SL2100 Intermedia SIP Trunk Configuration

SL2100 Intermedia SIP Trunk Configuration

This Tech Tip will demonstrate all of the program settings needed to work with Intermedia SIP Trunks. This tip applies to the NEC SL2100 Only.

Get Connected

This Tech Tip requires access to the phone system using NEC PCPro Programming Software. To download the latest version of PCPro or for instructions on how to connect your computer to the phone system, please read the following: How to Connect to the NEC SL2100 or SL1100 Phone System for Programming.

PCPro Programming Steps

Use the program settings below to configure Intermedia SIP Trunks with the NEC SL2100 phone system.

Program 10-12: CPU Network Setup

01 – IP Address192.168.0.10
02 – Subnet Mask255.255.255.0
03 – Default Gateway0.0.0.0
04 – Time Zone(GMT -05:00) Eastern Time
05 – NIC SettingAutomatic detection
06 – NAPT Router IP Address0.0.0.0 (Use to find it)
07 – ICMP Redirect0
08 – VOIPDB IP Address172.16.0.10
10 – VOIPDB Subnet Mask255.255.255.0
11 – VOIPDB NIC SettingAutomatic detection

Program 84-26: VOIPDB Basic Setup (DSP)

01 – VOIPDB DSP IP Address192.168.0.10
02 – RTP Port255.255.255.0
03 – RTCP Port0.0.0.0

Port Forwarding

Please consult with the on-site IT personnel for this portion.

You will now need to forward ports in the clients Router or Firewall to allow the inbound traffic from Intermedia’s Servers.

You will need to forward Port 6060 (UDP) to the phone system’s IP address in 10-12-09. This will be the signaling port.

Next, you will need to forward a range of ports for audio/voice.

Forward RTP/UDP ports 10020-10083 to the IP address in 84-26.

In addition, SIP ALG must be disabled on all involved network components (ISP Modems, Routers, Firewalls, etc.).

Program 10-67: SIP Stack Configuration Setup

Setting No: 01

Trunk Type: SIP

Start Port:  This value should be the Port Number of the first available line port AFTER you account for all of your physical CO-Line Ports.

  • Example: If your Phone System has (1) CO-Line Card. Then 3 Ports are dedicated to CO Lines, so your value would be “4”
  • Example 2: If your Phone System has (2) CO-Line Cards. Then 6 Ports are dedicated to CO Lines, so your value would be “7”, Even if you are using only 4 of the 6 CO Ports, your value would still be “7”

Number of Ports: This value should be the number of SIP Trunks, and should match the number of SIP Trunk Licenses you have installed in the system.

Program 10-68: IP Trunk Availability

01 – DNS ModeON
02 – DNS IP Port8.8.8.8

Program 10-03: VOIPDB Configuration

Physical PortTrunk Logical PortTrunk Type

Program 10-28: SIP System Information Setup

01 – Domain Namecom
02 – Host Nameuc70.accessline
03 – Transport ProtocolUDP
05 – Domain AssignmentDomain Name

Program 10-29: SIP Server Information Setup

01 – Outbound Default ProxyChecked
02 – Inbound Default ProxyUnchecked
03 – Default Proxy IP Address(Emailed by Intermedia)
04 – Default Proxy Port6060
05 – Register ModeManual
06 – Registrar IP Address(Emailed by Intermedia)
07 – Registrar Port6060
08 – DNS ModeChecked
09 – DNS IP Address8.8.8.8*
10 – DNS Port53
11 – Registrar Domain
12 – Proxy Domain Namecom
13 – Proxy Host Nameuc70.accessline
14 – SIP Carrier ChoiceCarrier N**
15 – Registration Expiry Time3600
16 – Register Sub ModeUnchecked
17 – DNS Source Port53
20 – Authentication Trial1
21 – NAT Routeryes

*Use any valid domain name server such as Google’s address in field 09.

**We have seen this value be either C or N. Start with Carrier Choice C and test before changing it to N (this will require a system reboot).

Program 10-36: SIP Trunk Registration Information

Registration ID00
User ID3215551234 (main number)
Authentication User IDThe User Id that was Emailed
Authentication PasswordThe Password that was Emailed

Program 20-08: Class of Service

13 – Set Calling Party NumberChecked

Program 21-17: IP Trunk (SIP) Calling Party Number Setup for Trunks

TrunkCalling Party Number (main number)

Program 84-13: SIP Trunk Codec Information Basic Setup

28 – Audio Capability PriorityG.729_PT
30 – Auto Gain Control0
31 – DTMF Payload Number101
32 – DTMF Relay ModeRFC2833

Program 22-02: Incoming Call Trunk Setup

TrunkMode 1Mode 2Mode 3Mode 4

Program 20-11: DID Translation Table

DID Translation Table EntryReceived NumberTarget Number

Program 15-07: Function Keys

Function KeyFunctionAdditional Data
01*01 – Trunk Key1
02*01 – Trunk Key2
03*01 – Trunk Key3
04*01 – Trunk Key4

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