7.12.3 Establishing A Call Between Two Devices - AudioCodes MediaPack MP-124 User Manual

At this time, a new REGISTER request is issued with the following response:
REGISTER sip:10.2.2.222 SIP/2.0
Via: SIP/2.0/UDP 10.1.1.200
From: <sip: 122@10.1.1.200>;tag=1c23940
To: <sip: 122@10.1.1.200>
Call-ID: 654982194@10.1.1.200
Server: Audiocodes-Sip-Gateway/device/v.5.40.010.006
CSeq: 1 REGISTER
Contact: sip:122@10.1.1.200:
Expires:3600
Authorization: Digest, username: 122,
realm="audiocodes.com",
nonce="11432d6bce58ddf02e3b5e1c77c010d2",
uri="10.2.2.222",
response="b9c45d0234a5abf5ddf5c704029b38cf"
7. Upon receiving this request and if accepted by the Proxy, the proxy returns a 200 OK
response closing the REGISTER transaction:
SIP/2.0 200 OK
Via: SIP/2.0/UDP 10.1.1.200
From: <sip: 122@10.1.1.200>;tag=1c23940
To: <sip: 122@10.1.1.200>
Call-ID: 654982194@10.1.1.200
Cseq: 1 REGISTER
Date: Thu, 26 Jul 2001 09:34:42 GMT
Server: Columbia-SIP-Server/1.17
Content-Length: 0
Contact: <sip:122@10.1.1.200>; expires="Thu, 26 Jul 2001 10:34:42
GMT"; action=proxy; q=1.00
Contact: <122@10.1.1.200:>; expires="Tue, 19 Jan 2038 03:14:07
GMT"; action=proxy; q=0.00
Expires: Thu, 26 Jul 2001 10:34:42 GMT

7.12.3 Establishing a Call between Two Devices

This section provides an example on configuring two AudioCodes' devices with FXS
interfaces for establishing call communication. After configuration, you can make calls
between telephones connected to the same device or between the two devices.
In the example, the IP address of the first device is 10.2.37.10 and its endpoint numbers
are 101 to 104. The IP address of the second device is 10.2.37.20 and its endpoint
numbers are 201 to 204. In this example, a SIP Proxy is not used. Internal call routing is
performed using the device's 'Tel to IP Routing' table.
To configure the two devices for call communication, take these 4
steps:
1. For the first device (10.2.37.10), in the 'Endpoint Phone Number Table' page (refer to
Configuring the Endpoint Phone Numbers on page 179), assign the phone numbers
101 to 104 to the device's endpoints.
Figure 7-6: Assigning Phone Numbers to Device 10.2.37.10
SIP User's Manual 342
MediaPack Series
Document #: LTRT-65410