The tag has no wiki summary.

learn more… | top users | synonyms

-3
votes
1answer
87 views

Do cellular network adapters (3G/4G/LTE) have MAC addresses?

We are implementing SSH restrictions by restricting by MAC address in iptables. Without the MAC address restrictions, using an app like iSSH, it's easy to access my server on the go to check on it's ...
1
vote
0answers
74 views

MTU on mobile data networks

I found various lists of MTUs for different links, but they never contain UMTS, LTE, EDGE, HSPA, GPRS. What are the MTUs of the above mentioned technologies?
10
votes
1answer
442 views

What are the data link protocols for cellular networks? [closed]

What are the link layer protocols for cellular networks? There are several platforms for high speed cellular networks. From GSM, to GPRS, W-CDMA, HSPA, LTE, etc. I (mostly) know about the physical ...
1
vote
1answer
66 views

Should a MobiTex service with a highly resilient website offer content over WAP? [closed]

I'm trying to offer services over the MobiTex network (also see wiki) and want to reduce double-work. I'm trying to understand if it is a good idea to WAP enable my website. Given that WAP usage is ...
2
votes
2answers
335 views

Alternate way to connect a vpn through a MIFI

This has gotten to be a major problem at our company and depending on who I ask, the problem either does not really exist (mfr. and vendor) or is insoluble ( according to most users including techs ...
0
votes
2answers
572 views

Recomend a 2G/3G/4G router with two or more SIM cards [closed]

I'm looking for a device that takes two or more GSM SIM cards, connects over 2G/3G/4G, depending on what is available in that area, and aggregates those links for higher bandwidth and/or redundancy in ...
0
votes
1answer
127 views

Poor indoor cell phone signal [closed]

Due to the construction materials of an office building, cell phone reception is poor, and it's quite common that calls are dropped. AT&T, Verizon, and RIM are the typical cell phone networks ...
-1
votes
2answers
509 views

Weird Mac Address at Windows 2003 DHCP Server

I am trying to configure a reservation for my Galaxy. The problem is that my DHCP is giving out an IP address to an obviously invalid MAC address (Galaxy Mac Address) - Please note attached ...
3
votes
1answer
166 views

Dynamic DNS service for low qps but high deployment count

I deploy cellular modems that currently have sims with static ip addresses. For various reasons, we may move to providing sims without static ips. The cellular modem supports DDNS (bluetree modem). ...
2
votes
1answer
3k views

How do I troubleshoot an IPsec tunnel (from a cellular router to a public server)?

I'm new to IPsec and struggling with a setup that might soon be widely used in our operations (provided I do understand it, eventually...). A cellular router (blackbox by netModule, from its log ...
0
votes
1answer
100 views

Receiving cell phone emails through MS Exchange 2007

I am encountering a strange problem whit receiving cell phone emails via my MS Exchange 2007. When my customer needs to send me a picture of a container he/she takes a photo with a cellphone and ...
2
votes
2answers
1k views

Keeping a persistent 3G connection on Windows

I'm in charge of managing an array of Windows Embedded 7 Standard based PCs (they act just like plain old Windows 7). The computers have 3G cards as their only means of communication, and are on ...
3
votes
1answer
138 views

How (in)secure are cell phones in reality? [closed]

I was recently re-reading an old Wired article about the Kaminsky DNS Vulnerability and the story behind it. In this article there was a quote that came across a little bit exaggerated to me: ...
1
vote
0answers
1k views

How do I route incoming landline calls out to a cell phone on a Cisco CCME 7.0?

We use a Cisco 2811 router which is connected to the PSTN via ISDN PRI, and you might remember this question about that selfsame ISDN circuit. We have licked all the trouble we had between ...
2
votes
4answers
1k views

Extending Cell Phone Coverage and Reception Strength in Basement - Do Cell Phone Extenders Work?

In our offices we have a very strong cell phone signal above ground, however in our conference room in the basement, Verizon & Sprint have almost no coverage (while AT&T works, it is 1 or 2 ...