You could probably swap out the telephone wire for explosives and you'd have a quick way to clear out obstacles. Pretty sure it's a system that's used IRL but I can't remember it's name.
1. Wire-guided missiles are a thing. Usually, in anti-tank role. Torpedoes also use them for guidance. In both cases, wire spools off from moving object, trailing behind it.
2. We already have a lot of fine systems to clear out obstacles. Our problem is establishing communications with our troops through jamming, while on offensive.
3. Proposed telephone missile contains radio and allows one to rapidly push unjammable communications forward, to troops.
4. In case of missile destruction or wire cut, you just shoot next missile.
5. Only problem is missile destroying itself on impact, so it needs to be either slow (and interceptable), have a deceleration system (which increases cost) or be robust enough to survive impact (which is also increases cost, but differently). All three scenarios allow missile components to be reused if recovered.
6. Oh damn, we need to put scuffle charges into the missile. There's no command codes in it, but it would still be bad if G&K recovers it.
7. Missile is rather extremely dumb otherwise and depends upon Ringleader to guide it to deployment point and then establish command channel through it. Because it's already trailing telephone wire behind it.
8. Unlike specialized dinergate solution, missile is extremely obvious on deployment, can't spool wire back on and relocate and, frankly, is "Oh shit, I'm being jammed" button
Dinergate-based field telephone system, aka fiberoptic spool on legs, meanwhile, can be used in offensive situations, can relocate the control endpoint, can be hidden, can be also used to lay cable when needed elsewhere, but less well suited for emergency deployment.
Also obvious solution is to chain dinergate field telephone with missile field telephone.
