D-Link DWR-978 User Manual

72D-Link DWR-978 User Manual
Section 5 - Troubleshooting
You should start at 1472 and work your way down by 10 each time. Once you get a reply, go up by 2 until you get a fragmented
packet. Take that value and add 28 to the value to account for the various TCP/IP headers. For example, lets say that 1452 was the
proper value, the actual MTU size would be 1480, which is the optimum for the network we’re working with (1452+28=1480).
Once you nd your MTU, you can now congure your router with the proper MTU size.
To change the MTU rate on your router follow the steps below:
• Navigate to the conguration page.
• To change the MTU, enter the number in the MTU eld and click Apply to save your settings.
• Test your email. If changing the MTU does not resolve the problem, continue changing the MTU in increments
of ten.

D-Link DWR-978 Specifications

General

DSL WAN	No
Ethernet WAN	Yes
3G/4G USB modem compatibility	-
4G standard	LTE-FDD
3G standards	WCDMA
SIM card type	NanoSIM
Wi-Fi band	Dual-band (2.4 GHz / 5 GHz)
Wi-Fi standards	802.11b, 802.11g, Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac)
Top Wi-Fi standard	Wi-Fi 5 (802.11ac)
WLAN data transfer rate (max)	2600 Mbit/s
WLAN data transfer rate (first band)	800 Mbit/s
WLAN data transfer rate (second band)	1733 Mbit/s
Product type	Tabletop router
Product color	White
LED indicators	LTE, Power, WAN, WLAN
Cabling technology	10/100/1000Base-T(X)
Networking standards	IEEE 802.11k, IEEE 802.11r, IEEE 802.11v
Ethernet LAN data rates	1000 Mbit/s
Ethernet LAN interface type	Gigabit Ethernet
USB 2.0 ports quantity	1
Ethernet LAN (RJ-45) ports	4
Security algorithms	WPA, WPA2, WPA3
Antennas quantity	8
Output current	1 A
Output voltage	12 V
Power source type	AC
Storage temperature (T-T)	-10 - 70 °C
Operating temperature (T-T)	0 - 40 °C
Storage relative humidity (H-H)	5 - 95 %
Operating relative humidity (H-H)	10 - 90 %
Mobile operating systems supported	Android, iOS
Number of products included	1 pc(s)
Sustainability certificates	CE, RoHS

Weight and Dimensions

Depth	245 mm
Width	234.5 mm
Height	55.25 mm
Weight	920 g