Telviva Mobile is a mobile softphone application i.e. an application allowing users to make and receive calls from their mobile phones using Telviva. Telviva Mobile allows users to benefit from reduced call rates across all networks and international destinations and enables one to make and receive office phone calls on your mobile phone, ensuring users are always available.
Telviva Mobile allows users to leverage all the features offered on the Telviva platform, including call recording, conference calls and call transfers.
Telviva Mobile fully integrates with various address books, your mobile phone address book, Google Contacts and Telviva Shared contacts included. The application is available for free download through the Google Play Store and Apple App Store. Telviva Mobile turns your mobile phone into your home/office phone in an instant.
Telviva Service-specific features and benefits:
Reduced call rates across all networks, including international destinations
Speakerphone, mute & hold
Supports OPUS – G729 codec
Telviva Mobile additional features:
Interoperable with Android and iOS devices and all mobile networks and Wifi
Your firewall should allow outgoing & incoming UDP to the public internet
We utilize Websocket connections so HTTPS / WebSocket / Secure RTP should be allowed
Local network conditions have the biggest impact on voice quality. Jitter, latency, and packet loss can be the biggest contributors to voice quality issues in any VoIP network.
The time it takes the RTP (media) packets to arrive at the destination
Causes media delivery delays, callers may speak over the top of each other.
Packets that don’t make it to the final destination
Causes gaps and cut-outs in media, callers may not hear the other side
Packets that arrive at the destination out of order
Cause a ‘robotic’ distortion effect in media, or packet loss when overrunning the jitter buffer
Latency: High latency can substantially degrade a caller’s experience. While there will always be some latency between the codec algorithm, the jitter buffer, and network traversal, the goal is to keep this to a minimum. Callers typically start to notice the effect of latency once it breaches 250ms, and find latency above ~600ms to be nearly unusable. Here are some strategies to minimize latency on your network:
Some lower bandwidth fixed internet connections can often have higher latency. If possible, upgrade your internet connectivity.
Stick to high-bandwidth connections. Mobile networks such as LTE (mobile 4G Data) can often have high latency.
Jitter: Packet loss, most frequently jitter-induced packet loss, can make a big impact on your VoIP call quality. Wi-Fi can be particularly bad for creating jitter. Here are some strategies to minimize jitter on your network:
Reduce packet conflicts on Wi-Fi by reducing the number of devices operating on the same channel.
Avoid large data file transfers over the same Wi-Fi environment concurrently with voice.
Avoid buffer bloat, which can result in high latency, and bursts of jitter. We recommend ensuring your router is configured with the low buffer size, as high jitter cannot be masked by a buffer without introducing artificial delay, and often choppy audio.Note: Not all routers allow for configuring buffer sizes, but some routers ship with defaults which are not optimized for real-time VoIP networks. Open-source routers, enterprise-grade routers and gamer-oriented routers are good candidates for providing the right configuration options and defaults.
If you have addressed the above issues and continue to have jitter related impact on your voice quality, you may consider configuring your router with QoS rules to prioritize traffic on the above media UDP ports. Given the large range of UDP ports, you should only do this with prior consideration to what other traffic may be flowing in that port range.
By following this guide, you can significantly improve quality of service for the wireless voice applications and reduce or eliminate dropped calls, choppy speech, fuzzy speech, buzzing, echoing, long pauses, one-way audio, and issues while roaming between access points.
3 key metrics for voice quality:
Network MOS – The Network Mean Opinion Score (MOS) is the network’s impact on the listening quality of the VoIP conversation. The score ranges from 1 to 5, with 1 being the poorest quality and 5 being the highest quality.
Packet Loss Rate – The packet loss rate is the percent of packets that are lost during transmission.
Interarrival Jitter – Interarrival jitter measures the variation in arrival times of packets being received in milliseconds (ms).
Below is a summary of the best practices to provide the best voice quality over wireless.
Perform a pre-install RF survey for overlapping 5 GHz voice-quality coverage with -67 dB signal strength in all areas. (Use Wifi Analyzer App)
If possible, create a new SSID dedicated to your voice over IP devices.
Set Authentication type to ‘Pre-shared key with WPA2’
Set WPA encryption mode to ‘WPA2 only’
Enable ‘5 GHz band only’.
Enable ‘Traffic shaping’ on the SSID to prioritize all voice traffic
SIP 5060 UDP / TCP – RTP 10000-20000 UDP – internal Network / UDP 65550 if Vibe goes via Firewall
Set DSCP to ’46 (EF – Expedited Forwarding, Voice)’ for RTP
There are known issues with Truecaller presenting the wrong name to the user. Telviva Mobile passes the correct name into CallManager. If Truecaller is enabled as your dialler that notification goes to Truecaller. It seems to ignore the name we pass and does a lookup of some sort in their own database with a sloppy match.
So the short extension codes match arbitrary other Truecaller users.
We discovered that if you go into the Truecaller app and tap the “i” button next to the call, there is a little pencil by the name and you can correct it.
Having done that it will show the corrected name.
You can also go to Settings > Apps&Notifications > Truecaller and turn off “Phone app”. However when incoming calls came in, Truecaller still overlays a callerid display but without any name.
Our advice is to disable Truecaller in order to have a better experience with Telviva Mobile.