. Packet resequencing may be caused by switching to a backup WAN interface or route flaps.

Seq-Fall 0

DSCP

47

The last received DSCP value of the RTP packets

DSCP 46

L2Pri

48

The last received Layer 2 priority value of an RTP packet (usually IEEE802.1p)

L2Pri 12

RTCP

49

The total number of received RTCP packets

RTCP 54

Transmitted-RTP:

VLAN

50

The VLAN-ID on which the RTP packets are transmitted

VLAN 1

DSCP

51

The DSCP of RTP packets

DSCP 184

L2Pri

52

The Layer 2 priority of transmitted RTP packets (usually 802.1p)

L2Pri 6

RTCP

53

The total number of transmitted RTCP packets

RTCP 62

Remote-Statistics:

(Remote-Statistics items are calculated and evaluated upon reception of RTCP messages)

Loss

rem-loss%

54

The network loss experienced by the remote RTP receiver. The local RTP receiver learns about its remote peer statistics from RTCP packets.

Loss 0.0%⁵⁴ #0

#rem-loss-ev

55

The number of samples that were over the rem-loss threshold

Loss 0.0% #0⁵⁵

Avg-Loss

56

The average network loss experienced by the remote RTP receiver

Avg-Loss 0.0%

Jitter

rem-jitter

57

The network jitter experienced by the remote RTP receiver

Jitter 0mS⁵⁷ #0

#rem-jitter-ev

58

The number of samples that were over the remote jitter threshold

Jitter 0mS #0⁵⁸

Avg-jitter

59

The average remote jitter

Avg-Jitter 0mS

Echo Cancellation:

Loss

loss dbm

60

The echo cancellation loss on the TDM bus. A high value (that is, a low absolute value) may indicate impairment of DCP terminals.

Loss 45dB⁶⁰ #1

#loss-ev

61

A counter that increments each time the echo-cancellation loss is sampled below its threshold

Loss 45dB #1⁶¹

Len

62

The last echo-cancellation tail length used for this session

Len 32mS

RSVP:

Status

63

The current (last) RSVP reservation state at the end of the session

Status Disabled

Failures

64

The total number of reservation failures during the session

Failures 0