Yeastar P-Series SIP Trunk Configuration
Simtex SIP Trunks from $4.99/month
Business-grade SIP trunking with geo-redundant infrastructure, crystal-clear audio, and Australian-based support. Pay-as-you-go or unlimited plans available.
SIP Servers:
- West Coast (AU):
siptcp.simtex.com.au - East Coast (AU):
siptcpeast.simtex.com.au
Choose the server closest to your PBX. The Yeastar P-Series supports DNS-NAPTR transport for automatic server discovery and failover.
Do not expose your PBX to the public internet. In 99.9% of cases you do not need any ports forwarded on your router or firewall to connect to Simtex. If you are unsure, speak to us first.
Reboot required. Unlike most Yeastar configuration changes that take effect with just “Save and Apply”, enabling or disabling TCP transport requires a full PBX reboot. Plan this change during a maintenance window.
Trunk types explained: Yeastar P-Series offers three trunk types. Register Trunk is the correct choice for Simtex — the PBX authenticates with your account credentials and registers with our SIP servers. Peer Trunk is for IP-based authentication (no credentials). Account Trunk is when external devices register TO your PBX.
DNS-NAPTR for automatic failover: Instead of selecting TCP as the transport, you can select DNS-NAPTR and set the port to
0. The PBX will then query DNS SRV/NAPTR records to automatically discover the correct server, port, and transport — providing automatic failover across our geo-redundant server farms.East Coast? Replace
siptcp.simtex.com.au with siptcpeast.simtex.com.au in both the Hostname/IP and Domain fields if your PBX is located on the East Coast of Australia (NSW, VIC, QLD).G.711 A-Law is the standard codec for Australian PSTN interconnection. It provides toll-quality audio at 64kbps with zero transcoding overhead. Always place it first.
Channel security: Set Maximum Concurrent Calls to the number you actually need. This acts as a hard limit — if your system is compromised, attackers can't exceed this call count.
Recommended Dial Patterns for Australian Numbering
| Description | Dial Pattern | Strip | Prepend | Example Dialled |
|---|---|---|---|---|
| Local (8-digit with area code) | XXXXXXXX | 0 | 94883344 | |
| National / Mobile (leading 0) | 0XXXXXXXXX | 0 | 0412345678 | |
| Emergency | 000 | 0 | 000 | |
| 1300 / 1800 Numbers | 1[38]00XXXXXX | 0 | 1300888519 | |
| 13 Numbers (6-digit) | 13XXXX | 0 | 131313 | |
| International (0011) | 0011. | 0 | 001161894883344 |
International dialling: If you do not need international calls, simply leave out the
0011 dial pattern. This is the simplest way to prevent unauthorised international dialling and potential toll fraud.Wildcard syntax: Yeastar uses Asterisk dial pattern notation.
X matches any digit 0–9, Z matches 1–9, N matches 2–9, and . matches one or more characters.Caller ID validation: Simtex validates outbound caller IDs against your account. Only DIDs allocated to your trunk will be transmitted — any other number is replaced with your main trunk number automatically.
Trunk not registering? Check these common issues:
- Verify your account number (
214XXXXXXX) and password — copy/paste to avoid typos - Ensure TCP transport is enabled globally (Step 1) and the PBX has been rebooted since enabling it
- Confirm the Transport is set to TCP on the trunk and Port is
5062 - Check your firewall allows outbound TCP connections
- Try the alternate server (
siptcpeast/siptcp) in case of regional issues
Always disable SIP Guest calls on production systems. Leaving this enabled allows unauthenticated callers to place calls through your PBX — one of the most common causes of toll fraud.
Common Questions
Register Trunk. Simtex uses credential-based authentication. Your PBX registers with our SIP servers using your account number and password. Peer Trunk is only used when a provider authenticates by IP address.
Last updated 30 March 2026