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SIP/IAX client configuration

Different SIP clients (hardware SIP phones, ATAs and software ones) have different configuration screens, but all have a common set of configuration parameters. In the table below, username and password are your 9-digit long login name and 6-digit long password you received in the sign-up confirmation e-mail.
Configuration parameterValue
SIP server (or proxy, or domain)sip.callwithus.com
SIP proxy (or "Outbound Proxy")leave blank
STUN serverstun.callwithus.com, port 3478
Username (or User ID)username
Passwordpassword
Auth name (or Auth ID)username
Display Name (used for callerId information when you place a call)Your name
Register (or Send registration request)Yes
Register Expiry (or ReRegistration interval)120 sec (2 minutes)
Silence suppression (or Voice Activity Detection)On
Use DNS SRVYes

Here are the examples of different VOIP clients configuration (thanks to our users!)

If your SIP client is behind a firewall, make sure your firewall does not block UDP port 5060 and the range of UDP ports used for voice transmission (see your firewall and SIP client documentation for details).

Configuration of IAX protocol-based clients is very similar to SIP ones. The firewall should be open on UDP port 4569.

Asterisk PBX configuration

IAX (iax.conf)SIP (sip.conf)
[general]
register => username:password@iax.callwithus.com

[username]
type=friend
host=iax.callwithus.com
username=username
secret=password
qualify=no
 [general]
;canreinvite=no ;if your asterisk box is behind NAT router
register => username:password@username

[username]
type=friend
host=sip.callwithus.com
username=username
secret=password
qualify=no
insecure=invite
Note: use either SIP or IAX protocol to connect to our server, but not both at the same time!
If you forward incoming DID calls to external URI, the calls could come from either west.callwithus.com or east.callwithus.com, make sure your settings and dialplan support multiple hosts, see FAQ for details.

Preferred server. You can use a preferred server, select the server you have the best ping time to.
  • San Jose, CA - west.callwithus.com
  • Lansing, MI - east.callwithus.com


Caller ID setup

We suggest you to add your real telephone number (starting with the area code, 5557772222 for example) to caller ID ("Add Caller Id" menu in your control panel). When you place a call this real number will be shown to the called party. Caller ID spoofing and/or telemarketing calls are not allowed with our service.

DID destination setup

You can set up your DID to forward incoming calls to PSTN or cell phone line or to any VOIP destination. See more details in Q&A section.
 

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Fine print: All prices are final, there are no bogus fees and unfees. Period. Only SIP/IAX devices that have already been created can be connected to callwithus.com to make calls. Please ensure you only use devices approved by you (Please do not try and connect using two tin cans and a piece of string as we do not yet support this, but we may support this in the future). Callwithus.com monthly subscription charge of $0 must be paid in advance and does not include tax of $0 which also must be paid in advance. You will be billed an activation fee of $0 plus tax and this must be paid in advance. Calls made incur tax at the rate of 0% each month and must be paid in advance. On cancellation of service you will be charged a one time only disconnection charge of $0. Additional features such as caller ID with name on incoming calls will be billed at the additional rate of $0 per call. All **YOUR** rights reserved.

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