InnoMedia HG8328-1W, Административное руководство

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InnoMedia HG8328-1W Administrative Guide
Page 40
Copyright © 2019 InnoMedia. All rights reserved.
Test condition by checking for a non-linear DC
resistance.
REN Test This procedure measures REN (Ringer
Equivalence Number) loading by measuring
the load impedance at 20 Hz. An REN
loading of less than 0.175 REN or greater
than 5 REN is reported as a failure.
Resistive Faults
Test This procedure measures TIP to RING on-
hook DC resistance. A DC resistance less
than 150 kΩ is reported as a failure.
4.4.2 GR909 Tests: triggered from SIP NOTIFY Message
The MTA supports server-initiated GR909 tests triggered by an incoming SIP NOTIFY Message with “ Event:
gr909” . Example trace as follows:
NOTIFY sip:2148298788@172.16.0.119;user=phone SIP/2.0
Via: SIP/2.0/UDP 172.16.200.212:5060;branch=z9hG4bKac101ead5060-
76517495;rport
From: <
sip:GR909@172.16.200.212
>;tag=rebootapp_tag
To: <sip:
2148298788
@
172.16.0.119
;user=phone>
Event: gr909
Call-ID: 3-75ff0490-4bdccd8@ac101ead
CSeq: 1401 NOTIFY
Max-Forwards: 70
Contact: <
sip:GR909@172.16.200.212
>
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